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Integration of two dual-port substrate integrated waveguide based MIMO antennas on a common substrate for 5G millimeter wave applications Frequenz (IF 1.1) Pub Date : 2024-03-22 Abhik Gorai, Jyoti Ranjan Panda, Wriddhi Bhowmik, Arindam Deb, Rowdra Ghatak
This paper presents method for integrating two dual port multiple input multiple output (MIMO) antennas on a common substrate based on substrate integrated waveguide (SIW) technology. One of the dual port MIMO antennas (MIMO_1) resonates at 31.2 GHz with an impedance bandwidth of 1 GHz while the other dual port MIMO antenna (MIMO_2) exhibits an impedance bandwidth of 925 MHz and resonates at 36 GHz
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Gain enhancement in octagonal shaped frequency reconfigurable antenna using metasurface superstrate Frequenz (IF 1.1) Pub Date : 2024-03-14 Karthika Kandasamy, Kavitha Kaliappan, Sasikala Shanmugam, Adithya Srinivasan
A novel, high-gain reconfigurable antenna with a metasurface (MS) superstrate-based configuration is proposed in this research article. The design utilizes a concentric octagonal-shaped patch as a base antenna. Four SMP1345-079LF PIN diode switches are incorporated in the base antenna to facilitate frequency reconfiguration. When all four of the diodes are in OFF condition, the designed antenna resonates
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A calibration method for vector network analyzers using a line and three or more offset-reflect standards Frequenz (IF 1.1) Pub Date : 2024-03-12 Yujie Liu, Guobin Wan, Changying Wu, Yevhen Yashchyshyn, Yingfan Wang, Limin Tu
This article proposes a method for two-port vector network analyzer (VNA) calibration that uses a line standard and three or more offset-reflect standards (LnΓ, where n is the number of offset-reflect standards and n ≥ 3). The reflection coefficient of the highly reflecting offset-reflect standards and the propagation constant of the transmission line are unknown for this calibration method, but they
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Design and investigation of cavity backed bowtie antenna with unidirectional radiation pattern using characteristic mode analysis Frequenz (IF 1.1) Pub Date : 2024-03-08 Jagadeesh Babu Kamili, Amitabha Bhattacharya
In this work, a novel cavity backed leaf-shaped bowtie antenna is designed using Characteristic Mode Analysis (CMA). An analytical expression is proposed to arrive at the leaf shape of the bowtie antenna using optimization process. The developed antenna is backed by a square-cavity to get unidirectional radiation pattern with high gain and good front-to-back-ratio characteristics. CMA technique is
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The design and decoupling of TX/RX antenna with omnidirectional conical beam operating at V band Frequenz (IF 1.1) Pub Date : 2024-03-08 Zhu Duan, Rubing Bai, Zhongyun Li, Rong Hu, Qian Ling, Yunhua Tang
In this work, a high isolation transmitter–receiver antenna with omnidirectional conical beam operating at 61.5 GHz is presented. The proposed dual-antenna system consists of a transmitter (TX) antenna and a receiver (RX) antenna with the same structure, composed of a circular metal patch with ring slot and metal shorting vias, fed by a coaxial probe at their respective geometric center. And both antennas
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A compact dual-element UWB-MIMO antenna with single band-notched characteristics Frequenz (IF 1.1) Pub Date : 2024-03-06 Neha Dalakoti, Priyanka Jain
In this paper, a UWB MIMO (multi-input multi-output) antenna working from 3.3 GHz to 10 GHz with a single band notch at 4.5 GHz has been proposed. The antenna comprises of two circular microstrip patches of radius 6.4 mm with tapered microstrip feed line of input impedance 50 Ω connected to them. 1.6 mm thick FR4 substrate (εr = 4.4, tanδ = 0.02) of length and width 38 mm × 38 mm has been used. Partial
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Antipodal vivaldi array MIMO antenna for 5G FR2 applications at 28 GHz with improved isolation Frequenz (IF 1.1) Pub Date : 2024-03-04 Ramysree Golla, Suman Nelaturi
This paper proposed a two port antipodal vivaldi antenna (AVA) for 5G FR2 (frequency range 2) applications at 28 GHz with improved bandwidth,gain and isolation. Each antenna consists of two array elements. The proposed antenna has dimensions 23.8 × 54 × 0.79 mm3 and is fabricated on Rogers RT/Duroid 5880 material. This material has a 2.2 low dielectric constant and mainly suitable for broadband high
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3D printed circularly polarized implantable antenna with wideband impedance matching Frequenz (IF 1.1) Pub Date : 2024-03-04 Li-Jie Xu, Qiang Liu, Meng-Yao Huang
This article proposes a slot-loaded circularly polarized implantable antenna with wide bandwidth at 2.45 GHz, i.e., Industrial, Scientific, and Medical (ISM) band. This antenna is established with a compact size of 44.52 mm3 based on 3D printing technology, and biocompatible material MED610 is adopted for human safety consideration. During the design, unilaterally shorted patch antenna loaded with
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Imaging of cylindrical inhomogeneites in a parallel plate waveguide with reverse time migration method Frequenz (IF 1.1) Pub Date : 2024-02-19 Tanju Yelkenci
While reverse time migration (RTM) algorithm is commonly used in geophysical explorations, this paper addresses the RTM imaging procedure for reconstructing of lossy dielectric discontinuities in a planar waveguide using electromagnetic waves at a single frequency. The direct problem of the related configuration is solved via method of moments (MoM) to produce the synthetic scattered data to be used
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Revolutionizing healthcare with metamaterial-enhanced antennas: a comprehensive review and future directions Frequenz (IF 1.1) Pub Date : 2024-02-15 Sakthi Preetha Asokan, Kavitha Kaliappan
The state of the art for wearable antennas for wireless communication and biological applications is compiled in this article. It addresses a wide range of subjects, such as how to use novel materials like Artificial Magnetic Conductors (AMC) and Metamaterial (MTM) structures to enhance antenna performance. It also covers the design of dual-band and reconfigurable antennas and the use of machine learning
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Dual-band circular polarized microstrip antenna for GNSS application Frequenz (IF 1.1) Pub Date : 2024-02-14 Haiyang Wang, Bianmei Zhang, Xiaoming Liu, Xiaofan Yang, Ran Zhang, Ye Wang
A dual-band circular polarized antenna with broad bandwidth is proposed. Two circular grooves with different radii are carved on the ground to generate two frequency bands. Two rectangular slots are engraved on the outside of the circular groove. By adjusting the length of the two slots, this antenna can radiate right-handed circularly polarized (RHCP) waves at two frequency bands, which can cover
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High gain and high-efficiency compact resonator antennas based on spoof surface plasmon polaritons Frequenz (IF 1.1) Pub Date : 2024-02-14 Dou Tian, Amin Kianinejad, Jiafu Wang, Chen Guo, Anxue Zhang
We proposed a high gain high-efficiency compact metallic resonator antenna operating at even-mode meander line spoof surface plasmon polaritons (MLSSPPs). The high radiation efficiency is caused by the bulk of fields crowded in lossless air near the antenna rather than in lossy dielectric as in conventional dielectric resonator antennas (DRAs). The proposed antenna also exhibits compact size because
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A fast convergent solution of wave propagation for multilayer inhomogeneous cylindrical dielectric waveguides using a semianalytical method Frequenz (IF 1.1) Pub Date : 2024-02-12 Qianru Weng
This paper presents an accurate and efficient semianalytical method based on the Galerkin procedure for solving electromagnetic wave propagation problems in multilayer inhomogeneous cylindrical dielectric waveguides. The method represents the field in each inhomogeneous layer by a linear combination of eigenfunctions with unknown coefficients, which are expressed using the inner products of a series
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Design of a dual-band wearable flexible MIMO antenna system for ISM band applications Frequenz (IF 1.1) Pub Date : 2024-02-12 Lingsheng Yang, Yuhan Sun, Jiaru Zhang, Yizhuang Xie
This article proposes a dual-band (2.4/5.8 GHz) wearable MIMO antenna system that can be applied to the ISM band. The antenna element uses an improved coplanar waveguide feeding structure. The four-element antenna system achieves high isolation between antenna elements through the self-decoupling structure of the antenna element and the orthogonal placement. The use of a floating ground structure effectively
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Design and equivalent circuit modelling of super compact ultrathin metamaterial absorber for microwave frequency Regime Frequenz (IF 1.1) Pub Date : 2024-02-10 Vishal Puri, Hari Shankar Singh
This article is an attempt to design and develop a metamaterial-based microwave absorber with a low profile, broad incidence angle and compactness in the microwave frequency range. Further, equivalent circuit model of the proposed structure is discussed based on circuit theory. The unit cell focuses on achieving maximum absorption at C-, X-, and K-band. The dimensions of the proposed design are ultrathin
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Gain enhancement of ultra-wideband hexagonal slot antenna using tessellated rhombic loops based reflector Frequenz (IF 1.1) Pub Date : 2024-02-10 Ashish Kumar Verma, Rahul Singhal
A simple technique for gain enhancement of irregular hexagonal shaped ultra-wide band (UWB) slot antenna by inclusion of closely packed tessellated rhombic loop (TRL) based FSS is presented in this paper. The slot antenna is designed to cover entire UWB (3.1–10.6 GHz) frequency range with stable bi-directional radiation pattern. Also, it exhibits non-uniform boresight gain in zenith (θ = 0°) and nadir
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A study into strain sensor of cement-based material using CPW transmission lines Frequenz (IF 1.1) Pub Date : 2024-02-09 Chunyan Song, Mo Li, Weidong Zhang, Xiaodong Wu, Song Gao
Based on the theory of coplanar waveguide (CPW) transmission line, a novel microwave non-destructive strain monitoring sensor specifically designed for cement-based material structures is presented in this study. The aim is to establish the relationship between the variation of the S11 phase parameter of the CPW strain sensor and the structural strain, utilizing a linear analysis. The feasibility of
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Tri-arm MIMO array antenna pair for mobile phone applications Frequenz (IF 1.1) Pub Date : 2024-02-07 Min Zhang, Lehu Wen, Wenchao Xiao
An 8 × 8 tri-arm multiple-input multiple-output (MIMO) array using novel even–odd mode decouplers is presented. To decouple the directly connected driven ports on the tri-arm antenna pair, a T-shaped stub working as an even-mode decoupler and a narrow strip working as an odd-mode decoupler are elaborately introduced. Therefore, the even-mode and odd-mode impedances cross with the antenna input impedance
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Terahertz MIMO antenna array for future generation of wireless applications Frequenz (IF 1.1) Pub Date : 2024-02-07 Rashmi Pant, Leeladhar Malviya
The paper proposes a high gain, low ECC, and high isolation THz MIMO antenna array for future generation wireless applications to accommodate a growing population of mobile users. A THz MIMO antenna array is designed with dimensions of 1200 × 2200 × 191.29 µm3. It employs the array of double-slit complementary split-ring resonators (D-CSRRs) on the bottom layer to improve the gain, return loss, and
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A novel broadband and high-gain compact annular ring microstrip antenna for satellite applications Frequenz (IF 1.1) Pub Date : 2024-01-14 Vivek Arya, Tanuj Garg
This article presents a novel compact design of an annular ring microstrip antenna (ARMSA), which has two stacked annular rings and is fabricated on a FR4 substrate for radar and satellite applications. The presence of different kinds of slots made the design of the recommended antenna very unique for Ku band applications. This novel compact structure of the antenna provided enhanced bandwidth and
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CIQBCP-MIMO-DRA: CSRR inspired quad band circularly polarized MIMO-DRA for W-LAN, Wi-Max, Wi-Fi (6E) and X-band applications Frequenz (IF 1.1) Pub Date : 2024-01-13 Satyanarayan Rath, Sheeja Kochuthundil Lalitha
This paper emphasizes on amalgamation of MIMO antenna with DRA structures; explicitly useful to wireless applications. The feeding mechanism is accomplished by the symmetrically positioned tapered Y-shape lines. The design also encompasses a CSRR geometry along with two metallic reflectors. The incorporation of CSRR introduces novel investigation into traditional designs, resulting in improved isolation
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Shared-radiator design of broadband and dual-mode antenna for personal role radio applications Frequenz (IF 1.1) Pub Date : 2024-01-12 Guanjun Wang, Liang Zhu, Yayun Xie, Chao Lu
Shared-radiator design of a broadband and dual-mode antenna that simultaneously covers the VHF/UHF band and satellite navigation band is presented for personal role radio (PRR) applications. Quadrifilar helix antenna (QHA) is devised to be a circularly polarized radiator which as well acts as a part of the upper half radiation arm of the dipole antenna and be equivalent to a linearly polarized radiation
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Analysis of 5G Rotman beamforming lens antenna for higher beam angle and minimum phase error Frequenz (IF 1.1) Pub Date : 2023-12-26 Deep Kishore Parsediya, Pramod Kumar Singhal
Rotman lens beamforming networks are widely used for high gain, wide bandwidth applications in 5G communication. The uniform amplitude and phase distribution along with wide angle scanning at the array ports are mostly demanded for reducing the losses. Furthermore, minimum phase error is essential requirement for lens designs. Conventionally, for wide angle scanning, the lenses are designed by using
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Sub-THz pyramidal horn antenna for 6G wireless communication Frequenz (IF 1.1) Pub Date : 2023-12-22 Sunil Kumar, Saurabh Kumar
In this communication, a pyramidal horn antenna is proposed and investigated to operate in the sub-THz region at a centre frequency of 0.245 THz. The antenna has five layers such as coupling layer, air cavity layer, excitation layer, pyramidal horn, and extended side wings. The coupling layer is responsible to couple the electromagnetic (EM) wave from waveguide feed. The excitation layer consists of
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An implantable ISM band antenna for biomedical application Frequenz (IF 1.1) Pub Date : 2023-12-20 Moumita Bose, Ashim Kumar Biswas, Abhishek Sarkhel, Aparna Kundu, Ujjal Chakraborty
This article presents a compact implantable antenna for biomedical use in the ISM band (2.4–2.48 GHz). The antenna is designed with Roger RT/duroid 6010.2LM high permittivity substrate of thickness 0.25 mm, and feed with a 50 Ω co-axial feed. A hybrid-loop resonator slot structure and C & I-shaped slots in the radiating patch has enabled the antenna to work in the ISM band. Via less ground makes this
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Profile reduction of folded transmitarray antenna using multiple feeders Frequenz (IF 1.1) Pub Date : 2023-11-17 Guowei Li, Yuehe Ge, Zhizhang (David) Chen
In this paper, we introduce a novel design for a high-gain, low-profile quad-feed folded transmitarray antenna (FTA) to enable a more compact system. The proposed antenna system consists of a transmitarray, a reflectarray, and four identical planar microstrip U-slot patch antennas placed on the same surface of the reflectarray with an adjacent distance greater than 1λ. To compare the effectiveness
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Direction independent broad-band wide angle metamaterial absorber for “K” band applications Frequenz (IF 1.1) Pub Date : 2023-11-17 Laxmikant Dewangan, Megh Sainadh Patinavalasa, Juin Acharjee, Shrey Anant Sandiman, Saptarshi Ghosh, Nipun Kumar Mishra
In this work, the design of broadband, wide-angle, direction-independent metamaterial (MM) electromagnetic wave (EM) absorber for K-band frequency application is investigated and validated experimentally. The unit cell of the metamaterial absorber consists of four 90° rotated L-shaped metallic patches imprinted on a dielectric substrate backed by a metallic sheet. The structure yield absorption in
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Deep learning based distorted Born iterative method for improving microwave imaging Frequenz (IF 1.1) Pub Date : 2023-11-02 Amit D. Magdum, Harisha Shimoga Beerappa, Mallikarjun Erramshetty
The distorted Born iterative method (DBIM) is a popular quantitative reconstruction algorithm for solving electromagnetic inverse scattering problems. These problems are non-linear and ill-posed. As a result, the efficiency of the method is limited by local minima. To overcome this, a correct initial guess solution is needed to obtain a satisfactory result. The U-Net based Convolutional Neural Network
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Graphene based waveguide fed hybrid plasmonic terahertz patch antenna Frequenz (IF 1.1) Pub Date : 2023-10-31 Pallavi Mahankali, Shyamal Mondal, Rama Rao Thipparaju, Susila Mohandoss
The terahertz (THz) technology has fascinated lot of attention due to its enormous potential for a wide range of applications in the public, private and enterprise domains. This research work demonstrates the design structure and analysis of graphene based waveguide fed hybrid plasmonic THz patch antenna (HPTPA) constructed at around 3 THz. Hybrid plasmonic THz waveguide (HPTW) as a feeding line for
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A novel slotted dumbbell-shaped dielectric resonator antenna with enhanced bandwidth for C-band and 5G sub-6 GHz applications Frequenz (IF 1.1) Pub Date : 2023-10-31 Ravi Chandra, Dileep Kumar Upadhyay
This manuscript presents a novel aperture-coupled fed slotted dumbbell-shaped (SDS) dielectric resonator antenna (DRA) with enhanced bandwidth for 5G sub-6 GHz, short-range wireless communications, and C-band applications. The DRA is excited by HEM11δ mode. The proposed SDS-DRA is designed by assembling the four frustums of conical DRAs with the base and apex of one on top of another. The measured
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Equivalent circuit of a planar microwave liquid sensor based on metamaterial complementary split ring resonator Frequenz (IF 1.1) Pub Date : 2023-10-13 Samira Mekki, Rami Zegadi, Said Mosbah, Djamel Sayad, Issa Elfergani, Mohamed Lamine Bouknia, Jonathan Rodriguez, Arpan Desai, Merih Palandoken, Chemseddine Zebiri
In the present work, a study of a metamaterial complementary split ring resonator (CSRR) microwave planar sensor for dielectric liquid characterization is carried out using HFSS software. The design consists in a CSRR-loaded two ports rectangular patch microstrip-fed grounded planar structure. The investigated liquid sample is put in a capillary glass tube lying parallel to the surface of the sensor
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Design of the Wilkinson power divider with multi harmonic suppression Frequenz (IF 1.1) Pub Date : 2023-09-06 Chuan-Min Wang, Junbao Du, Lin Li, Rui-Feng Cao, Chao Pang, Yu-Xin Cui
A Wilkinson power divider (PD), which can suppress the second, third, and fourth harmonics is proposed. The PD is implemented based on an asymmetric meta-structure. The meta-structure is constructed be combing defect ground structure (DGS) and spoof surface plasmon polariton (SSPP). It can not only realize the impedance conversion function in the operating frequency band, but also realize the suppression
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A high-gain dual-beam folded transmit-reflect-array antenna based on phase-shifting surface Frequenz (IF 1.1) Pub Date : 2023-08-25 Min Zhang, Baiqing Tang, Xin Li, Peng Jiang, Wei Hu, Wen Jiang, Steven Gao
In this paper, a high-gain dual-beam folded transmit-reflect-array antenna is designed based on the shared aperture method. It consists of the top transmit-reflect-array, the bottom transmitarray, and the feed horn located at the center of the bottom transmitarray. A phase-shifting surface is proposed as the transmission unit cell capable of transmitting incident waves while providing adequate transmission
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High isolation frequency-reconfigurable UWB-MIMO antenna with on-demand WiMAX band elimination Frequenz (IF 1.1) Pub Date : 2023-08-24 Summaiyya Saleem, Deepak Bhatnagar, Sarita Kumari, Mohd Gulman Siddiqui, Dinesh Yadav
In this article, a planar dual-element frequency reconfigurable multiple-input multiple-output (MIMO) antenna for ultra-wideband (UWB) applications is studied. The frequency band can be switched between UWB operation and single band rejected UWB performance using a pair of PIN diodes in the MIMO configuration. The presented antenna is comprised of two similar slotted circular radiators, having tapered
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Defected ground structure based compact UWB dielectric resonator antennas with enhanced bandwidth Frequenz (IF 1.1) Pub Date : 2023-07-26 Rasmita Sahu, Hrudananda Pradhan, Biswa Binayak Mangaraj, Santanu Kumar Behera
This article introduces two new compact ultra-wide band (UWB) rectangular dielectric resonator antennas (RDRAs) with enhanced bandwidth (BW), gain, and directivity. The RDRAs are designed at 10 GHz resonant frequency. The proposed RDRAs are compactly designed using resonating dielectric material (RDM) of Alumina_96 pct (ε r = 9.4, tanδ = 0.006) with overall dimensions of 30 × 20 × 4.6 mm3. The RDMs
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Performance analysis of mmWave/sub-terahertz communication link for 5G and B5G mobile networks Frequenz (IF 1.1) Pub Date : 2023-07-24 Umar Farooq, Anjaneyulu Lokam
Millimeter (mmWave) and sub-terahertz communication is a key technology to support high data rate requirements of 5G and B5G mobile networks. However this field is still in its initial development stage because of the various technical difficulties in its practical implementation due to inherently distinct propagation properties of mmWave/sub-terahertz frequencies. A thorough investigation of mmWave/sub-terahertz
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Wideband self-isolated MIMO antenna element based on multiple adjacent modes coupling current cancellation for 5G mobile terminal application Frequenz (IF 1.1) Pub Date : 2023-07-24 Bo Pang, Wei Hu, Wen Jiang, Jie Liu, Bao Lu
In this article, a wideband self-isolated multiple-input multiple-output (MIMO) antenna element based on multiple adjacent modes coupling current cancellation is proposed for 5G mobile terminal. The wideband self-isolated technology based on multiple adjacent mode coupling current cancellation are demonstrated. With the combination of five adjacent loop modes, the −6 dB bandwidth of the proposed self-isolated
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Compact eight-shaped ISM-I band wearable antenna for wireless body area network applications Frequenz (IF 1.1) Pub Date : 2023-07-24 Ankur Utsav, Ritesh Kumar Badhai
The design and analysis of the electrically small eight-shaped wearable antenna for both on- and off-body communication is proposed in this paper. An eight-shaped radiating structure is placed over the jeans substrate and an I-shaped slot is introduced in the ground plane which makes the antenna resonates at the ISM-I band (2.4 GHz). The antenna has a compact size of 0.30λ 0 × 0.20λ 0 × 0.001λ 0, where
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Design and development of half impulse radiating antenna based ultra wide band system Frequenz (IF 1.1) Pub Date : 2023-07-21 Sandeep Kumar Singh, Sabyasachi Mitra, Romesh Chandra, Senthil Kalyanasundaram, Amitava Roy, Archana Sharma
An ultra wide band system utilizing Half Impulse Radiating Antenna topology has been designed and developed. A compact Marx generator and a solid dielectric pulse forming line fed the antenna. Based on pulse parameters, frequency range of 250 MHz–1250 MHz is chosen for antenna design. Analytical equations and CST Microwave Studio are used for design and analysis of the Antenna and ultra wide band system
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Dilemmas and directions of real-time detecting trapped individuals using ultra-wideband radar in building fire rescue Frequenz (IF 1.1) Pub Date : 2023-07-12 Song Wang, Wenguo Weng
The crucial component of a successful building fire rescue is detecting trapped individuals efficiently and supporting firefighters in planning rescue and evacuation routes simultaneously. Due to its insensitivity to heat flow, great penetration, and high accuracy, Ultra-Wideband radar is widely used in autonomous driving and medical monitoring, but it has not yet been shown its full potential in fire
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Performance analysis of a flexible wearable antenna with low SAR for biomedical application Frequenz (IF 1.1) Pub Date : 2023-06-30 Ramasamy M. Kuppusamy, Sapna B. Abdulkareem
This article presents a conformal monopole antenna for wearable application in ISM band frequency of 2.45 GHz. The antenna has a return loss of 50.18 dB with good radiation performance. The gain of the antenna is 1.09 dBi which is improved to 3.28 dBi using a metasurface consisting of 3 × 3 array elements. The proposed metamaterial integrated antenna is fabricated on 1 mm thick flexible PDMS substrate
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Circularly polarized multimode smart antenna system for micro base station application Frequenz (IF 1.1) Pub Date : 2023-06-28 Zhu Duan, Chen-Chen Xu, Feng Wang, Geyi Wen
A smart antenna system suitable for micro base stations is proposed, which consists of three left-handed circularly polarized designs operating at 3.5 GHz. The first one is an eight-port cylindrical conformal antenna with both omnidirectional and directional modes. Its maximum omnidirectional realized gain is 5.0 dBic, and its maximum single/dual beam realized gain under the directional mode on the
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A stacked dielectric magnetoelectric dipole antenna with embedded ceramics Frequenz (IF 1.1) Pub Date : 2023-06-25 Wei Luo, Zihao Wang, Yi Ren, Jia Ran, Bing Wang
A stacked dielectric magnetoelectric antenna with embedded ceramics (SDMEA-EC) is proposed. The antenna consists of a stacked dielectric resonator antenna with embedded ceramics and a leaf-shaped electric dipole (LSE-Dipole). To improve the performance of the magnetoelectric dipole antenna, a novel verification method is proposed by analyzing equivalent magnetic currents to meet the Huygens element
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SAR reduction techniques for WBAN and mobile applications Frequenz (IF 1.1) Pub Date : 2023-05-26 Vijay Gokul Selva Rajan, Kavitha Kaliappan, Suresh Kumar Natarajan
In recent years there has been a substantial growth in the usage of wireless gadgets in various fields like mobile communication, health monitoring, warfare communications, etc. However, the performance of the antenna is evaluated by the parameters like gain, directivity and bandwidth, VSWR and is enhanced as a continuous process. But on the other side, Specific Absorption Rate (SAR) is a parameter
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Compact hybrid EBG microstrip antenna for wearable applications Frequenz (IF 1.1) Pub Date : 2023-05-26 Trupti Pawase, Akshay Malhotra, Anurag Mahajan
A novel strip line fed, circularly polarized (CP), annular slotted dual band antenna using hybrid electromagnetic band gap (EBG) structure for Global Positioning System (GPS) has been herein designed, analyzed, and investigated for wearable applications. Adjusting the radii of the annular slots on the radiating patch excellent circular polarized (CP) radiation and impedance matching is achieved. The
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A Flexible Surface Description for Arbitrarily Shaped Dielectric Lens Antennas Frequenz (IF 1.1) Pub Date : 2023-05-24 Thomas Jaschke, Benjamin Rohrdantz, Arne F. Jacob
A method to efficiently describe arbitrarily shaped dielectric lens antennas based on spherical harmonics is proposed. It makes use of a Fourier-Laplace series and requires a low number of expansion coefficients, only. Symmetries can be included to impose special geometries or to further reduce the number of coefficients. The efficiency of the approach enables a fast optimization of the surface. This
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GPU acceleration of Nystrom type method for solving singular integral equations in H-polarized EM waves scattering by strip gratings Frequenz (IF 1.1) Pub Date : 2023-05-22 Mstislav E. Kaliberda, Leonid M. Lytvynenko, Sergey A. Pogarsky
In this paper, we propose the use of the graphics processing units (GPUs) for acceleration of solution of the H-polarized electromagnetic waves scattering by strip gratings. The approach combines the boundary integral equation method with the Nystrom-type discretization of singular integral equations and is realized with the use of C++ and OpenCL. The elements of the matrix of the resulting system
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A modified Jerusalem inspired bandpass FSS for multiband applications based on concentric ring slots Frequenz (IF 1.1) Pub Date : 2023-05-05 Joohi Garg, Sanjeev Yadav, Mahendra Mohan Sharma
This paper presents the design of a multi-band planar bandpass Frequency Selective Surface with the novel rings and a modified Jerusalem cross integrated structure. To begin, the proposed FSS array geometry is defined by constructing a unit cell size of order of 0.57 λ 0 × 0.57 λ 0 where λ 0 represents free-space wavelength of the first resonant frequency of the FSS periodic structure using novel concentric
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Effects of ground plane on a square graphene ribbon patch antenna designed on a high-permittivity substrate with PBG structures Frequenz (IF 1.1) Pub Date : 2023-04-19 Amina BENDAOUDI, Mohammed BERKA, Mohamed DEBAB, Zoubir MAHDJOUB
In this paper, a wide bandwidth (20 GHz) and small sized (200 × 200 × 50 µm3) terahertz (THz) square graphene ribbon antenna using Photonic Band Gap (PBG) substrate are investigated in the 0.6–0.8 THz band. The proposed antenna consists of graphene as radiating patch mounted on four types of ground plane. The important aim of this work is to eliminate the second resonance frequency by utilize a several
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Design of a compact metamaterial absorber with wide angular stability and polarisation insensitive for C, X and broad Ku band applications Frequenz (IF 1.1) Pub Date : 2023-04-14 Vishal Puri, Hari Shankar Singh
The article presents the design and development of a metamaterial-based microwave absorber having polarisation insensitivity, broad angle of incidence, low profile, and compactness in the microwave frequency range. The unit cell focuses to achieve maximum absorption at C-, X- and broad Ku-bands. The structure is simulated and the results are analysed for different angles of polarisation and angle of
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Compact dual-band narrowband bandpass filter with small frequency ratio Frequenz (IF 1.1) Pub Date : 2023-04-04 Shangjing Xi, Jianying Guo, Yannan Jiang, Kai-Da Xu
A compact but very simple dual-band bandpass filter (BPF) based on just five pairs of coupled lines is designed in this paper. It can be examined using the even- and odd-mode method because of its symmetry structure. Six transmissions zeros (TZs) can be obtained and calculated by using input impedance analysis. For demonstration, a dual-band narrowband BPF example with center frequencies at 0.94 and
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Dual-layer microstrip monopolar patch antenna with characteristic mode analysis Frequenz (IF 1.1) Pub Date : 2023-04-02 Shu Jiang, Hengfei Xu, Jiangling Dou, Dongquan Sun
A monopole-like stacked microstrip antenna with dual-layer patches is proposed for ultra-wideband applications. The characteristic mode analysis (CMA) is utilized and contributes to the multi-mode behavior investigation, guiding the design process. The dual-layer patches both consist of two concentric-coupled rings. The patch configuration is optimized according to the desired mode behaviors at different
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SIW-cavity based frequency reconfigurable antenna for IoT, WLAN, and 5G applications Frequenz (IF 1.1) Pub Date : 2023-03-21 Babu Lal Sharma, Dhirendra Mathur, Madan Kumar Sharma
In order to minimize antenna complexity and improve gain, a new compact size low profile SIW-cavity-based frequency reconfigurable antenna is presented for IoT, WLAN, and 5G applications. The proposed antenna miniaturization is achieved by incorporating SIW cavity using metallic vias. The reconfiguration mechanism is accomplished by etching a circular ring slot and a C-shaped slot at the top metallic
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SMCG research on electromagnetic scattering in arid area Frequenz (IF 1.1) Pub Date : 2023-03-06 Fengyun Jiang
This article is devoted to the study of electromagnetic scattering characteristics in arid areas, and proposes environmental monitoring and improvement methods. A four-component soil dielectric model was established to study the relationship of soil dielectric constant with soil moisture and frequency. As the Monte Carlo Method combined with Gaussian spectral function was used to simulate the actual
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Mutual coupling reduction with Peyton Turtle pattern nearfield surface for MIMO patch antenna Frequenz (IF 1.1) Pub Date : 2023-02-20 Alireza Omidvar, Pejman Rezaei, Elham Atashpanjeh
In this paper, a Decoupling Nearfield Surface (DNS) is designed above the antenna, to reduce the mutual coupling of closely two or more patch array. In this way, the electrical and magnetic distributions are utilized to demonstrate the mechanism of isolation. The proposed DNS element creates the electric field distributions with an orthogonal mode and the magnetic field distributions with excitation
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A corrugated and lens based miniaturized antipodal Vivaldi antenna for 28 GHz and 38 GHz bands applications Frequenz (IF 1.1) Pub Date : 2023-02-17 Amruta S. Dixit, Sumit Kumar, Mahesh Abegaonkar
The paper presents a dualband and compact antipodal Vivaldi antenna (AVA) array by using a dielectric lens (DL) and corrugations for 5G applications. The proposed novel antenna provides very high efficiency and it alleviates beam titling very effectively. Its efficiency is in the range of 95.93%–97.52% whereas the H plane beam titling is ± 1 ° $\pm 1{}^{\circ}$ over most of the frequency range. The
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A novel non-iterative algorithm for the joint design of transceiver beamforming and surface reflection in an IRS-enhanced MIMO system Frequenz (IF 1.1) Pub Date : 2023-02-15 Seyyed Mohammad Javad Asgari Tabatabaee, Farid Samsami Khodadad
Intelligent reflecting surface (IRS) is an emerging and low-cost revolutionary technology that can be deployed in future communication systems to enhance data transmission performance. An IRS comprises a lot of small, passive, and low-cost elements that can smartly reflect the incident signal from the transmitter to the receiver. In this paper, an IRS-enhanced multiple-input multiple-output (MIMO)
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Dual-band open-loop monopole (2 × 1) printed MIMO antenna for 4G and 5G applications Frequenz (IF 1.1) Pub Date : 2023-02-15 Abdulghafor A. Abdulhameed, Falih M. Alnahwi, Abdulkareem S. Abdullah
This paper presents a compact dual-band open-loop monopole MIMO antenna to serve 4G/5G applications. This antenna consists of two printed monopole antennas with very high isolation. Two enhancement techniques are utilized to improve the isolation between ports. Since each technique can provide high isolation of a single band, a combination of λ/4 slot and T-shape techniques are used to achieve high
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Design of dual-band BPFs with high selectivity Frequenz (IF 1.1) Pub Date : 2023-01-13 Min Wang, Lei Chen, Tian Tian Zhang, Jia Yi Peng
In this article, two dual-band microstrip bandpass filters (BPFs) with high selectivity and independently controllable passbands are designed based on three parallel-coupled lines (TPCLs). The first BPF proposed in this paper is achieved by employing a pair of folded F-type resonators (FFRs) and conventional TPCL structure. By adjusting the above parameters of each FFR, the center frequencies of the
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Design and analysis of novel DGS-loaded low-pass filter with wide stopband Frequenz (IF 1.1) Pub Date : 2023-01-13 Galip Orkun Arican, Ihsan Kanbaz, Zohreh Noamadeh, Ertugrul Aksoy
This article deals with design and development of a novel 7th order low-pass filter with defected ground structures for S-band applications. The proposed LPF structure was comprised of dumbbell shaped interdigital defected ground structures and open stubs as series inductor and shunt capacitor in the pass band. In addition, an equivalent circuit model was derived and optimized to achieve a 3-dB cut