A novel reconfigurable circular microstrip G-slotted antenna having a circularly defected ground structure (DGS) capable of switching its resonance frequency for several microwave applications is presented in this paper. Reconfigurability of the proposed G-slot antenna is obtained by incorporating three PIN diodes. One diode is embedded in the patch and two diodes are integrated into the DGS structure at appropriate places in the slot to achieve four different wireless applications such as aeronautical radio navigation (4.3 GHz with gain 3.6 dB), satellite communication (3.78 GHz with gain 3.7 dB), mobile communication (4.55 GHz with gain 4.0 dB), and WiMAX (3.35 GHz with gain 3.3 dB). These four bands are achieved depending on the different biasing conditions of the three PIN switches used. Antenna performance has been analyzed in ANSYS Electronics Desktop 2018.2 software. The equivalent circuit component of the switching element (PIN diode) has been considered and designed during the simulation. The creative structure lies in the way that it exhibits higher gain with compact size than the previously reported similar antenna. A prototype of the proposed patch antenna has been fabricated on a Roger substrate and its testing and measurement have been performed to demonstrate its desirable characteristics and features.

本文提出了一种新型可重构圆形微带 G 槽天线，具有圆形缺陷接地结构 (DGS)，能够为多种微波应用切换其谐振频率。所提出的 G 槽天线的可重构性是通过合并三个 PIN 二极管来实现的。贴片中嵌入一个二极管，插槽中适当位置的 DGS 结构中集成两个二极管，以实现四种不同的无线应用，例如航空无线电导航（4.3 GHz，增益 3.6 dB）、卫星通信（3.78 GHz，增益 3.7 dB）、移动通信（4.55 GHz，增益 4.0 dB）和 WiMAX（3.35 GHz，增益 3.3 dB）。这四个频带的实现取决于所使用的三个 PIN 开关的不同偏置条件。天线性能已在 ANSYS Electronics Desktop 2018.2 软件中进行了分析。仿真过程中考虑并设计了开关元件（PIN二极管）的等效电路元件。其创造性结构在于，与之前报道的类似天线相比，它在尺寸紧凑的情况下表现出更高的增益。所提出的贴片天线的原型已在 Roger 基板上制造，并进行了测试和测量以证明其理想的特性和功能。