This paper proposes an improved approach for designing a compact microstrip line-based band stop filter (BSF) using a new Z-shaped complementary electrical LC (CELC) resonator with negative permeability. The design offers advantages in terms of compactness and large stopband. The measured insertion loss exhibits a 3 dB bandwidth from 6.7 to 9 GHz, resulting in a relative stopband bandwidth of 28.75% with rejection exceeding 20 dB between 7.5 and 8.2 GHz. Both the simulation and the measurements reveal a high level of selectivity in both the lower and upper transition bands. The final filter has 0.33 circuit size and is very effective in rejecting unwanted frequency in terms of its selectivity and size.

中文翻译：

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采用互补电 LC 谐振器实现的负磁导率的宽带阻滤波器

本文提出了一种改进的方法，使用具有负磁导率的新型 Z 形互补电 LC (CELC) 谐振器来设计紧凑型微带线带阻滤波器 (BSF)。该设计在紧凑性和大阻带方面具有优势。测量的插入损耗在 6.7 至 9 GHz 范围内表现出 3 dB 带宽，导致相对阻带带宽为 28.75%，在 7.5 至 8.2 GHz 范围内抑制超过 20 dB。模拟和测量都揭示了下过渡带和上过渡带的高水平选择性。最终滤波器的电路尺寸为 0.33，在选择性和尺寸方面非常有效地抑制不需要的频率。