圆形开槽贴片微带双模带通滤波器

Dual-mode bandpass filter using circular patch resonator with tilting rectangular slot

提出了一种新颖、简单的圆形贴片上刻蚀小方槽的微带双模带通滤波器结构。该滤波器仿真的通带中心频率为5.9 GHz,最大回波损耗优于–31.5 dB,通带内最小插入损耗为–0.7 dB,3 dB带宽为23.73%。实测和仿真结果相一致。

A novel simple dual-mode microstrip circular patch bandpass filter with a small rectangle notch was proposed. The central frequency of the filter was 5.9 GHz, the max return loss surpassed -31.5 dB, the minimum insertion was - 0.7 dB in passband and the 3 dB fractional bandwidth was 23.73%. The measurement result is consistent with the software simulation result.