This paper presents a low‐insert loss and high‐return loss bandpass filter (BPF). The proposed BPF consists of cut‐off rectangular waveguides and capacitive irises, showing an extremely low insert loss and a high return loss at 7.85‐8.5 GHz in the bandpass frequency range. The insert loss is less than 0.203 dB, the return loss is better than 30 dB and the attenuation exceeds 40 dB at 7.3 GHz and 9.05 GHz. Moreover, the fractional bandwidth of proposed BPF is 7.95%. The validity of the device was tested by comparison among experimental and simulation data; the results suggest that it is in satellite communication systems.

中文翻译：

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基于截止矩形波导的低插入损耗和高回波损耗带通滤波器，用于卫星通信应用

本文提出了一种低插入损耗和高回波损耗带通滤波器（BPF）。拟议的BPF由截止矩形波导和电容性光圈组成，在带通频率范围内，在7.85-8.5 GHz频率范围内，插入损耗极低，回波损耗极高。在7.3 GHz和9.05 GHz时，插入损耗小于0.203 dB，回波损耗优于30 dB，衰减超过40 dB。此外，建议的BPF的分数带宽为7.95％。通过比较实验数据和仿真数据测试了该设备的有效性。结果表明它在卫星通信系统中。