论文信息 - 140GHz waveguide H ladder bandpass filter

140GHz waveguide H ladder bandpass filter

A low insertion loss 140GHz rectangular waveguide H ladder bandpass filter is presented in this paper. The filter is synthesized by 7-pole Chebyshev filtering function and simulated by mode matching method. It is fabricated based on micrometer precision high speed CNC milling machines. The measured center frequency is 139.2GHz. The 3dB bandwidth is 11.6GHz, 8.3%. The minimum insertion loss is -1.0dB. The passband return loss is lower than -16.4dB. The stopband rejection is -48.1dB at 130GHz.

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