Title :
140GHz waveguide H ladder bandpass filter
Author :
Cheng, Wang ; Bin, Lu ; Jie, Liu ; Xianjin, Deng
Author_Institution :
Terahertz Res. Center, China Acad. of Eng. Phys., Mianyang, China
Abstract :
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.
Keywords :
Chebyshev filters; band-pass filters; computerised numerical control; ladder filters; millimetre wave filters; milling machines; mode matching; rectangular waveguides; waveguide filters; bandwidth 11.6 GHz; frequency 130 GHz; frequency 139.2 GHz; frequency 140 GHz; low insertion loss; micrometer precision high speed CNC milling machines; mode matching method; rectangular waveguide H ladder bandpass filter; seven-pole Chebyshev filtering function; Band pass filters; Couplings; Filtering theory; Frequency measurement; Microwave filters; Resonant frequency; Resonator filters;
Conference_Titel :
Microwave and Millimeter Wave Technology (ICMMT), 2012 International Conference on
Conference_Location :
Shenzhen
Print_ISBN :
978-1-4673-2184-6
DOI :
10.1109/ICMMT.2012.6230109
