A broadband millimeter-wave sub-harmonic mixer using microstrip passive circuits
Received:March 13, 2020  Revised:June 04, 2020  download
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Author NameAffiliationE-mail
Xu Jie National Mobile Communication Research Laboratory,Southeast University Nanjing xu_jie@seu.edu.cn 
Xu Zhengbin State Key Laboratory of Millimeter Waves,Southeast University  
Guo Jian State Key Laboratory of Millimeter Waves,Southeast University  
Qian Cheng State Key Laboratory of Millimeter Waves,Southeast University cqian@seu.edu.cn 
Zhao Dixian National Mobile Communication Research Laboratory,Southeast University Nanjing  
Abstract:This paper presents a millimeter-wave microstrip sub-harmonic mixer with broad operation band. Frequency suppression circuits including a wideband bandpass short-circuited filter and a diplexer are employed in the sub-harmonic mixer to provide proper terminations for the intermediate frequency (IF), radio frequency (RF), and local oscillator (LO) signals simultaneously, at the same time, reject the major idle mixing products. The measured results show that the proposed sub-harmonic mixer can support the operations in RF band from 27 to 48 GHz, and in IF band up to 6 GHz. The conversion loss is less than 12.5 dB for both up- and down- conversion. The minimum conversion loss is about 7.5 dB and 8.2 dB for the down-conversion and up-conversion, respectively, at an RF of 33 GHz and IF of 1 GHz.
keywords:millimeter-wave, sub-harmnic  mixer, microstrip, broadband
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Copyright:《Journal of Infrared And Millimeter Waves》