A broadband millimeter-wave sub-harmonic mixer using microstrip passive circuits
Received:March 13, 2020  Revised:January 07, 2021  download
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Author NameAffiliationE-mail
XU Jie State Key Laboratory of Millimeter Waves Southeast University. Nanjing 210096 China
Purple Mountain Laboratories Nanjing 211111 China 
xu_jie@seu.edu.cn 
XU Zheng-Bin State Key Laboratory of Millimeter WavesSoutheast UniversityNanjing 210096China  
GUO Jian State Key Laboratory of Millimeter WavesSoutheast UniversityNanjing 210096China  
QIAN Cheng State Key Laboratory of Millimeter WavesSoutheast UniversityNanjing 210096China cqian@seu.edu.cn 
ZHAO Di-Xian National Mobile Communication Research Laboratory Southeast University. Nanjing 210096 China
Purple Mountain Laboratories Nanjing 211111 China 
 
Abstract:This paper presents a millimeter-wave microstrip-based sub-harmonic mixer with a wide operation band. In this design, frequency suppression circuits including a wideband bandpass short-circuited filter and a diplexer are employed not only to provide proper terminations for the intermediate frequency (IF), radio frequency (RF), and local oscillator (LO) signals simultaneously, but also to 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. Meanwhile, the conversion loss is less than 12.5 dB for both up- and down- conversion throughout the bandwidth, in which, 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-harmonic mixer  microstrip  broadband
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Copyright:《Journal of Infrared And Millimeter Waves》