Research on terahertz frequency division technique applied to microsatellite platform
Received:May 18, 2018  Revised:March 28, 2019  download
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Author NameAffiliationE-mail
WANG Jing National Space Science Center, Chinese Academy of Sciences 
ZHANG Sheng-Wei National Space Science Center, Chinese Academy of Sciences  
MENG Jin National Space Science Center, Chinese Academy of Sciences  
Abstract:Based on microsatellite constellation, meteorological forecast has been greatly improved in terms of temporal and spatial resolution. To separate frequency in RF front-end system of the microsatellite atmospheric microwave sounder, a waveguide diplexer with compact size and low insertion loss is adopted. A 166/183GHz diplexer is designed using equivalent circuit method and mode-matching technology. According to the actual situation of machining, the effects of iris steepness and iris thickness on the performance of diplexer are analyzed in simulation. Through the analysis of the split-block realization and the machining defects, the way of machining is continuously optimized to obtain a satisfactory machining sample. Maximum measured insertion loss is 1.5dB, and minimum measured return loss is 15dB. Measured out-band rejection is higher than 27dB. Good agreement between simulation and measurement has validated the feasibility of designing method.
keywords:microsatellites, terahertz frequency division technique, waveguide diplexer, mode-matching technology, experimental analysis
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Copyright:《Journal of Infrared And Millimeter Waves》