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학술지 K-Band Phase Discriminator Using Multiport Downconversion for Monopulse Tracker
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저자
문성모, 염인복, 이한림
발행일
201706
출처
IEEE Microwave and Wireless Components Letters, v.27 no.6, pp.599-601
ISSN
1531-1309
출판사
IEEE
DOI
https://dx.doi.org/10.1109/LMWC.2017.2701331
협약과제
17HR2800, 차기위성 Flexible 통신방송 탑재체 핵심기술 개발, 장동필
초록
In this letter, K-band phase discriminator based on multiport downconversion for monopulse tracking system is presented. The proposed architecture adopts multiple six-port junctions to individually process elevation and azimuth difference signals delivered from a multibeam antenna feed network. To produce accurate 2-D angular information, elevation and azimuth difference channel path calibration by reflection-type phase shifters and attenuators are also used. The proposed hybrid multiport junction was implemented with microstrip passive circuits and GaAs monolithic microwave integrated circuits. The performance was verified at the satellite downlink frequency of 20 GHz by successful generations of quadrature I/Q signals according to elevation or azimuth difference signal variations.
KSP 제안 키워드
Angular information, Antenna Feed, Difference channel, Difference signal, Feed network, K-band, Microwave monolithic integrated circuits(MMIC), Monopulse tracking, Multi-beam antenna, Path Calibration, Phase Shifter