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학술지 4-20 GHz GaAs True-Time Delay Amplifier MMIC
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저자
신동환, 염인복, 김동욱
발행일
201712
출처
IEEE Microwave and Wireless Components Letters, v.27 no.12, pp.1119-1121
ISSN
1531-1309
출판사
IEEE
DOI
https://dx.doi.org/10.1109/LMWC.2017.2763754
협약과제
17JR1200, MMIC 기반 X-band GaN SSPA 상세설계 및 인증, 염인복
초록
A wideband amplifier with a fine control of the true-time delay (TTD) has been successfully implemented using a commercial 0.5-챙m GaAs pHEMT monolithic microwave integrated circuit (MMIC) process. The proposed circuit effectively combines switching elements into an artificial transmission line structure in a distributed amplifier to achieve an adjustable TTD which enables time delay control with gain in a wider band than other GaAs-based TTD circuits. The TTD amplifier MMIC achieves a controllable delay of 9 ps, a gain of 9 to 2 dB, and a typical return loss of more than 10 dB from 4 to 20 GHz. The proposed TTD amplifier can be effectively integrated into a multifunction chip based on GaAs semiconductors for wideband active electronically scanned array or phased array systems.
KSP 제안 키워드
Active electronically scanned array(AESA), Distributed amplifier(DA), Fine control, GaAs pHemt, Microwave monolithic integrated circuits(MMIC), Phased array systems, Return loss(RL), Switching element, Time Delay Control, artificial transmission line, microwave integrated circuit