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학술지 Technique for fast triangular chirp modulation in FMCW PLL
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저자
최한길, 이상흥, 조성환
발행일
202207
출처
IEICE Electronics Express, v.19 no.14, pp.1-4
ISSN
1349-2543
출판사
일본, 전자정보통신학회 (IEICE)
DOI
https://dx.doi.org/10.1587/elex.19.20220214
협약과제
21NU1200, 거리해상도 개선을 위해 PLL을 적용한 1000 MHz 이상의 대역폭을 가지는 근접센서용 94 GHz 대역 SiGe 기반 Packaged Transceiver 칩 개발, 이상흥
초록
Frequency-modulated continuous-wave (FMCW) radars necessitate fast frequency modulation. However, finite loop bandwidth of a phase-locked loop (PLL) limits the accuracy of fast frequency modulation. This paper proposes a phase compensation (PC) technique to address this limitation. The synthesizer PLL with the PC technique realizes fast and precise triangular chirp modulation by adding a compensating square wave phase before the integral path of the loop filter. The synthesizer is designed in 130-nm SiGe BiCMOS technology. Simulation results show rms frequency error improvement of 18 times over conventional PLL with a chirp bandwidth of 2.56GHz and 20 μs chirp period at 94 GHz.
KSP 제안 키워드
130-nm SiGe BiCMOS, 94 GHz, Chirp modulation, Frequency modulated continuous wave (FMCW) radar, Frequency-modulation(FM), Phase locked loop(PLL), SiGe BiCMOS technology, continuous wave(CW), frequency error(FE), loop bandwidth, loop-filter(LF)