상세정보
학술지
Technique for fast triangular chirp modulation in FMCW PLL
- 저자
- 최한길, 이상흥, 조성환
- 발행일
- 202207
- 출처
- IEICE Electronics Express, v.19 no.14, pp.1-4
- ISSN
- 1349-2543
- 출판사
- 일본, 전자정보통신학회 (IEICE)
- 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), SiGe BiCMOS technology, continuous wave(CW), frequency error(FE), loop bandwidth, loop-filter(LF), phase compensation