상세정보
학술대회
A 5.8 GHz SiGe HBT Direct-Conversion I/Q-Channel Sub-armonic Mixer for Low Power and Simplified Receiver Architecture
- 저자
- 최병건, 박철순
- 발행일
- 200506
- 출처
- IEEE MTT-S International Microwave Symposium 2005, pp.177-180
- 협약과제
- 05MB2900, 초저전력 RF/HW/SW 통합 SoC, 박성수
- 초록
- This paper presents a novel SiGe HBT subharmonic direct-conversion mixers for C-band wireless LAN application. The proposed down conversion mixer consists of single level I/Q-channel mixers and 90째 phase shifters for each RF and LO input. Since the proposed sub-harmonic mixer requires only single ended RF and LO signal sources for generating I/Q base-band signals, the RF front-end can be greatly simplified compared to the fully differential RF front-end architecture from LNA and VCO to mixer. The measured conversion gain and input PI dB are 13.6 dB and -15 dBm, respectively at 5.8 GHz RF signal and 2.9 GHz LO signal. I/Q mismatches caused by LO and RF 90째 phase shifters and I/Q-channel mixers are less than 5째 and 0.5 dB in phase and amplitude mismatches. Each I/Q-channel sub-harmonic mixer consumes 6.2 mA from a 2.7 V supply. © 2005 IEEE.
- KSP 제안 키워드
- 5.8 GHz, C-band, Conversion gain, Direct Conversion, Down-conversion mixer, Fully differential, Low-Power, Phase Shifter, RF front end, RF signal, Receiver architecture