J Korean inst Electromagn Sci Search


J. Electromagn. Eng. Sci > Volume 10(1); 2010 > Article
Journal of the Korean Institute of Electromagnetic and Science 2010;10(1):25-27.
DOI: https://doi.org/10.5515/JKIEES.2010.10.1.025   
Gain and Phase Mismatch Calibration Technique in Image-Reject RF Receiver
Mi-Young Lee, Chang-Sik Yoo
Devision of Electronics & Computer Engineering, Hanyang University Seoul
This paper presents a gain and phase mismatch calibration technique for an image-reject RF receiver. The gain mismatch is calibrated by directly measuring the output signal amplitudes of two signal paths. The phase mismatch is calibrated by measuring the output amplitude of the final IF output at the image band. The calibration of the gain and phase mismatch is performed at power-up, and the normal operation of the RF receiver does not interfere with the mismatch calibration circuit. To verify the proposed technique, a 2.4-GHz Weaver image-reject receiver with the gain and phase mismatch calibration circuit is implemented in a 0.18-${mu}m$ CMOS technology. The overall receiver achieves a voltage gain of 45 dB and a noise figure of 4.8 dB. The image rejection ratio(IRR) is improved from 31 dB to 59.76 dB even with 1 dB and $5^{circ}$ mismatch in gain and phase, respectively.
Key words: Weaver Image-Reject Receiver, Gain Mismatch Cancellation, Phase Mismatch Cancellation, Negative Feedback Loops, Image-Rejection Ratio(IRR), CMOS
Share :
Facebook Twitter Linked In Google+
METRICS Graph View
  • 1 Crossref
  • 1,599 View
  • 17 Download
Related articles in JEES


Browse all articles >

Editorial Office
#706 Totoo Valley, 217 Saechang-ro, Yongsan-gu, Seoul 04376, Korea
Tel: +82-2-337-9666    Fax: +82-2-6390-7550    E-mail: admin-jees@kiees.or.kr                

Copyright © 2023 by The Korean Institute of Electromagnetic Engineering and Science.

Developed in M2PI

Close layer
prev next