Journal of electromagnetic engineering and science

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
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An MMIC Broadband Image Rejection Downconverter Using an InGaP/GaAs HBT Process for X-band Application

  • Lee Jei-Young (Department of Electronic Engineering, Kwangwoon University) ;
  • Lee Young-Ho (Department of Electronic Engineering, Kwangwoon University) ;
  • Kennedy Gary P. (Department of Electronic Engineering, Kwangwoon University) ;
  • Kim Nam-Young (Department of Electronic Engineering, Kwangwoon University)
  • Published : 2006.03.01
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Abstract

In this paper, we demonstrate a fully integrated X-band image rejection down converter, which was developed using InGaP/GaAs HBT MMIC technology, consists of two single-balanced mixers, a differential buffer amplifier, a differential YCO, an LO quadratue generator, a three-stage polyphase filter, and a differential intermediate frequency(IF) amplifier. The X-band image rejection downconverter yields an image rejection ratio of over 25 dB, a conversion gain of over 2.5 dB, and an output-referred 1-dB compression power$(P_{1dB,OUT})$ of - 10 dBm. This downconverter achieves broadband image rejection characteristics over a frequency range of 1.1 GHz with a current consumption of 60 mA from a 3-V supply.

Keywords

References

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