Proceedings of the IEEK Conference (대한전자공학회:학술대회논문집)

The Institute of Electronics and Information Engineers (대한전자공학회)
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Design of Broadband Hybrid Mixer using Dual-Gate FET

이중게이트 FET 를 이용한 광대역 하이브리드 믹서 설계

  • Jin, Zhe-Jun (Dept. of Electronics Eng., University of Incheon) ;
  • Lee, Kang-Ho (Dept. of Electronics Eng., University of Incheon) ;
  • Koo, Kyung-Heon (Dept. of Electronics Eng., University of Incheon)
  • Published : 2005.11.26
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Abstract

This paper presents the design of a broadband hybrid mixer using dual-gate FET topology with a low-pass filter which improves return loss of output to isolate RF and LO signal. The low-pass filter shows the isolation whose RF and LO signal is better than 40 dBc at 2 GHz and 5 GHz band. The dual-gate mixer which has been designed by using cascade topology operates when the lower FET is biased in linear region and the upper FET is in saturation. The input matching circuit has been designed to have conversion gain from 2 GHz to 6 GHz. The designed mixer with low-pass filter shows the conversion gain of better than 7 dB from 2 GHz to 6 GHz at a low LO power level of 0 dBm with the fixed IF frequency of 21.4 MHz.

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