Journal of the Korean Institute of Telematics and Electronics (대한전자공학회논문지)

The Institute of Electronics and Information Engineers (대한전자공학회)
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A Study on Microwave Self Oscillating Mixer Using Ga As MESFET

GaAs MESFET를 이용한 초고주파 자체발진 혼합기에 관한 연구

  • Kwon, Dong Seung (Dept. of Elec. Eng., Yonsei Univ.) ;
  • Chae, Jong Seok (Radio Propagation Studies Section, ETRI) ;
  • Park, Han Kyu (Dept. of Elec. Eng., Yonsei Univ.)
  • 권동승 (연세대학교 전자공학과) ;
  • 채종석 (전자통신연구소 전파기술 개발실) ;
  • 박한규 (연세대학교 전자공학과)
  • Published : 1987.03.01
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Abstract

In this paper, self-oscillating mixer is designed by small signal S-parameter and series feedback circuit. The input-output matching circuit is accomplished from double stub and additional matching stub. The self-oscillating mixer is oscillating itself and amplifies without any external local oscillator and an intermediate frequency amplifier, so it has advantages in its economical and system simplification. The experimental results show the maximum conversion gain 1.5d B and the noise figure 6.5d B at RF center frequency 4GHz and IF 1.1GHz` output oscillating power 4d Bm, efficiency 13.4%, stability -10MHz/V and -0.5MHz/\ulcornerC at oscillating frequency 5.1GHz.The rejection band loss characteristics in band pass filter and low pass filter are -40d B and -30d B, respectively.

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