Design of Local Oscillator with Low Phase Noise for Ka-band Satellite Transponder

Ka-band 위성 중계기용 저위상잡음 국부발진기의 설계 및 제작

  • 류근관 (한국전자통신연구원 통신위성개발센터) ;
  • 이문규 (한국전자통신연구원 통신위성개발센터) ;
  • 염인복 (한국전자통신연구원 통신위성개발센터) ;
  • 이성팔 (한국전자통신연구원 통신위성개발센터)
  • Published : 2002.07.01

Abstract

The EM(Engineering Model) LO(Local Oscillator) is designed for Ka-band satellite transponder. The VCO(Voltage Controlled Oscillator) is implemented using a high impedance inverter coupled with dielectric resonator to improve the phase noise performance out of the loop bandwidth. The phase of VCO is locked to that of a stable OCXO(Oven Controlled Crystal Oscillator) by using a SPD(Sampling Phase detector) to improve phase noise performance in the loop bandwidth. This LO exhibits the harmonic rejection characteristics above 43.83 dBc and requires 15 V and 160 mA. The phase noise characteristics are performed as -102.5 dBc/Hz at 10 KHz offset frequency and -104.0 dBc/Hz at 100 KHz offset frequency, respectively, with the output power of 13.50 dBm$\pm$0.33 dB over the temperature range of -20~+7$0^{\circ}C$.

Keywords

LO;Phase Noise;Ka-band Transponder

References

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