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


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$0^{\circ}C$.


LO;Phase Noise;Ka-band Transponder


  1. 한국전자파학회논문집 v.12 no.4 낮은 위상잡음을 갖는 위성중계기용 Engineering Model 발진기의 비선형 설계 이문규;류근관;염인복;이성팔
  2. IEEE MTT-S Digest A Low Cost 16.2GHz Phase Locked Oscillator for Wireless LAN T. A. Bos;F. Bayer;U. Lott
  3. Aerospace Applications Conference Digest An electronically tuned, stable 8415MHz dielectric resonator FET oscillator for space applications N. R. Mysoor
  4. Applied Microwave and Wireless no.Summer Stable X-band local oscillator E. A. Craig;J. E. Mulholland
  5. IEEE MTT-S Digest A Comparison of the Performance of Three Different Phase Locked Phase locked Oscillator Fabricated at 21GHz J. Perez;P. Dorta;F. Sierra
  6. Proceedings of the 1997 IEEE Frequency Control International Symposium Phase locked DRO/CRO for space use B. Hitch;T. Holden
  7. ETRI Journal v.23 no.4 Phase noise reduction of microwave HEMT oscillators using a dielectric resonator coupled by a high impedance inverter M. Q. Lee;K. K. Ryu;I. B. Yom