The Design of K-band Up converter with the Excellent IMD3 Performance

3차 혼변조 왜곡 특성이 우수한 K-band 상향변환기 설계

  • 정인기 (경남대학교 정보통신공학과) ;
  • 이영철 (경남대학교 정보통신공학과)
  • Published : 2004.08.01


In this paper, we has designed and implemented Up-converter for K-band with high IMD3 performance using balanced power amplifier. It is consisted of PA module and, Local Oscillator module with reject Filter, mixer module and If block, and Up-converter has a local loop path to decide whether it operate or not and has the sensing port to inspect output power level. According to the power budget of designed Up-converter, K-band balanced power amplifier was fabricated by commercial MMIC. Measurement results of up-converter show about 40dB Gain, PldB of 29dBm and OIP3 was 38.25dBm, that is good performance compared to power budgets. We has adjusted gate voltage of MMIC to control more than 30 dB gain. This up-converter was used in transceiver for PTP and PTMP, and applied to digital communication system that use QAM and QPSK modulation.


  1. Hossein Izadpanah, ' A Millimeter-Wave Broadband Wireless Access Technology Demonstrator for the Next-Genaration Internet Network Reach Extension,' IEEE Communication Magazine, pp140-145, Sep. 2001
  2. F. Adachi,' Evolution Broadband Wireless Systems,', IEEE, International Symposium on Wireless Personal Multimedia Communications, pp19-26, Oct. 2002
  3. Rger B. Marks,' The IEEE 802.16 Working Group on Broadband Wireless,' IEEE Network, pp 4-7, March/April 1999
  4. L.Ngoc and V. Leung,' Interactive Multive Satellite Access Comunications,' IEEE Comunication Magazine, pp78-85, July 2003
  5. Y. Rahayu, J. Din and T. Rachman., 'Optimised performance of a 23GHz transceiver system for point-to-point microwave link,' IEEE, International Conference on Communication Systems, Vol.2, pp1162-1165, Nov. 2002
  6. A. Paraboni G.Masjni and A Elia ,'The effect of precipitation on microwave LMDS networks-performance analysis using a physical raincell model,' IEEE Jour. of Selected Areas in Communications, Vol.20, No.3, pp615-619, April 2002
  7. Thomas Merkle, A.Tessmann and S. Ramberger.,'Intercept Point of Ka-band GaAs Gigh Power Amplifiers,' IEEE MTT-S International Microwave Symposium Digest, pp453-456, June 2002
  8. F. Y. Colomb and A Platzker,' 2 and 4 watt Ka-band GaAs PHEMT power amplifier MMICs,' IEEE MTT-S , Microwave Symposium Digest, 2003 International Vol.2, pp843- 846, June 2003
  9. E.Sonmez, A. Trasser, K.B. Schad and H.Schumacher, 'A single-chip 24 GHz receiver front-end using a commercially available SiGe HBT foundry process,' IEEE Radio Frequency Integrated Circuits (RFIC) Symposium, pp159-162 June 2002
  10. C. S. Aitchison, M. Mbabele and F. Ali, 'Improvement of Third-order Intermodulation Product of RF and Microwave Amplifiers by Injection,' IEEE Trans. on Microwave and Technique, Vol. 49, No.6, ppl148-1154, June 2001
  11. Allen Katz,' Linearization Reducing Distortion in Power Amplifiers,' IEEE Microwave magazine Vol.2, No.4, pp37-49, Dec. 2002
  12. M. Faulkner,'Amplifier linearization using RF feedback and feedforward techniques,'IEEE Transactions on Vehicular Technology, Vol.47, No.1, pp209-215, Feb. 1998
  13. A. H. Coskun and S. Demir.,' A mathematical characterization and analysis of a feedforward circuit for CDMA applications,' IEEE Transactions on Microwave Theory and Techniques, Vol.51,pp767-777, No.3, March 2003
  14. I J.A. Sills and R.Sperlich,' Adaptive power amplifier linearization by digital predistortion using genetic algorithms,' IEEE Radio and Wireless Conference, RAWCON, pp229-232, Aug. 2002
  15. Abelardo Podcameni and C.R.Riback.,' An Amplifier Linearization Method based on a Quadrature Balance Structure,' IEEE Trans.on Broadcasting, Vol.48, No.2, pp158-162 June 2002
  16. Thomas P. Weldon and Konrad Miehle.,' Using Amplifiers with Poor Linearity to Linearize Amplifiers with Good Linearity,' IEEE MTT-S Internation Microwave Symposium. pp1741-1743, June 2003
  17. S. Maas, Nonlinear Microwave Circuits, Norwood, MA: Artech House, 1988
  18. Behzad Razavi, RF Microelectronics, Upper Saddle River, NJ, Prentice-Hall, 1998