Analysis and Optimization of Passive Intermodulation in Microwave Coaxial Cavity Filters

ETRI Journal

关键词: Cavity filter;    Filter;    PIM;    Passive Intermodulation;   

Others  :  1184871
DOI  :  10.4218/etrij.03.0102.0214

【 摘 要 】

We studied how the passive intermodulation (PIM) power arising in air cavity filters could be calculated and how the design of the filter could be optimized in order to reduce the amplitude of the PIM signal. To do this, using simulated results, we optimized the various parameters of a filter. PIM in an air cavity filter depends on the power dissipated in its cavities. A reduction of this power loss therefore decreases the PIM power in the air cavity filter. Our experimental results confirm that it is possible to design and produce air cavity filters that generate low PIM signals.

   

【 参考文献 】

• [1]B.G.M. Helme, Passive Intermodulation of ICT Components, The Institution of Electrical Engineers, 1998.
• [2]Byung-Jun Jang, In-Bok Yom, and Seong-Pal Lee, "Millimeter Wave MMIC Low Noise Amplifiers Using a 0.15 μm Commercial pHEMT Process," ETRI J., vol. 24, no. 3, June 2002, pp. 190-196.
• [3]G.H. Schennum and G. Rosati, "Minimizing Passive Intermodulation Product Generation in High Power Satellites,"IEEE Proc. of Aerospace Applications Conf., vol. 3, 1996, pp. 155-164.
• [4]Jin Tae Kim, In-Kui Cho, Myung Yung Jeong, and Tae-Goo Choy, "Effect of External PIM Sources on Antenna PIM Measurements," ETRI J., vol. 24, no. 6, Dec. 2002, pp. 435-442.
• [5]P. Bolli, S. Selleri, and G. Pelosi, "Passive Intermodulation on Large Reflector Antennas," IEEE Antennas and Propagation Magazine, vol. 44, Oct. 2002, pp.13-20.
• [6]F. Arazm and F.A. Benson, "Nonlinearities in Metal Contacts at Microwave Frequencies," IEEE Trans. on Electromagnetic Compatibility, vol. EMC-22, no. 3, Aug. 1980, pp. 142-149.
• [7]B. Deats and R. Hartman, "Measuring the Passive-IM Performance of RF Cable Assemblies," Microwave & RF, Mar. 1997, pp. 108-114.
• [8]J.Z. Wilcox and P. Molmud, "Thermal Heating Contribution to Intermodulation Fields in Coaxial Waveguides," IEEE Trans. on Communications, Feb. 1976, pp. 238-243.
• [9]G.L. Matthaei, L. Young, and E.M. Jones, Microwave Filters, Impedance Matching Networks and Coupling Structures, Dedham, MA, Artech, 1980.
• [10]J.H. Kim, S.K. Han, K.Y. Kang, and D. Ahn, "Temperature Dependence of Microwave Properties of HTS Multipole Lowpass Filters Consisting of Microstrip Open-Stub Lines," ETRI J., vol. 19, no. 2, July 1997, pp. 48-58.
• [11]G.H. Stauss, Intrinsic Sources of IM Generation, NRL Memorandum Report 4233, 1980.
• [12]G.C. Liang, D. Zhang, and C.F. Shih, "High-Power HTS Microstrip Filters for Wireless Communication," IEEE Trans. on Microwave Theory and Techniques, vol. 43, no. 12, Dec. 1995, pp. 3020-3029.