Title :
Passive intermodulation considerations in antenna design
Author_Institution :
Huber & Suhner AG, Herisau, Switzerland
fDate :
June 28 1993-July 2 1993
Abstract :
The author outlines the causes of PIM (passive intermodulation) measurement techniques, and proven means of PIM reduction. Material and geometry considerations are examined. It is pointed out that PIM is an important consideration in high-channel-capacity communications systems. Ferrite materials and geometries with high current densities show particularly poor PIM performance. Environmental effects often degrade PIM performance. Although results are difficult to quantify, it is concluded that heeding a few basic design recommendations will decrease PIM levels.<>
Keywords :
channel capacity; current density; environmental degradation; ferrite devices; interference suppression; intermodulation measurement; microwave antennas; PIM reduction; antenna design; geometry; high-channel-capacity communications systems; passive intermodulation; Channel capacity; Conducting materials; Ferrites; Frequency; Measurement techniques; Microwave devices; Modems; Nickel alloys; Permeability; Power harmonic filters;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1993. AP-S. Digest
Conference_Location :
Ann Arbor, MI, USA
Print_ISBN :
0-7803-1246-5
DOI :
10.1109/APS.1993.385516
