The Effect of High Power at Microwave Frequencies on the Linearity of Non-Polar Dielectrics in Space RF component

Tawfik Elsayed Khattab^*

Department of Electrical Engineering, Engineering College, King Khalid University, Abha, Saudi Arabia.

DOI: 10.4236/ijcns.2015.82002                

Abstract

In satellite communication systems, there are high power multichannel transmitters and wideband receivers that have shared RF antenna transmission lines because of: 1) large power level difference between the transmitted and received signal; 2) limited frequency channels. The harmonics and Passive Intermodulation (PIM) Interference will be generated due to passive non-linearities in the high power transmission path. This can be a serious problem. This paper describes how to determine the signal levels and dominant mechanisms that are associated with non-linear dielectric behavior in this context. A novel measurement system for testing dielectric samples is described and measurement results are provided for commonly used microwave dielectrics.

Keywords

Passive Intermodulation, PIM, Nonlinear, Polar Dielectric, Harmonics, Cavity Resonator

Conflicts of Interest

The authors declare no conflicts of interest.

References

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