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

• 作者: Tawfik Elsayed Khattab
• 来源期刊: 通讯、网络与系统学国际期刊(英文)
• 学科: 医学
• 关键词: Passive INTERMODULATION PIM Nonlinear Polar Dielectric HARMONICS Cavity RESONATOR
• 年，卷（期）: 2015,（2）
• 页码范围: 11-18
• 页数: 8页
• 分类号: R73

摘要

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.