Analysis and Calculation of PIM at Microwave Waveguide Flange MM Structure

ZHANG Shu-e; CAO Xiao-ya

doi:10.13756/j.gtxyj.2018.01.013

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Analysis and Calculation of PIM at Microwave Waveguide Flange MM Structure

- Analysis and Calculation of PIM at Microwave Waveguide Flange MM Structure
- Study on Optical communication Issue 1, Pages: 48-51(2018)
- 作者机构：
  
  华北电力大学电子与通信工程系
- 作者简介：
- 基金信息：
- DOI：10.13756/j.gtxyj.2018.01.013
  CLC： TN814
- Published：2018，
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[1]张淑娥,曹晓亚.微波波导法兰MM结构PIM的分析与计算[J].光通信研究,2018(01):48-51.

ZHANG Shu-e, CAO Xiao-ya. Analysis and Calculation of PIM at Microwave Waveguide Flange MM Structure. [J]. (1):48-51(2018)
[1]张淑娥,曹晓亚.微波波导法兰MM结构PIM的分析与计算[J].光通信研究,2018(01):48-51. DOI： 10.13756/j.gtxyj.2018.01.013.

ZHANG Shu-e, CAO Xiao-ya. Analysis and Calculation of PIM at Microwave Waveguide Flange MM Structure. [J]. (1):48-51(2018) DOI： 10.13756/j.gtxyj.2018.01.013.

摘要

随着载波功率不断提高及通信设备精巧化的发展趋势

无源器件固有的非线性会引起严重的无源互调（PIM）干扰

由此产生的影响不可忽略。针对此现象

以微波矩形波导为研究对象

考虑PIM的主要产生机理:量子隧穿效应和热电子发射效应

在波导法兰金属—金属（MM）接触模型的基础上

提出一种计算PIM功率的方法。将两种非线性效应用隧穿电阻Rnlc的I-V特性来表示

运用谐波平衡仿真和Matlab软件进行交流仿真

分析并计算流经隧穿电阻的非线性电流、其两端的压降以及波导连接中的PIM功率。结果表明

采用此方法计算得到的PIM功率随接触压力的增大先是明显下降

当压力达到一定值后

下降变缓慢且逐渐趋于平衡状态。

Abstract

With the increase of carrier power

the development trend of sophisticated communication equipment

the inherent non-linearity of passive components will cause serious Passive Inter-Mmodulation（PIM）interference

where the resulting impact can not be ignored.In view of this phenomenon

the microwave rectangular waveguide is taken as the research object

considering the main mechanism of PIM:quantum tunneling effect and hot electron emission effect.Based on the contact model of the waveguide flange Metal-Metal（MM）

a method of calculating the PIM power is proposed.The two non-linear effects are represented by the I-Vcharacteristics of the tunneling resistor Rnlc

using harmonic balance simulation and Matlab software for AC simulation.The non-linear current flowing through the tunneling resistor and the voltage drop at both ends and the PIM power in the waveguide connection are analyzed and calculated.The results show that the calculated PIM power varies with the contact pressure.The value of PIM power drops significantly at first with the increase of pressure.Then the value of PIM power declines slowly when further increasing the pressure and reaches a balanced state finally.

关键词

无源互调金属—金属接触非线性无源互调功率

Keywords

passive inter-modulationMM contactnon-linearityPIM power

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Wuhan Research Institute of Posts and Telecommunications

武汉邮电科学研究院湖北武汉　430074

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