PIM – Passive Intermodulation

PIM: Components, Material, Handling and Testing

by: AWT Global
This issue of  “Wireless Pages” 04/14 talks about connector surface material, why it is so important for PIM. It also offers hints how to treat low PIM components without damaging them. Three complementary ways of testing low PIM installations and components are provided. Click here for the pdf publication.

Connector Surfaces – Influence on PIM – Skin Effect

by: AWT Global
Connector surfaces look nice and smooth. The picture changes however dramatically under the microscope. Also, at high frequencies virtually all of the current density happens in the plating of a connector. The conductor core is basically current free. Click here for article.

Correct Handling of Low PIM Components

by: AWT Global
Wrong handling of low PIM components can lead to performance degradation of even permanent damage. This article provides some tips how to treat them and prevent issues.  Click here for the article.

Importance of Connector Saver for PIM Test Equipment

by: AWT Global
Often neglected but of utmost importance to maintain full performance of PIM equipment, the connector saver. The article explains why it is so important. Click here for the article.

Testing PIM Installations and Components

by: AWT Global
Testing thoroughly for PIM issues requires three PIM tests: Static Test, Wiggle Test and Tap Test. The article explains how it is done and what issues every test will uncover.  Click here for the article.

About PIM: Forward PIM, Reverse PIM, Residual PIM

by: AWT Global
The publication explains differences between forward PIM and reverse PIM. Examples are given when to use reverse PIM, when it is beneficial to measure both, reverse and forward PIM. Furthermore, the publication explains the function of a PIM analyzer of and discusses residual PIM. Click here for the publication.

PIM for Tower Crews and Installers

by: OnPoint Testing Services
Briefing on PIM for hands-on crews. Explaining PIM and how to avoid it. Click here for the paper.

Intermodulation Tables

by: AWT Global
The tables show intermodulation products IM3, IM5, IM7 and IM9 of different carriers. The coloring represents intermodulation products that fall either in the  proprietary band or in another band. The latter can be a serious issue with neutral host systems. Click here for the tables.

Passive Intermodulation Distortion in Coaxial Connectors

by: Purdue University
Whitepaper on coaxial connectors and passive intermodulation (PIM). Coaxial connectors are frequently the dominant contributors to passive intermodulation distortion. The paper reports modelling PIM in microwave networks. Click here for the white paper.

Hard time for RF cables

by: Santron
A Santron engineer is giving one of their cables a hard time. Measured with AWT PIM test system. Click here for the YouTube video clip.