Implementation of Waveguide Terminations With Low-Passive Intermodulation for Conducted Test Beds in Backward Configuration

Abstract

This paper proposes a simple way to implement low-passive intermodulation (PIM) terminations in waveguide technology for test beds conceived to evaluate conducted backward PIM. By inserting a dedicated filter before the waveguide termination of the test bench, it is possible to diminish the PIM contribution from the load and consequently reduce the residual PIM noise floor of the test facility. To validate the practical application of this technique, a conducted backward low-PIM setup working in K-band was assembled and tested. An improvement in terms of PIM performance has been obtained through the proposed solution.

A Method for Measuring the Maximum Measurable Gain of a Passive Intermodulation Chamber

“…The novel concept of MMG proposed in this paper is critical for the evaluation of the PIM performance of a chamber for antenna PIM measurements. However, according to our knowledge, the recent research on PIM is mainly focused on analyses of PIM models [21][22][23] and PIM test devices [24][25][26][27]. At present, no one has proposed a similar idea of defining the MMG of the PIM measurement chamber, and thus there is no corresponding method of estimating the MMG.…”