2019 Technical Papers

Proposed Changes and Updates on IEEE Std 1128 - Recommended Practice on Absorber Evaluation

Authors: Zhong Chen, Vince Rodriguez
Publication: AMTA 2019
Copyright Owner: NSI-MI Technologies

Abstract — The last published version of the IEEE Std 1128 is the 1998 edition. It is titled “Recommended Practice for RF Absorber Evaluation in the Range of 30 MHz to 5 GHz”. Over the years, the document has been used widely for absorber evaluations in electromagnetic compatibility (EMC) applications as well as in antenna and microwave measurement applications. Besides the obvious frequency range which needs to be expanded to satisfy today’s applications, several areas are in need of an update. The proposed document will change the upper frequency limit to 40 GHz (with provisions in the document to potentially extend above 40 GHz based on test methods). Measurement uncertainties were not discussed in the IEEE Std. 1128 – 1998. In the new edition, measurement instrumentation and test methods are expected to be updated with guidance on estimating measurement uncertainties. In the proposed document, a section on absorber evaluations for high power applications is planned, and fire properties and test methods will be included.

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