Optimal Fixture Design with End-Launch SMA Connectors
End-launch SMA or 3.5mm connectors are commonly used to create test boards for various devices. The connectors are attached to the edge of the circuit board, and micro-strip or co-planar waveguide traces are routed from them to the Device Under Test (DUT). Some form of de-embedding can be performed if extraction of DUT-only characteristics is necessary. The frequency range of the AFR characterization must stop before any resonances, as these impair the de-embedding process.
This article is intended to provide guidance for the successful design of a broadband test fixture using end-launch connectors. Much work has already been published on this subject, thus this paper will merely summarize that work and provide practical guidance.
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