Choosing the Best Method for mmWave De-Embedding

As higher frequency mmWave measurements are increasingly needed, there is a corresponding need for robust de-embedding techniques to reach device-under-test (DUT) reference planes accurately and to account for fixture, radiator and launcher behaviors. While most lower frequency techniques still work in principle, connection repeatability becomes much more of a challenge at higher frequencies, and greater bandwidths are available as well, so optimal techniques may change. This article examines some popular choices and experimentally looks at performance in some WR5 fixtures from 140 to 220 GHz.