Overview:
The non-linear behavior of some balanced amplifiers can be accurately measured using single-ended measurements; other amplifiers require true-mode drive to give correct differential and common-mode results. This paper describes, for the first time, a complete solution to the problem of true-mode measurements. The system makes use of a dual-source vector network analyzer (VNA) to produce either pure-differential or pure-common-mode drives in both the forward and reverse direction. Drive signal errors due to mismatch between the VNA and the device-under-test (DUT) are corrected, as well as a method to provide full balanced error correction to all terms. It is remarkable that small modifications to the standard single-ended 4-port calibration provides all the required error terms.
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Who should view this webcast?
This webcast is intended for RF and Microwave Design Engineers working with balanced devices.
Presenter:
Joel Dunsmore
Since graduating from Oregon State University with a BSEE (1982) and an MSEE (1983), Joel Dunsmore has worked for Agilent Technologies at the Sonoma County Site. He received his Ph.D. from Leeds University in 2004. He is a senior design engineer working for the Component Test Division. He was a principle contributor to the HP 8753 and PNA family of network analyzers, responsible for RF and Microwave circuit designs in these products. Recently, he has worked in the area of non-linear test including differential devices, and mixer measurements. He has received 20 patents related to this work, has published numerous articles on measurement technology, as well as consulting on measurement applications. He has taught electrical circuit fundamentals at the local university, and presented several short courses and seminars through ARFTG, MTT, EMC, and Agilent.
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