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Active-amplifier-array diagnostics using high-resolution electrooptic field mapping

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8 Author(s)
Kyoung Yang ; Dept. of Electr. Eng. & Comput. Sci., Michigan Univ., Ann Arbor, MI, USA ; Marshall, T. ; Forman, M. ; Hubert, J.
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Several Ka-band spatial-amplifier power combiners and their free-space feeds were characterized using a high-resolution extreme-near-field electrooptic measurement technique. The two-dimensional electric-field amplitude and phase maps obtained from several arrays are presented. The usefulness of the technique for diagnostic purposes during the design and prototyping stages of the active arrays is discussed. In particular, the electrooptic maps were shown to be valuable for making improvements in the bias line design in one case, and for isolating faulty unit cells in another case

Published in:

Microwave Theory and Techniques, IEEE Transactions on  (Volume:49 ,  Issue: 5 )

Date of Publication:

May 2001

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