Active-amplifier-array diagnostics using high-resolution electrooptic field mapping
- Resource Type
- Periodical
- Authors
- Yang, K.; Marshall, T.; Forman, M.; Hubert, J.; Mirth, L.; Popovic, Z.; Katehi, L.P.B.; Whitaker, J.F.
- Source
- IEEE Transactions on Microwave Theory and Techniques IEEE Trans. Microwave Theory Techn. Microwave Theory and Techniques, IEEE Transactions on. 49(5):849-857 May, 2001
- Subject
- Fields, Waves and Electromagnetics
Phased arrays
Optical amplifiers
Antenna measurements
Feeds
Sampling methods
Antenna arrays
Measurement techniques
Microwave amplifiers
Laboratories
Spatial resolution
- Language
- ISSN
- 0018-9480
1557-9670
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.