Microwave Active Array Elements

Kai Chang; Kenneth A. Hummer; James L. Klein

doi:10.1117/12.947446

8 September 1988 Microwave Active Array Elements

Kai Chang, Kenneth A. Hummer, James L. Klein

Proceedings Volume 0947, Interconnection of High Speed and High Frequency Devices and Systems; (1988) https://doi.org/10.1117/12.947446
Event: Advances in Semiconductors and Superconductors: Physics and Device Applications, 1988, Newport Beach, CA, United States

Abstract

Two types of active antenna elements have been investigated. One type uses a microstrip antenna with an active device mounted directly on the antenna. The other uses an active device coupled to a microstrip patch antenna through an aperture. Microstrip active antenna elements and two-element arrays have been demonstrated for both types of circuits. Injection locking of the antenna elements has been achieved through space and mutual coupling. The circuit Q-factor was calculated based on the locking gain and locking bandwidth. The power outputs from two elements have been successfully combined in free space with a combining efficiency of over 90 percent. An analytical method based upon the aperture coupling theory and the derivation of S-parameter matrix has been developed for modeling a microstrip line coupled to a microstrip patch antenna using a circular coupling aperture. The results should have many applications in low cost active arrays, active transmitters, and spatial power combiners.

Citation Download Citation

Kai Chang, Kenneth A. Hummer, and James L. Klein "Microwave Active Array Elements", Proc. SPIE 0947, Interconnection of High Speed and High Frequency Devices and Systems, (8 September 1988); https://doi.org/10.1117/12.947446

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