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Bar-grid oscillators

Popović, Zoya Basta and Weikle, Robert M., II and Kim, Moonil and Potter, Kent A. and Rutledge, David B. (1990) Bar-grid oscillators. IEEE Transactions on Microwave Theory and Techniques, 38 (3). pp. 225-230. ISSN 0018-9480. doi:10.1109/22.45341.

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Grid oscillators are an attractive way of obtaining high power levels from the solid-state devices, since potentially the output powers of thousands of individual devices can be combined. The active devices do not require an external locking signal, and the power combining is done in free space. Thirty-six transistors were mounted on parallel brass bars, which provide a stable bias and have a low thermal resistance. The output power degraded gradually when the devices failed. The grid gave an effective radiated power of 3 W at 3 GHz. The directivity was 11.3 dB, and the DC-to-RF efficiency was 22%. Modulation capabilities of the grid were demonstrated. An equivalent circuit model for the grid is derived, and comparison with experimental results is shown.

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Additional Information:© Copyright 1990 IEEE. Reprinted with permission Manuscript received August 10, 1989; revised November 6, 1989. This work was supported by the Army Research Office and the Northrop Corporation.
Subject Keywords:equivalent circuits; microwave oscillators; solid-state microwave circuits; transmission line theory
Issue or Number:3
Record Number:CaltechAUTHORS:POPieeetmtt90
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:3187
Deposited By: Archive Administrator
Deposited On:19 May 2006
Last Modified:08 Nov 2021 19:54

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