Bar-Grid Oscillators

Zoya Basta Popović, Robert M. Weikle, Moonil Kim, Kent A. Potter, David B. Rutledge

Research output: Contribution to journalArticlepeer-review

43 Citations (Scopus)


Grid oscillators are an attractive way of obtaining high power levels front 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. In this work, 36 transistors are mounted on parallel brass bars, which provide a stable bias and have a low thermal resistance. The output power degrades gradually when devices fail. The grid gives an effective radiated power (ERP) of 3 W at 3 GHz. The directivity is 11.3 dB and the dc to RF efficiency is 22 percent. Modulation capabilities of the grid are demonstrated. An equivalent circuit model for the grid is derived, and comparison with experimental results is shown.

Original languageEnglish
Pages (from-to)225-230
Number of pages6
JournalIEEE Transactions on Microwave Theory and Techniques
Issue number3
Publication statusPublished - 1990 Mar

ASJC Scopus subject areas

  • Radiation
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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