Transistor oscillator and amplifier grids

Robert M. Weikle, Moonil Kim, Jonathan B. Hacker, Michael P. Delisio, Zoya B. Popović, David B. Rutledge

Research output: Chapter in Book/Report/Conference proceedingChapter


In this paper, we review recent developments in quasi-optical power combining. In particular, we examine planar periodic grids and their use as quasi-optical active components. A variety ofgrids used for the generation and amplification of electromagnetic radiation have been investigated. Although quasi-optical techniques are applicable to a large variety of solid-state devices, special attention is given to transistors. Transistors are attractive because they can be used as either amplifiers or oscillators. Experimental results for MESFET bar-grid and planar grid oscillators are presented. In addition, we discuss a MESFET grid amplifier that receives only vertically polarized waves at the input and radiates horizontally polarized waves at the output. An advantage of these planar grids is they can be scaled for operation at millimeter- and submillimeter-wave frequencies. By using modern Ie fabrication technology, planar grid oscillators and amplifiers containing thousands of devices can be built, thereby realizing an efficient means for large-scale power combining.

Original languageEnglish
Title of host publicationActive Antennas and Quasi-Optical Arrays
PublisherWiley-IEEE Press
Number of pages9
ISBN (Electronic)9780470544068
ISBN (Print)0780334868, 9780780334861
Publication statusPublished - 2009 Jan 1

Bibliographical note

Publisher Copyright:
© 1999 by the Institute of Electrical and Electronics Engineers, Inc. All rights reserved.


  • Microwave amplifiers
  • Microwave integrated circuits
  • Microwave oscillators
  • Millimeter wave radar

ASJC Scopus subject areas

  • General Engineering
  • General Physics and Astronomy


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