Planar MESFET grid oscillators using gate feedback

Robert W. Weikle, Moonil Kim, Jonathan B. Hacker, Michael P. De Lisio, David B. Rutledge

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

A method for quasi-optically combining the output power of MESFETs in which drain and source leads couple directly to the radiated field is introduced. The design consists of a planar grid of devices placed in a Fabry-Perot cavity. Capacitive feedback is provided to the gate, allowing oscillation at much higher frequencies than previous grids. The oscillation frequency is dependent on the device characteristics, M+e resonator cavity, and the symmetries of the grid. A transmission-line model for the grid is discussed and used to design two oscillator arrays. A 16-element grid has produced 335 mW of power at 11.6 GHz with a DC-to-RF conversion efficiency of 20%. This design was scaled to produce a 36-element grid oscillator with output power of 235 mW at 17 GHz. These results represent a significant improvement in the performance of planar grid oscillators. The planar configuration of the grid is very convenient for monolithic integration and is easily scalable to millimeter-wave frequencies.

Original languageEnglish
Pages (from-to)1997-2003
Number of pages7
JournalIEEE Transactions on Microwave Theory and Techniques
Volume40
Issue number11
DOIs
Publication statusPublished - 1992 Nov 1
Externally publishedYes

Fingerprint

field effect transistors
grids
oscillators
Feedback
Cavity resonators
Millimeter waves
Conversion efficiency
Electric lines
oscillations
output
cavity resonators
millimeter waves
transmission lines
direct current
cavities
symmetry
configurations

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

Weikle, R. W., Kim, M., Hacker, J. B., De Lisio, M. P., & Rutledge, D. B. (1992). Planar MESFET grid oscillators using gate feedback. IEEE Transactions on Microwave Theory and Techniques, 40(11), 1997-2003. https://doi.org/10.1109/22.168756

Planar MESFET grid oscillators using gate feedback. / Weikle, Robert W.; Kim, Moonil; Hacker, Jonathan B.; De Lisio, Michael P.; Rutledge, David B.

In: IEEE Transactions on Microwave Theory and Techniques, Vol. 40, No. 11, 01.11.1992, p. 1997-2003.

Research output: Contribution to journalArticle

Weikle, RW, Kim, M, Hacker, JB, De Lisio, MP & Rutledge, DB 1992, 'Planar MESFET grid oscillators using gate feedback', IEEE Transactions on Microwave Theory and Techniques, vol. 40, no. 11, pp. 1997-2003. https://doi.org/10.1109/22.168756
Weikle, Robert W. ; Kim, Moonil ; Hacker, Jonathan B. ; De Lisio, Michael P. ; Rutledge, David B. / Planar MESFET grid oscillators using gate feedback. In: IEEE Transactions on Microwave Theory and Techniques. 1992 ; Vol. 40, No. 11. pp. 1997-2003.
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