Bar-grid oscillators

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

Research output: Contribution to journalArticle

41 Citations (Scopus)

Abstract

Grid oscillators are an attractive way of obtaining high power levels from 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.

Original languageEnglish
Pages (from-to)225-230
Number of pages6
JournalIEEE Transactions on Microwave Theory and Techniques
Volume38
Issue number3
DOIs
Publication statusPublished - 1990 Mar 1
Externally publishedYes

Fingerprint

Solid state devices
Brass
Heat resistance
Equivalent circuits
Transistors
grids
oscillators
Modulation
solid state devices
output
brasses
directivity
thermal resistance
equivalent circuits
locking
transistors
direct current
modulation

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

Popovic, Z. B., Weikle, R. M., Kim, M., Potter, K. A., & Rutledge, D. B. (1990). Bar-grid oscillators. IEEE Transactions on Microwave Theory and Techniques, 38(3), 225-230. https://doi.org/10.1109/22.45341

Bar-grid oscillators. / Popovic, Zoya Basta; Weikle, Robert M.; Kim, Moonil; Potter, Kent A.; Rutledge, David B.

In: IEEE Transactions on Microwave Theory and Techniques, Vol. 38, No. 3, 01.03.1990, p. 225-230.

Research output: Contribution to journalArticle

Popovic, ZB, Weikle, RM, Kim, M, Potter, KA & Rutledge, DB 1990, 'Bar-grid oscillators', IEEE Transactions on Microwave Theory and Techniques, vol. 38, no. 3, pp. 225-230. https://doi.org/10.1109/22.45341
Popovic ZB, Weikle RM, Kim M, Potter KA, Rutledge DB. Bar-grid oscillators. IEEE Transactions on Microwave Theory and Techniques. 1990 Mar 1;38(3):225-230. https://doi.org/10.1109/22.45341
Popovic, Zoya Basta ; Weikle, Robert M. ; Kim, Moonil ; Potter, Kent A. ; Rutledge, David B. / Bar-grid oscillators. In: IEEE Transactions on Microwave Theory and Techniques. 1990 ; Vol. 38, No. 3. pp. 225-230.
@article{ecd0e73281404e75b77a74cd161313dc,
title = "Bar-grid oscillators",
abstract = "Grid oscillators are an attractive way of obtaining high power levels from 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.",
author = "Popovic, {Zoya Basta} and Weikle, {Robert M.} and Moonil Kim and Potter, {Kent A.} and Rutledge, {David B.}",
year = "1990",
month = "3",
day = "1",
doi = "10.1109/22.45341",
language = "English",
volume = "38",
pages = "225--230",
journal = "IEEE Transactions on Microwave Theory and Techniques",
issn = "0018-9480",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
number = "3",

}

TY - JOUR

T1 - Bar-grid oscillators

AU - Popovic, Zoya Basta

AU - Weikle, Robert M.

AU - Kim, Moonil

AU - Potter, Kent A.

AU - Rutledge, David B.

PY - 1990/3/1

Y1 - 1990/3/1

N2 - Grid oscillators are an attractive way of obtaining high power levels from 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.

AB - Grid oscillators are an attractive way of obtaining high power levels from 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.

UR - http://www.scopus.com/inward/record.url?scp=0025401984&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0025401984&partnerID=8YFLogxK

U2 - 10.1109/22.45341

DO - 10.1109/22.45341

M3 - Article

VL - 38

SP - 225

EP - 230

JO - IEEE Transactions on Microwave Theory and Techniques

JF - IEEE Transactions on Microwave Theory and Techniques

SN - 0018-9480

IS - 3

ER -