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Submillimeter sources for radiometry using high power Indium Phosphide Gunn diode oscillatorsA study aimed at developing high frequency millimeter wave and submillimeter wave local oscillator sources in the 60-600 GHz range was conducted. Sources involved both fundamental and harmonic-extraction type Indium Phosphide Gunn diode oscillators as well as varactor multipliers. In particular, a high power balanced-doubler using varactor diodes was developed for 166 GHz. It is capable of handling 100 mW input power, and typically produced 25 mW output power. A high frequency tripler operating at 500 GHz output frequency was also developed and cascaded with the balanced-doubler. A dual-diode InP Gunn diode combiner was used to pump this cascaded multiplier to produce on the order of 0.5 mW at 500 GHz. In addition, considerable development and characterization work on InP Gunn diode oscillators was carried out. Design data and operating characteristics were documented for a very wide range of oscillators. The reliability of InP devices was examined, and packaging techniques to enhance the performance were analyzed. A theoretical study of a new class of high power multipliers was conducted for future applications. The sources developed here find many commercial applications for radio astronomy and remote sensing.
Document ID
19930008868
Document Type
Contractor Report (CR)
Authors
Deo, Naresh C. (Millitech Corp. South Deerfield, MA, United States)
Date Acquired
September 6, 2013
Publication Date
February 9, 1990
Subject Category
ELECTRONICS AND ELECTRICAL ENGINEERING
Report/Patent Number
NAS 1.26:190885
NASA-CR-190885
Funding Number(s)
CONTRACT_GRANT: NAS7-996
CONTRACT_GRANT: SBIR-08.02-8551A
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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