A Gunn diode based surface mount 77 GHz oscillator for automotive applications

Author

Priestley, N. ; Newsome, K. ; Dale, I. ; Norton, P.

Author_Institution

Marconi Appl. Technol., Lincoln, UK

Volume

3

fYear

2002

fDate

2-7 June 2002

Firstpage

1863

Abstract

Gunn diode cavity oscillators are currently used in the majority of ACC 77 GHz radar systems. These are bulky and normally require to be individually tuned. A substrate based voltage controlled oscillator has been developed, still using a Gunn diode; which has small size, is surface mount packaged and which retains the superior performance of a Gunn based oscillator over MMIC solutions. A good performance over temperature is achieved, due to the use of hot electron injection in the Gunn diode and the oscillator is voltage tuned by employing a varactor diode. The design, construction and performance are presented of a planar circuit based VCO which is suitable for high volume production.

Keywords

CW radar; FM radar; Gunn oscillators; circuit tuning; millimetre wave oscillators; road vehicle radar; surface mount technology; voltage-controlled oscillators; 77 GHz; FMCW radar sensor; GaAs Gunn diode; GaAs-AlGaAs; Gunn diode based surface mount 77-GHz oscillator; adaptive cruise control; automotive radar; graded AlGaAs injector; hot electron injection; planar circuit based VCO; substrate based voltage controlled oscillator; surface mount packaging; varactor diode; voltage tuning; Automotive engineering; Diodes; Gunn devices; MMICs; Packaging; Radar; Secondary generated hot electron injection; Substrate hot electron injection; Temperature; Voltage-controlled oscillators;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 2002 IEEE MTT-S International

Conference_Location

Seattle, WA, USA

ISSN

0149-645X

Print_ISBN

0-7803-7239-5

Type

conf

DOI

10.1109/MWSYM.2002.1012226

Filename

1012226