Quasi-optical stabilisation of millimetre wave sources

Author

Smith, G.M. ; Lesurf, J.C.G.

Author_Institution

Dept. of Phys. & Astron., St. Andrews Univ., Fife, UK

fYear

1992

fDate

1-5 June 1992

Firstpage

699

Abstract

A novel tunable quasi-optical scheme is presented to provide stabilization of both fundamental and second-harmonic oscillators at w-band (75-100 GHz), with excellent isolation from the load. A reduction of phase noise by more than 40 dB on free-running Gunn oscillators at 90 GHz was demonstrated with single sideband phase noise better than -120 dBc/Hz at 100 kHz away from the carrier. This stabilization scheme uses external high-Q transmission and reaction stabilizing cavities, where coupling was achieved by using beam-splitters with low power loss. This technique is applicable to almost any existing oscillator at W-band or above, at any frequency.<>

Keywords

Gunn oscillators; cavity resonators; frequency stability; microwave oscillators; semiconductor device noise; solid-state microwave circuits; 75 to 100 GHz; MM-wave source stabilisation; beam-splitters; external high-Q cavity resonators; free-running Gunn oscillators; fundamental oscillators; isolation from load; phase noise reduction; quasi-optical stabilisation scheme; second-harmonic oscillators; single sideband phase noise; stabilizing cavities; tunable quasi-optical scheme; w-band; Diodes; Frequency; Gunn devices; Local oscillators; Microwave oscillators; Noise reduction; Optical noise; Phase noise; Tunable circuits and devices; Wideband;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 1992., IEEE MTT-S International

Conference_Location

Albuquerque, NM, USA

ISSN

0149-645X

Print_ISBN

0-7803-0611-2

Type

conf

DOI

10.1109/MWSYM.1992.188080

Filename

188080