Wideband low-phase-noise high-power W-band signal sources

This paper describes the development of electronically-tunable wideband low-phase-noise millimeter-wave signal sources. These sources are designed to drive cooled Schottky multipliers to supply the LO for the ALMA telescope array. Each phase-locked driver consists of a YTO, active multiplier chain (...

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Published in2001 IEEE MTT-S International Microwave Sympsoium Digest (Cat. No.01CH37157) Vol. 3; pp. 1817 - 1820 vol.3
Main Authors Bryerton, E.W., Thacker, D.L., Saini, K.S., Bradley, R.F.
Format Conference Proceeding
LanguageEnglish
Published IEEE 2001
Subjects
Broadband amplifiers
Driver circuits
Millimeter wave measurements
Optical design
Power amplifiers
Power generation
Power measurement
Prototypes
Telescopes
Wideband
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Summary:This paper describes the development of electronically-tunable wideband low-phase-noise millimeter-wave signal sources. These sources are designed to drive cooled Schottky multipliers to supply the LO for the ALMA telescope array. Each phase-locked driver consists of a YTO, active multiplier chain (AMC), and a power amplifier. Measurements of a prototype driver electronically tunable from 72-85 GHz with greater than 50 mW output power are presented. Additive phase noise of individual amplifiers and multipliers is described. Long-term phase drift measurements are reported. Preliminary W-band amplitude noise measurements using a SIS mixer with a YTO-based driver chain and Gunn oscillator LO are also presented. All measurements indicate that the stringent ALMA LO specifications can be met with this architecture.
ISBN:0780365380
9780780365384
ISSN:0149-645X
2576-7216
DOI:10.1109/MWSYM.2001.967260