High power mm-wave systems for pulsed and CW ESR

Author

Bolton, D.R. ; Robertson, D.A. ; Cruickshank, P.A.S. ; Smith, G.M.

Author_Institution

Sch. of Phys. & Astron., Saint Andrews Univ., UK

fYear

2004

fDate

27 Sept.-1 Oct. 2004

Firstpage

135

Lastpage

136

Abstract

We describe a low noise mm-wave source and coherent heterodyne detection system designed to operate at both 94 GHz and 188 GHz for both CW and pulsed ESR. The source maintains phase coherence throughout, and has intrinsic bandwidths which allows ns pulse ESR spectrometry to be performed. The multiplied source can produce +23 dBm at 94 GHz and has been designed to act as an input to a 1 kW amplifier for high power pulsed ESR. By using a DRO based signal source a 30 dB improvement in the spectrometer noise floor over a Gunn based source has been measured.

Keywords

EPR spectrometers; dielectric resonator oscillators; heterodyne detection; millimetre wave detectors; millimetre wave oscillators; phase noise; 1 kW; 188 GHz; 94 GHz; CW ESR; DRO; ESR spectrometer; Gunn based source; coherent heterodyne detection system; high power mm-wave systems; low noise mm-wave source; phase coherence; pulsed ESR; Bandwidth; Detectors; Frequency; Leak detection; Oscillators; Paramagnetic resonance; Phase detection; Phase noise; Pulse amplifiers; Spectroscopy;

fLanguage

English

Publisher

ieee

Conference_Titel

Infrared and Millimeter Waves, 2004 and 12th International Conference on Terahertz Electronics, 2004. Conference Digest of the 2004 Joint 29th International Conference on

Print_ISBN

0-7803-8490-3

Type

conf

DOI

10.1109/ICIMW.2004.1421990

Filename

1421990