High-resolution spectrometer systems based on SAW chirp filters

Author

Zhang, Yuxing ; Gong, Junjie ; Zhou, Xianwen ; Yulan Wei ; Cheeke, J.D.N.

Author_Institution

Dept. of Phys., Concordia Univ., Montreal, Que., Canada

Volume

1

fYear

1997

fDate

5-8 Oct 1997

Firstpage

89

Abstract

In this paper, two high-resolution spectrometer systems based on SAW Chirp-Z-Transform are reported. To achieve high frequency resolutions of 15 kHz (for unweighted compressor) and 20 kHz (for weighted compressor), two SAW RAC, with 68 μs dispersion duration each, are cascaded as an expander to offer a long-duration chirp signal and another RAC also with 68 μs dispersion is used as the compressor. Both systems are developed in the form of independent modules, and can be used as general-purpose spectrometer subsystems

Keywords

VHF filters; Z transforms; chirp modulation; radiofrequency spectrometers; spectral analysers; surface acoustic wave filters; surface acoustic wave signal processing; ultrasonic arrays; 140 MHz; 15 kHz; 20 kHz; 68 mus; 85 MHz; SAW Chirp-Z-Transform; SAW RAC; SAW chirp filters; dispersion duration; expander; high frequency resolution; high-resolution spectrometer systems; long-duration chirp signal; spectrometer subsystems; unweighted compressor; weighted compressor; Bandwidth; Chirp; Convolution; Delay effects; Filters; Frequency; Signal resolution; Space technology; Spectroscopy; Surface acoustic waves;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 1997. Proceedings., 1997 IEEE

Conference_Location

Toronto, Ont.

ISSN

1051-0117

Print_ISBN

0-7803-4153-8

Type

conf

DOI

10.1109/ULTSYM.1997.662986

Filename

662986