A signal-to-noise enhancer using two MSSW filters and its application to noise reduction in DBS reception

Author

Nomoto, Toshihiro ; Matsushita, Yoshihiro

Author_Institution

NHK Sci. & Tech. Res. Labs., Tokyo, Japan

Volume

41

Issue

8

fYear

1993

fDate

8/1/1993 12:00:00 AM

Firstpage

1316

Lastpage

1322

Abstract

This paper describes the design and development of a new type of MSW signal-to-noise enhancer which consists of a microwave circuit using two MSSW filters, one of which operates as a frequency selective power limiter. It also describes the first application of such an enhancer to DBS reception. Compared with a conventional enhancer, the threshold level and the limiting action level of this enhancer are 13 dB and 27 dB lower, respectively, and the slope from the former to the latter is much steeper. As a result, the enhancer makes it possible to achieve 20-dB lower-power operation (below +10 dBm) of periphery driving circuits. In DBS reception below the FM threshold, the enhancer improves the S/N of the video signal by 2 to 8 dB

Keywords

direct broadcasting by satellite; interference suppression; magnetostatic wave devices; microwave circuits; microwave filters; passive filters; television broadcasting; television interference; television reception; DBS reception; FM threshold; MSSW filters; MSW; SNR enhancer; TV signals; frequency selective power limiter; microwave circuit; noise reduction; signal-to-noise enhancer; video signal; Circuits; Frequency; Magnetic separation; Magnetostatic waves; Microstrip; Microwave filters; Noise reduction; Satellite broadcasting; Signal design; Tellurium;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.241669

Filename

241669