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Proceedings Paper

A Low-Loss High-Power Filter For Direct Broadcast Satellite Transponders
Author(s): Toshihiro Nomoto
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Paper Abstract

In designing broadcast satellite transponders, it is required for the filters handling high-power RF signals to have not only low-loss characteristics but also good thermal stability. In order to realize such filter performance, we proposed a 6-pole canonical TE113 dual-mode filter which is formed of silver-plated Super Invar cavities with copper iris plates. The insertion loss and thermal stability of the experimental filter were 0.3dB and 1.5ppm/C, respectively. Also, no significant deteriora-tion on the filter performance was observed even at the RF input power of around 400W. AS a result, it was found that this type of filter was most suitable for the high-power satellite transponders in view of insertion loss, thermal design, volume and weight.

Paper Details

Date Published: 18 November 1989
PDF: 1 pages
Proc. SPIE 1039, 13th Intl Conf on Infrared and Millimeter Waves, (18 November 1989); doi: 10.1117/12.978348
Show Author Affiliations
Toshihiro Nomoto, NHK Science and Technical Research Laboratories (Japan)

Published in SPIE Proceedings Vol. 1039:
13th Intl Conf on Infrared and Millimeter Waves
Richard J. Temkin, Editor(s)

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