A Low-Loss High-Power Filter For Direct Broadcast Satellite Transponders

Toshihiro Nomoto

doi:10.1117/12.978348

18 November 1989 A Low-Loss High-Power Filter For Direct Broadcast Satellite Transponders

Toshihiro Nomoto

Proceedings Volume 1039, 13th Intl Conf on Infrared and Millimeter Waves; (1989) https://doi.org/10.1117/12.978348
Event: 13th International Conference on Infrared and Millimeter Waves, 1987, Honolulu, HI, United States

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.

Citation Download Citation

Toshihiro Nomoto "A Low-Loss High-Power Filter For Direct Broadcast Satellite Transponders", Proc. SPIE 1039, 13th Intl Conf on Infrared and Millimeter Waves, (18 November 1989); https://doi.org/10.1117/12.978348

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