A Dual-Mode Narrow-Band Channel Filter and Group-Delay Equalizer for a Ka-Band Satellite Transponder
| Autor: | Man Seok Uhm, Sungtek Kahng, Seong Pal Lee |
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| Rok vydání: | 2003 |
| Předmět: |
Engineering
General Computer Science business.industry Adaptive equalizer Band-stop filter Raised-cosine filter Electronic Optical and Magnetic Materials Filter design Filter (video) Transponder (satellite communications) Electronic engineering Electrical and Electronic Engineering business Active filter Root-raised-cosine filter |
| Zdroj: | ETRI Journal. 25:379-386 |
| ISSN: | 1225-6463 |
| DOI: | 10.4218/etrij.03.0102.0007 |
| Popis: | This paper presents the design of a narrow-band channel filter and its group-delay equalizer for a Ka-band satellite transponder. We used an 8th order channel filter for high selectivity with an elliptic-integral function response and an inline configuration. We designed a 2-pole. reflection-type, group-delay equalizer to compensate for the steep variation of the group-delay at the output of the channel filter, keeping the thermal stability at ±7 ns of group-delay variation at the band edges over 15-55 °C. We devised a new tuning technique using short-ended dummy cavities and used it for tuning both the filter and equalizer; this removes the necessity of additional tuning after the cavities are assembled. Through measurement, we demonstrate that the group-delay-equalized filter meets the equipment requirements and is appropriate for satellite input multiplexers. |
| Databáze: | OpenAIRE |
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