Design of Direct Coupled Combline Filter With Tapped Line in/output For Ku-band Satellite Transponder Downconverter

직접 결합 방식의 Tapped Line 입/출력을 갖는 Ku 대역 위성 중계기 주파수 변환기용 Combline 필터의 설계

The design procedure for direct coupled combline filter with tapped line in/out was summarized on Ku-band satellite frequency downconverter for stellite application. We calculated the resonator dimensions, spacing between successive resonators, ground plane spacing and tapping position of in/output lines in accordance with the given procedure. Partitions wer eemployed between adjacent resonators by inserting irises to improve filter response characteristis. The designed filter was manufactued with aluminum alloy package to reduce mass, and resonators wer machined from the filter body and in/output lines wer fixed on resonators with epoxy to survive in vibration conditon during launch.