A Study on the New Configuration of Dielectric Bandpass Filter Using Comb-Line Design Theory

Comb-Line 설계 이론을 이용한 세라믹 유전체 대역통과 필터의 새로운 구현에 관한 연구

This paper presents a new configuration of dielectric bandpass filter using the comb-line filter design theory. This filter is composed of a homogeneous dielectric monoblock $(\varepsilonr=35.5)$ with two metal post and a dielectric sheet $(\varepsilonr=9.8).$ In this structure, the RF leakage is suppressed without other shield housing. For the fabricated filter, insertion loss value in the passband region was 0.9dB(Max.) and return loss value was 19dB(Min). Also, this filter has a attenuation pole in the stopband.