Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference (한국전기전자재료학회:학술대회논문집)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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Miniature Multilayer LTCC Bandpass Filter with Attenuation poles

감쇄극을 갖는 초소형 적층 LTCC 대역통과 필터

  • Lee, Y.S. (Korea Electronics Technology Institute) ;
  • Song, H.S. (Korea Electronics Technology Institute) ;
  • Bang, K.S. (Korea Electronics Technology Institute) ;
  • Kim, J.C. (Korea Electronics Technology Institute) ;
  • Park, J.C. (Korea Electronics Technology Institute)
  • Published : 2003.07.10
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Abstract

In this paper, We proposed compact multi-layer LTCC (Low Temperature Cofired Ceramic) bandpass filter for Bluetooth module. A ${\lambda}/4$ coupled stripline resonators are designed, which composed of coupled strip-line section and loading capacitance. This resonator with a loading capacitor has slow-wave characteristics. Due to the slow-wave effect of the proposed resonator, it is possible to design and fabricate a compact bandpass filter with a wide upper stop band. Attenuation poles in the lower stop band are achieved using controlling of electro-magnetic coupling between resonators. Using multi-layer LTCC technology, we designed and fabricated band pass filter with a finite attenuation pole and wide upper stopband. The overall size of the filter is $1.2{\times}2.0{\times}1.0mm^3$.

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