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Design and Fabrication of a Dual-Band Bandpass Filter Using a Dual-Mode Ring Resonator with Two Short-Circuited Stubs for WLAN Application

두 단락 스터브를 갖는 이중 모드 링 공진기를 이용한 WLAN용 이중대역 대역통과 여파기의 설계 및 제작

Choi, Byung-Chang
최병창

  • Received : 2015.07.20
  • Accepted : 2015.09.03
  • Published : 2015.09.30

Abstract

In this paper, A high selective dual-band bandpass filter was proposed using a dual-mode ring resonator with two short-circuited stubs. For dual-mode resonance, the ring resonator is directly connected with non-orthogonal feed-lines via coupling capacitors. Two short-circuited stubs which are unequal lengths are simultaneously placed at two corners along the two symmetry plane of the ring resonator in order to obtain dual-band responses. Because the feeding angle perturbated ring resonator of the proposed dual-band bandpass filter has the symmetrical structure, Even/Odd mode analysis can be well applied to extract the scattering parameters and transmission zero frequencies. The proposed dual-band bandpass filter was designed and fabricated for WLAN(Wireless Local Area Network) application of IEEE 802.11n standard. The measured results showed a good agreement with the simulation results, and it should be well applied not only for WLAN applications but also for any other communication systems.

Keywords

Dual-Band Bandpass Filter;Dual-Mode Ring Resonator;Short-Circuited Stub;Transmission Zero

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