Tri-band filter using combined E-type resonators
作者： W.X. Fan , Z.P. Li , S.X. Gong
DOI: 10.1049/EL.2012.3617
关键词:
摘要: A compact microstrip tri-band bandpass filter using novel combined E-type resonators (CETRs) is presented. The CETR consists of a quarter-wavelength (λ/4) stepped-impedance resonator (SIR) and unit impedance through via-hole. These two components are relatively independent. first the third passband centre frequencies can be flexibly controlled by tuning ratio RZ SIR, whereas second frequency fixed. independently lengths L2. designed to operate at 1.95, 5.2, 3.5 GHz. simulated measured results show good agreement.
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