Title :
Design of a 180-degree hybrid with Chebyshev filtering response using coupled resonators
Author :
Wan-Rou Liu ; Ting-Yi Huang ; Chi-Feng Chen ; Tze-Min Shen ; Ruey-Beei Wu
Author_Institution :
Dept. of Electr. Eng. & Grad. Inst. of Commun. Eng., Nat. Taiwan Univ., Taipei, Taiwan
Abstract :
A novel 180 ° hybrid with third-order Chebyshev filtering response is proposed in this paper. The coupling coefficients and the external quality factors can be synthesized from the theory of coupled resonator filter. The proposed idea is verified with experimental results, with good agreement between simulation and measurement. Comparing to the conventional rat-race coupler, 80% size reduction and filtering function with high frequency selectivity has been exhibited in the proposed structure.
Keywords :
Chebyshev filters; Q-factor; frequency selective surfaces; resonator filters; coupled resonator filter; coupled resonators; coupling coefficients; filtering function; frequency selectivity; quality factors; rat-race coupler; size reduction; third-order Chebyshev filtering response; Band-pass filters; Chebyshev approximation; Couplers; Couplings; Ports (Computers); Q-factor; 180° hybrid; Chebyshev response; bandpass filter; circuit synthesis method; size reduction;
Conference_Titel :
Microwave Symposium Digest (IMS), 2013 IEEE MTT-S International
Conference_Location :
Seattle, WA
Print_ISBN :
978-1-4673-6177-4
DOI :
10.1109/MWSYM.2013.6697512
