TY - JOUR
T1 - New cross-coupled filter design using improved hairpin resonators
AU - Lee Sheng-Yuan, Sheng-Yuan
AU - Tsai, Chih Ming
N1 - Funding Information:
Manuscript received March 2, 2000; revised August 23, 2000. This work was supported in part by the National Science Council, Taiwan, R.O.C. under Grant NSC 88-2213-E006-076. The authors are with the Department of Electrical Engineering, National Cheng Kung University, Tainan 70101, Taiwan, R.O.C. Publisher Item Identifier S 0018-9480(00)10778-1.
PY - 2000
Y1 - 2000
N2 - Stepped-impedance resonators have been thoroughly studied in this paper. Two equations for odd- and even-mode resonance are derived from a new network model. The size and resonant frequencies of the resonator could then be designed based on these two equations. A new resonator-embedded cross-coupled filter, constructed by stepped-impedance hairpin resonators and miniaturized hairpin resonators, is presented. This new filter is very compact and has lower spurious response. A 0° feed structure, which adds two transmission zeros to the filter response, is also studied. The two zeros are so close to the passband that the selectivity and out-of-band rejection of the filter are significantly increased. The design has been verified by experiment results.
AB - Stepped-impedance resonators have been thoroughly studied in this paper. Two equations for odd- and even-mode resonance are derived from a new network model. The size and resonant frequencies of the resonator could then be designed based on these two equations. A new resonator-embedded cross-coupled filter, constructed by stepped-impedance hairpin resonators and miniaturized hairpin resonators, is presented. This new filter is very compact and has lower spurious response. A 0° feed structure, which adds two transmission zeros to the filter response, is also studied. The two zeros are so close to the passband that the selectivity and out-of-band rejection of the filter are significantly increased. The design has been verified by experiment results.
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U2 - 10.1109/22.899002
DO - 10.1109/22.899002
M3 - Article
AN - SCOPUS:0034429261
SN - 0018-9480
VL - 48
SP - 2482
EP - 2490
JO - IEEE Transactions on Microwave Theory and Techniques
JF - IEEE Transactions on Microwave Theory and Techniques
IS - 12
ER -