TY - JOUR
T1 - A new tri-band bandpass filter based on stub-loaded step-impedance resonator
AU - Chen, Wei Yu
AU - Weng, Min Hang
AU - Chang, Shoou Jinn
PY - 2012/4
Y1 - 2012/4
N2 - A tri-band bandpass filter designed based on a stub-loaded step-impedance resonator (SIR) is proposed. The resonant behavior of the stub-loaded SIR is analyzed. By properly controlling the impedance ratio K 1, the length ratio (α) and the length ratio (r) of the stub-loaded SIR, the center frequencies are designed at 1.575, 2.4, and 3.5 GHz, respectively, corresponding to the GPS, WLAN and WiMAX applications. Furthermore, a 0° feed structure is used to provide at least one transmission zero near passband edge of each passband, resulting in high selectivity. Experimental results show good agreement with the simulated results.
AB - A tri-band bandpass filter designed based on a stub-loaded step-impedance resonator (SIR) is proposed. The resonant behavior of the stub-loaded SIR is analyzed. By properly controlling the impedance ratio K 1, the length ratio (α) and the length ratio (r) of the stub-loaded SIR, the center frequencies are designed at 1.575, 2.4, and 3.5 GHz, respectively, corresponding to the GPS, WLAN and WiMAX applications. Furthermore, a 0° feed structure is used to provide at least one transmission zero near passband edge of each passband, resulting in high selectivity. Experimental results show good agreement with the simulated results.
UR - http://www.scopus.com/inward/record.url?scp=84862828387&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84862828387&partnerID=8YFLogxK
U2 - 10.1109/LMWC.2012.2187884
DO - 10.1109/LMWC.2012.2187884
M3 - Article
AN - SCOPUS:84862828387
SN - 1531-1309
VL - 22
SP - 179
EP - 181
JO - IEEE Microwave and Wireless Components Letters
JF - IEEE Microwave and Wireless Components Letters
IS - 4
M1 - 6171882
ER -