Title :
Dual-bandpass filters with serial configuration using LTCC technology
Author :
Lin, Ke-Chiang ; Chang, Chun-Fu ; Wu, Min-Chung ; Chung, Shyh-Jong
Author_Institution :
Dept. of Commun. Eng., Nat. Chiao Tung Univ., Hsinchu
fDate :
6/1/2006 12:00:00 AM
Abstract :
A dual-bandpass filter that utilizes a serial configuration of the inductive coupled-line (ICL) filter and the capacitive coupled-line (CCL) filter is investigated in this study. Numerical analysis is presented for the difference between the ICL and CCL filters. The dual-bandpass filter has a similar behavior to the individual single-band filter around the corresponding passband. An extra transmission zero can be generated between the two passbands of the dual-bandpass filter in that the ICL and CCL filters exhibit an out-of-phase response. Four architectures of dual-bandpass filters are proposed for the 2.4/5-GHz systems. Two of them are demonstrated by the low-temperature co-fired ceramic multilayer technology. Measurements results agree quite well with the simulation ones
Keywords :
UHF filters; band-pass filters; ceramics; microwave filters; multilayers; 2.4 GHz; 5 GHz; LTCC technology; capacitive coupled-line filter; dual bandpass filters; inductive coupled-line filter; low-temperature co-fired ceramic multilayer technology; serial configuration; transmission zero; Band pass filters; Ceramics; Couplings; Dual band; Filtering theory; Nonhomogeneous media; OFDM; Passband; Resonator filters; Wireless LAN; Bandpass filter; dual-band; low-temperature co-fired ceramic (LTCC); wireless local area network (WLAN);
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.2006.875267
