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

Volume

54

Issue

6

fYear

2006

fDate

6/1/2006 12:00:00 AM

Firstpage

2321

Lastpage

2328

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);

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/TMTT.2006.875267

Filename

1643558