Miniaturized Multilayer Bandpass Filter with Multiple Transmission Zeros

Author

Kundu, Arun ; Mellen, Neal

Author_Institution

TDK R&D Corp., Phoenix, AZ

fYear

2006

fDate

11-16 June 2006

Firstpage

760

Lastpage

763

Abstract

A miniaturized three-stage combline multilayer bandpass filter having five transmission zeros is proposed. The filter is implemented in a novel semi-distributed stripline configuration using LTCC technology that occupies an area of (2.00 times 1.25 times 0.50) mm³. A distinct feature of this filter is the independent creation and control of the upper band transmission zeros to improve the skirt characteristics. Measured samples show a maximum of 1.5 dB insertion loss in the pass band with a center frequency at 5.5 GHz and a 3dB bandwidth of 20%. The BPF has 40 dB and 20 dB of attenuation at 4.0 GHz and 7.2 GHz respectively, making it a desirable candidate for wireless LAN applications

Keywords

band-pass filters; crystal filters; equivalent circuits; microwave filters; poles and zeros; wireless LAN; 3D integration; 4.0 GHz; 5.5 GHz; 7.2 GHz; LTCC; multilayer bandpass filter; multiple transmission zeros; semi-distributed stripline configuration; skirt characteristic improvement; upper band transmission zeros control; wireless LAN application; Attenuation; Band pass filters; Bandwidth; Filtering theory; Frequency measurement; Insertion loss; Loss measurement; Nonhomogeneous media; Stripline; Wireless LAN; 3-D integration; Bandpass filter; LTCC; semi-distributed filter; transmission zero;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 2006. IEEE MTT-S International

Conference_Location

San Francisco, CA

ISSN

0149-645X

Print_ISBN

0-7803-9541-7

Electronic_ISBN

0149-645X

Type

conf

DOI

10.1109/MWSYM.2006.249764

Filename

4015017