Title :
Miniaturized Multilayer Bandpass Filter with Multiple Transmission Zeros
Author :
Kundu, Arun ; Mellen, Neal
Author_Institution :
TDK R&D Corp., Phoenix, AZ
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;
Conference_Titel :
Microwave Symposium Digest, 2006. IEEE MTT-S International
Conference_Location :
San Francisco, CA
Print_ISBN :
0-7803-9541-7
Electronic_ISBN :
0149-645X
DOI :
10.1109/MWSYM.2006.249764
