An interdigital bandpass filter embedded in LTCC for 5-GHz wireless LAN applications

Author

Wang, Gangqiang ; Van, Minh ; Barlow, Fred ; Elshabini, Aicha

Author_Institution

Electr. Eng. Dept., Univ. of Arkansas, Fayetteville, AR, USA

Volume

15

Issue

5

fYear

2005

fDate

5/1/2005 12:00:00 AM

Firstpage

357

Lastpage

359

Abstract

This letter presents a compact interdigital stripline bandpass filter embedded in low temperature cofired ceramic for 5-GHz wireless LAN applications, including design, simulation, fabrication, and measurements. The filter measures 8 mm×7 mm×1.1 mm and exhibits an insertion loss of 3.6 dB, a return loss of 20 dB, and a 212-MHz passband with the midband frequency at 5.28 GHz. The filter is highly reproducible with good tolerance. A low noise amplifier (LNA) built on the top of the LTCC substrate with an embedded filter has the same bandwidth and midband frequency as those of the filter. Using this filter and an integrated chip, a small RF front-end receiver has been achieved.

Keywords

MMIC amplifiers; band-pass filters; ceramic packaging; digital integrated circuits; microwave filters; radio receivers; strip line filters; wireless LAN; 5.28 GHz; LTCC substrate; RF front-end receiver; compact interdigital stripline bandpass filter; insertion loss; interdigital bandpass filter; low noise amplifier; low temperature co-fired ceramic; midband frequency; return loss; unlicensed national information infrastructure; wireless local area networks; Band pass filters; Ceramics; Fabrication; Frequency measurement; Insertion loss; Loss measurement; Passband; Stripline; Temperature; Wireless LAN; Filters; low temperature co-fired ceramic (LTCC); unlicensed national information infrastructure (UNII); wireless local area networks (WLANs);

fLanguage

English

Journal_Title

Microwave and Wireless Components Letters, IEEE

Publisher

ieee

ISSN

1531-1309

Type

jour

DOI

10.1109/LMWC.2005.847711

Filename

1427742