A 3-D Miniaturized High Selectivity Bandpass Filter in LTCC Technology

Author

Arabi, Eyad ; Lahti, M. ; Vaha-Heikkila, T. ; Shamim, A.

Author_Institution

Dept. of Comput., Electr. & Math. Sci. & Eng. (CEMSE), King Abdullah Univ. of Sci. & Technol. (KAUST), Thuwal, Saudi Arabia

Volume

24

Issue

1

fYear

2014

fDate

Jan. 2014

Firstpage

8

Lastpage

10

Abstract

Transmission zeros are used to improve the roll-off factors of filters but as a consequence, the out-of-band rejection decreases. In this work, an LTCC filter design is presented which employs a series inductor (implemented as a via hole) to improve the out-of-band rejection by introducing a third transmission zero. The filter, designed for GPS band (1.57 GHz), has one of the smallest reported foot prints ( (0.063×0.048×0.005)λ_g) and demonstrates the highest roll off factor (16.7 dB/100 MHz) for this band. With only four LTCC layers, the design is cost effective and thus highly suitable for miniaturized, ultra-thin system-on-package applications.

Keywords

band-pass filters; ceramic packaging; inductors; system-on-package; 3D miniaturized high-selectivity bandpass filter; GPS band; LTCC filter design; LTCC layers; LTCC technology; frequency 1.57 GHz; out-of-band rejection; roll-off factors; series inductor; transmission zeros; ultrathin-system-on-package applications; Band-pass filters; Capacitors; Filtering theory; Global Positioning System; Inductance; Inductors; Microwave filters; Bandpass filter (BPF); low temperature co-fired ceramic (LTCC); system on package (SoP);

fLanguage

English

Journal_Title

Microwave and Wireless Components Letters, IEEE

Publisher

ieee

ISSN

1531-1309

Type

jour

DOI

10.1109/LMWC.2013.2285285

Filename

6649973