A miniature 2.1-GHz low loss microstrip filter with independent electric and magnetic coupling

Author

Park, Sang-June ; Van Caekenberghe, Koen ; Rebeiz, Gabriel M.

Author_Institution

Univ. of Michigan, Ann Arbor, MI, USA

Volume

14

Issue

10

fYear

2004

Firstpage

496

Lastpage

498

Abstract

A miniature planar two-pole microstrip filter with independent electric and magnetic coupling has been developed at 2.1 GHz. The independent coupling allows separate control of two transmission zeroes and result in a sharp filter skirt. The two-pole filter occupies an area of 6.6×4.6 mm² (30 mm²) on an ε_r=10.2 substrate, and shows a 5% bandwidth (100 MHz) and an insertion loss of 1.4 dB. The filter unloaded Q is 150 at 2.1 GHz which is much better than compatible filters done in LTCC technology.

Keywords

UHF filters; band-pass filters; coupled circuits; microstrip filters; poles and zeros; 1.4 dB; 100 MHz; 2.1 GHz; LTCC technology; band pass filter; duroid substrate; electric coupling; independent coupling; low loss microstrip filter; magnetic coupling; miniature planar filter; sharp filter skirt; transmission zeroes; Admittance; Band pass filters; Capacitance; Circuits; Couplings; Insertion loss; Magnetic separation; Microstrip filters; Resonator filters; Wireless communication; Band pass filter; duroid substrate; electric and magnetic coupling; miniature planar filter;

fLanguage

English

Journal_Title

Microwave and Wireless Components Letters, IEEE

Publisher

ieee

ISSN

1531-1309

Type

jour

DOI

10.1109/LMWC.2004.836803

Filename

1339303