Novel compact elliptic-function narrow-band bandpass filters using microstrip open-loop resonators with coupled and crossing lines

Author

Yu, Cheng-Cheh ; Chang, Kai

Author_Institution

Nat. Taipei Univ. of Technol., Taiwan

Volume

46

Issue

7

fYear

1998

fDate

7/1/1998 12:00:00 AM

Firstpage

952

Lastpage

958

Abstract

Novel compact elliptic-function narrow-band bandpass filters have been designed and fabricated. This new configuration consists of two identical microstrip open-loop resonators with coupled and crossing lines. A theoretical investigation has confirmed that this novel configuration is capable of providing elliptic-function filtering. Furthermore, the feasibility of this filter is verified experimentally. Centered at 2.039 GHz, the fabricated microstrip bandpass filter shows a measured 3-dB bandwidth of 2% and two deep notches in its stopband. In addition, the main circuit of this filter occupies only 2.5 cm×1.5 cm using a substrate with dielectric constant of 10.5, making it very attractive for applications in the mobile and personal communication systems (PCS´s)

Keywords

band-pass filters; elliptic filters; microstrip filters; microstrip resonators; mobile communication; notch filters; personal communication networks; 2.039 GHz; 3-dB bandwidth; coupled lines; crossing lines; dielectric constant; elliptic-function narrow-band bandpass filters; microstrip open-loop resonators; mobile communication systems; notches; personal communication systems; Band pass filters; Bandwidth; Circuits; Dielectric measurements; Dielectric substrates; Filtering; Microstrip filters; Microstrip resonators; Narrowband; Resonator filters;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.701448

Filename

701448