A simple and accurate model for microstrip structures with slotted ground plane

Author

Caloz, Christophe ; Okabe, Hiroshi ; Iwai, Taisuke ; Itoh, Tatsuo

Author_Institution

Electr. Eng. Dept., Univ. of California, Los Angeles, CA, USA

Volume

14

Issue

4

fYear

2004

fDate

4/1/2004 12:00:00 AM

Firstpage

133

Lastpage

135

Abstract

A simple and accurate circuit model for microstrip filtering structures with slotted ground plane is presented. The unit cell model consists of a series inductance and shunt capacitance for the microstrip line, an ideal transmission line characterized by its impedance and electrical length for the slot, and an ideal transformer to model coupling to the slot. The coupling mechanism to the slots resonances and subsequent emergence of transmission gaps is explained for different positions of the microstrip line. Excellent agreement with measurement is demonstrated over the broad bandwidth of dc to 20 GHz.

Keywords

electromagnetic coupling; microstrip filters; microstrip lines; slot lines; waveguide theory; 0 to 20 GHz; defected ground planes; microstrip filtering structures; microstrip line; microstrip structure model; series inductance; shunt capacitance; slot lines; slotted ground plane; transformer; transmission gaps; transmission line; unit cell model; Capacitance; Coupling circuits; Distributed parameter circuits; Filtering; Impedance; Inductance; Microstrip filters; Resonance; Shunt (electrical); Transmission line measurements;

fLanguage

English

Journal_Title

Microwave and Wireless Components Letters, IEEE

Publisher

ieee

ISSN

1531-1309

Type

jour

DOI

10.1109/LMWC.2004.828725

Filename

1291441