A Wideband CPW Ring Power Combiner With Low Insertion Loss and High Port Isolation

Author

Chong Li ; Khalid, Amir ; Papageorgiou, V. ; Lok, L.B. ; Cumming, David R. S.

Author_Institution

Sch. of Eng., Univ. of Glasgow, Glasgow, UK

Volume

22

Issue

11

fYear

2012

Firstpage

580

Lastpage

582

Abstract

In this letter, we present a coplanar waveguide (CPW)-based ring power combiner that exhibits less than 0.8 dB insertion loss, better than 15 dB port match and higher than 22 dB isolation loss over the frequency range from 50 to 100 GHz. Compared with the conventional two-way Wilkinson combiner, the proposed ring power combiner replaces the resistor between the two input ports with two quasi quarter-wave CPWs, a 180^° CPW phase inverter, and two resistors that lead to frequency-insensitive port isolation and wideband port match. The power combiner is realized using an electron beam-based GaAs MMIC process along with simple electron beam airbridge technology. These results agree well with 3-D full-wave simulations.

Keywords

III-V semiconductors; MMIC; coplanar waveguide components; gallium arsenide; power combiners; resistors; 180° CPW phase inverter; electron beam airbridge technology; electron beam-based MMIC process; frequency 50 GHz to 100 GHz; frequency-insensitive port isolation; high port isolation; low insertion loss; quasi quarterwave CPW; resistor; three dimensional full-wave simulation; wideband CPW ring power combiner; wideband port match; Coplanar waveguides; Gallium arsenide; Insertion loss; MMICs; Power combiners; Power dividers; Resistors; Coplanar waveguides (CPWs); monolithic microwave integrated circuits (MMICs); phase inverter; power divider/combiner;

fLanguage

English

Journal_Title

Microwave and Wireless Components Letters, IEEE

Publisher

ieee

ISSN

1531-1309

Type

jour

DOI

10.1109/LMWC.2012.2224854

Filename

6335446