A novel type of constant impedance travelling wave phase shifter for InP-based MMICs

Author

Kremer, R. ; Redlich, S. ; Brings, L. ; Jager, D.

Author_Institution

FG Optoelektronik, Gerhard-Mercator-Univ., Duisburg, Germany

Volume

1

fYear

1996

fDate

17-21 June 1996

Firstpage

265

Abstract

The paper presents a novel type of externally controllable phase shifter based on periodic coplanar transmission lines consisting of Schottky contact (SCCPL) and coplanar sections on passive substrate. The modeling of the devices is carried out by utilizing a four-pole representation of the underlying /spl pi/-sections. An optimized InP-InGaAs-InAlAs layer structure for the SCCPL is developed providing an external electronic control. Measured phase shifts up to 60/spl deg//mm at 20 GHz with a line impedance of 48/spl plusmn/1.2 /spl Omega/ agree well with theoretical calculations.

Keywords

MMIC phase shifters; Schottky barriers; electric impedance; equivalent circuits; indium compounds; integrated circuit modelling; transmission line theory; /spl pi/-sections; 20 GHz; InP; InP-InGaAs-InAlAs; InP-based MMICs; SHF; Schottky contact; constant impedance phase shifter; coplanar sections; external electronic control; externally controllable phase shifter; four-pole representation; optimized InP/InGaAs/InAlAs layer structure; passive substrate; periodic coplanar transmission lines; travelling wave phase shifter; Capacitance; Coplanar transmission lines; Distributed parameter circuits; Impedance; Indium gallium arsenide; MMICs; Microwave devices; Phase shifters; Schottky barriers; Substrates;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 1996., IEEE MTT-S International

Conference_Location

San Francisco, CA, USA

ISSN

0149-645X

Print_ISBN

0-7803-3246-6

Type

conf

DOI

10.1109/MWSYM.1996.508508

Filename

508508