Title :
A novel type of constant impedance traveling wave phase shifter for InP-based MMICs
Author :
Kremer, R. ; Redlich, S. ; Brings, L. ; Jager, D.
Author_Institution :
Gerhard-Mercator-Univ., Duisburg,, Germany
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 a 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 :
III-V semiconductors; MMIC phase shifters; Schottky barriers; equivalent circuits; indium compounds; integrated circuit modelling; transmission line theory; /spl pi/-sections; 20 GHz; InP-InGaAs-InAlAs; InP-based MMICs; Schottky contact; constant impedance phase shifter; coplanar sections; external electronic control; four-pole representation; modeling; passive substrate; periodic coplanar transmission lines; traveling wave phase shifter; Capacitance; Coplanar transmission lines; Distributed parameter circuits; Impedance; Indium gallium arsenide; MMICs; Microwave devices; Phase shifters; Schottky barriers; Substrates;
Conference_Titel :
Microwave and Millimeter-Wave Monolithic Circuits Symposium, 1996. Digest of Papers., IEEE 1996
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
0-7803-3360-8
DOI :
10.1109/MCS.1996.506335
