Title :
A tunable 140GHz analog phase shifter with high linearity performance
Author :
Thome, F. ; Diebold, S. ; Schlechtweg, M. ; Leuther, A. ; Ambacher, O. ; Kallfass, I.
Author_Institution :
Fraunhofer Inst. for Appl. Solid State Phys. IAF, Freiburg im Breisgau, Germany
Abstract :
An analog phase shifter for applications around 140GHz is presented. The MMIC is based on our in-house 100nm InGaAs mHEMT technology and has a chip size of 1mm2. The circuit uses two quarter-wavelength transmission lines and two tunable impedances governed by a control voltage. As a result, the signal phase can be controlled stepless with a maximum shift of about 60°. Over the whole tuning range the gain ripple is less than 0.3dB and the phase shifter has a conversion gain of about -3.5dB. Because of its passive topology the circuit shows a very high linearity.
Keywords :
HEMT integrated circuits; III-V semiconductors; MMIC phase shifters; circuit tuning; electric impedance; gallium arsenide; indium compounds; network topology; phase shifters; InGaAs; MMIC; chip size; control voltage; frequency 140 GHz; gain ripple; high linearity performance; mHEMT technology; passive topology; quarter-wavelength transmission line; signal phase; size 100 nm; ttunable analog phase shifter; tunable impedance; tuning range; CMOS integrated circuits; CMOS technology; Epitaxial growth; Imaging; Logic gates; Indium gallium arsenide; Linearity; MMICs; Millimeter wave integrated circuits; Phase shifters;
Conference_Titel :
Microwave Conference (GeMiC), 2012 The 7th German
Conference_Location :
Ilmenau
Print_ISBN :
978-1-4577-2096-3
Electronic_ISBN :
978-3-9812668-4-9
