Title :
A monolithic W-band HEMT VCO with feedback topology
Author :
Siweris, H.J. ; Tischer, H. ; Grave, T. ; Kellner, W.
Author_Institution :
Dept. of Corp. Technol., Siemens AG, Munich, Germany
Abstract :
A monolithic voltage-controlled oscillator for automotive radar systems operating in the 76-77 GHz frequency range has been developed. The circuit is based on a feedback topology and consists of a two-stage amplifier, a power divider, and a voltage-controlled phase shifter. It was fabricated using a production-oriented GaAs HEMT technology featuring a gate length of 0.12 /spl mu/m. For oscillation frequencies in the 74-78 GHz range, a minimum output power of 7 dBm and a typical electronic tuning range of 2 GHz have been measured.
Keywords :
HEMT integrated circuits; III-V semiconductors; MMIC oscillators; circuit tuning; feedback oscillators; field effect MIMIC; gallium arsenide; millimetre wave oscillators; road vehicle radar; voltage-controlled oscillators; 0.12 micron; 74 to 78 GHz; EHF; GaAs; MIMIC; automotive radar systems; electronic tuning; feedback topology; monolithic W-band HEMT VCO; power divider; production-oriented GaAs HEMT technology; two-stage amplifier; voltage-controlled oscillator; voltage-controlled phase shifter; Automotive engineering; Circuit topology; Feedback circuits; Frequency; HEMTs; Power amplifiers; Power dividers; Radar; Voltage; Voltage-controlled oscillators;
Conference_Titel :
Microwave Symposium Digest, 1999 IEEE MTT-S International
Conference_Location :
Anaheim, CA, USA
Print_ISBN :
0-7803-5135-5
DOI :
10.1109/MWSYM.1999.779415
