Title :
Conditions for broadband MMIC voltage-controlled oscillators based on theory and experiments
Author :
Megej, A. ; Beilenhoff, K. ; Hartnagel, H.L.
Author_Institution :
Inst. fur Hochfrequenztech., Tech. Hochschule Darmstadt, Germany
Abstract :
A systematic study of maximally broadband VCO designs is undertaken. The theoretical investigations lead to the practical realization of two fully monolithically integrated VCOs based on reflection-type and feedback design techniques. Employing efficient diode tuning, the practical implementations of PHEMT-MMICs exhibit a variation of output frequency of 30% and 45%, respectively.
Keywords :
HEMT integrated circuits; MMIC oscillators; circuit tuning; feedback oscillators; field effect MMIC; voltage-controlled oscillators; broadband PHEMT MMIC VCO; circuit design; diode tuning; feedback oscillator; reflection-type oscillator; Active circuits; Capacitance; Circuit optimization; Circuit topology; Feedback loop; Frequency; MMICs; Microwave oscillators; Transconductance; Voltage-controlled oscillators;
Conference_Titel :
Microwave Symposium Digest, 2001 IEEE MTT-S International
Conference_Location :
Phoenix, AZ, USA
Print_ISBN :
0-7803-6538-0
DOI :
10.1109/MWSYM.2001.967168
