Title :
W-Band HEMT-Oscillator with Stabilization by Phase Controlled Subharmonic Injection Locking
Author :
Kudszus, S. ; Haydl, W.H. ; Neumann, M. ; Hülsmann, A.
Author_Institution :
Fraunhofer Institute for Applied Solid State Physics (IAF), Tullastr. 72, D-79108 Freiburg, Germany. eMail: kudszus@iaf.fhg.de
Abstract :
A coplanar subharmonic injection locked W-band HEMT VCO with an integrated varactor diode and buffer amplifier was developed, achieving a tuning range of 10 GHz and an output power of 8 dBm at 94 GHz. The oscillator was stabilized by subharmonic injection locking to reduce phase noise and simultaneously by an external phase-locked-loop (PLL) circuit to compensate for temperature drift. The locking range of the system was extended to 1 GHz by the use of the PLL circuit.
Keywords :
Circuit optimization; Diodes; HEMTs; Injection-locked oscillators; Phase locked loops; Power amplifiers; Power generation; Tuning; Varactors; Voltage-controlled oscillators;
Conference_Titel :
Microwave Conference, 1999. 29th European
Conference_Location :
Munich, Germany
DOI :
10.1109/EUMA.1999.338307
