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A PLL-stabilized W-band MHEMT push-push VCO with integrated frequency divider circuit

Ein PLL-stabilisierter W-Band MHEMT Push-Push VCO mit integriertem Frequenzteilerschaltkreis
: Weber, R.; Kuri, M.; Lang, M.; Tessmann, A.; Seelmann-Eggebert, M.; Leuther, A.


Institute of Electrical and Electronics Engineers -IEEE-:
IEEE MTT-S, International Microwave Symposium Digest 2007. CD-ROM : 3-8 June 2007, Honululu/Hawai
Piscataway, NJ: IEEE, 2007
ISBN: 1-4244-0688-9
International Microwave Symposium Digest <2007, Honolulu/Hawai>
Fraunhofer IAF ()
frequency divider; Frequenzteiler; metamorphic high electron mobility transistor; metamorpher Transistor mit hoher Elektronenbeweglichkeit; phased locked loop; PLL; Phasenregelschleife (PLL); push-push oscillator; Push-Push-Oszillator; voltage controlled oscillator; spannungsgesteuerter Oszillator; VCO; W-Band; coplanar waveguide; koplanare Wellenleiter

In this paper, a PLL-based stabilization technique for monolithic integrated W-band voltage controlled oscillators (VCOs) is presented. A 92 GHz push-push oscillator in coplanar waveguide technology and a frequency divider by eight were developed and integrated on a single MMIC using our established 100 nm metamorphic HEMT technology. The oscillator achieves a tuning range of 3.4 GHz around the center frequency of 92 GHz and an output power of more than 5.5 dBm. By applying this concept, the VCO was synchronized to a low frequency reference signal at 180 MHz using a commercially available PLL circuit. Compared to the free running oscillator, the phase-noise was improved by 24 dB to 77 dBc/Hz at 100 kHz offset from the carrier.