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Fundamental W-band InP DHBT-based VCOs with low phase noise and wide tuning range

Fundamentaler InP-DHBT basierender W-Band-VCO mit niedrigem Phasenrauschen und hoher Tuningsbandbreite
: Makon, R.E.; Driad, R.; Schneider, K.; Aidam, R.; Schlechtweg, M.; Weimann, G.


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>
Conference Paper
Fraunhofer IAF ()
InP-DHBT; VCO; phase noise; Phasenrauschen; voltage controlled oscillator; spannungsgesteuerter Oszillator

In this paper, fundamental W-band voltage controlled oscillators (VCOs) featuring low phase noise and wide tuning range are reported. These monolithically integrated circuits (ICs) are fabricated using an InP/InGaAs DHBT technology, exhibiting cut-off frequency values of more than 250 GHz for both fT and fmax. The VCOs in differential topology consist of an oscillator core according to the negative resistance type and an ac-coupled output buffer. A first VCO version features operation frequencies ranging between 88 GHz and 100 GHz. Within this tuning range, phase noise values down to 90 dBc/Hz have been achieved at 1 MHz offset frequency, while single-ended output power values up to +4 dBm were measured, resulting in a total signal power of +7 dBm. A second VCO version shows operation frequencies between 101 GHz and 109 GHz. Within this frequency operation interval, phase noise values down to 88 dBc/Hz have been achieved at 1 MHz offset frequency, while a single-ended output power up to +2 dBm was measured, i.e. a total available signal power of +5 dBm.