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Wideband VCO with triple tuned circuits in C-Ku band

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7 Author(s)
Tsuru, M. ; Mitsubishi Electr. Corp., Kamakura, Japan ; Kawakami, K. ; Tajima, K. ; Miyamoto, K.
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This paper describes a wide-band voltage controlled oscillator (VCO) with the triple oscillation bandwidth and a better flatness of the phase noise in the oscillation bandwidth using triple varactor-tuned circuits. Altering capacitances of varactor diodes connected to every ports of a HBT in the same direction, the oscillation bandwidth of more than 1.5 octaves has been obtained. A fabricated VCO employing the triple-tuned circuits and a GaAs HBT has covered 1.56 octaves bandwidth achieving the phase noise of -114.9 dBc/Hz ±2.9 dB at 1 MHz offset from the carrier and the output power of 3.4dBm ±2 dB in C-Ku band.

Published in:

Microwave Symposium Digest, 2005 IEEE MTT-S International

Date of Conference:

12-17 June 2005