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A Fully Integrated Dual-Frequency Push-Push VCO for Wideband Wireless Applications

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4 Author(s)
Sun, Y. ; Lucent Technologies, Zadelstede 1-10, 3431 JZ Nieuwegein, The Netherlands. Tel: +31-30-6097429, Fax: +31-30-6097498, e-mail: ylsun@lucent.com ; Tieman, T. ; Pflug, H. ; Velthuis, W.

A fully integrated dual-frequency VCO providing not only a high frequency LO signal to transceiver mixers but also a half-LO-frequency signal to a PLL is described. The circuit has 1.2 GHz tuning range at 7 GHz, 25-dB suppression of fundamental-frequency (3.5-GHz) signal at 7-GHz port, and more than 20dB suppression of 7-GHz-signal at 3.5-GHz port. The VCO chip was packaged and resembled on board for phase-noise measurement. A phase noise of - 80 dBc/Hz at 100kHz offset frequency was obtained. This work avoids the use of frequency dividers, hence the chip sizes, power consumption and cost are reduced.

Published in:

Microwave Conference, 2000. 30th European

Date of Conference:

Oct. 2000