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A 60-GHz-band subharmonically injection locked VCO MMIC operating over wide temperature range

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6 Author(s)
Kishimoto, S. ; Syst. Devices Res. Labs., NEC Corp., Shiga, Japan ; Maruhashi, K. ; Ito, M. ; Morimoto, T.
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A 60-GHz-band subharmonically injection locked VCO MMIC is developed for a local signal source. The VCO outputs a 2nd harmonic of an oscillating frequency, using a 2nd subharmonic as an injection signal to obtain a high output power and a wide locking range. The overall frequency multiplication factor is 4. Besides, to suppress an oscillating frequency fluctuation against an ambient temperature change, a simple temperature-compensation bias circuit is connected to a varactor diode. It is tested mounting on an LTCC package by a flip-chip technique. A locking range of 760 MHz and an output power of 1 dBm are obtained at the injection power of 2 dBm. For a temperature range from 0°C to 80°C, a locking range reaches to 450 MHz due to the temperature-compensation bias circuit.

Published in:

Microwave Symposium Digest, 2005 IEEE MTT-S International

Date of Conference:

12-17 June 2005