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A Simple Low-Noise Subharmonically Injection-Locked Oscillator for Low-Cost RF Synthesizers and Front-Ends for Wireless Communications

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2 Author(s)
Tarar, M.A. ; Dept. of Electr. & Comput. Eng., Dalhousie Univ., Halifax, NS ; Zhizhang Chen

In this paper, a simple 2.095 GHz subharmonically injection-locked oscillator (ILO) using HBT transistor is presented. A subharmonic signal of 1.0475 GHz frequency is injected to the oscillator to lock the oscillation at 2.095 GHz. With the capacitive feedback impedance at the transistor emitter, and inductive load and the resonator at the transistor base, a low phase noise of -92 dBc/Hz at the WKHz offset was obtained. Simulation results show that the phase noise of the oscillation output is only about 0.5 dB higher than that of the injected signal. Such a low noise feature has presented potentials in developing RF synthesizer and front-ends for low-cost wireless and mobile communication transceivers.

Published in:

Communication Networks and Services Research Conference, 2008. CNSR 2008. 6th Annual

Date of Conference:

5-8 May 2008