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Planar realization of low phase noise 15/30 GHz oscillator/doubler using surface mount transistors

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3 Author(s)
Wen-chang Lee ; Inst. of Electr. Commun. Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan ; Shao-cheng Lin ; Tzuang, C.-K.C.

This paper presents the application of a novel high-Q planar waveguide resonator for microwave oscillator design. The waveguide cavity is made in printed-circuit-board process, first using a routed cut followed by a plated via-through-hole. Measurements show that the oscillator stabilized by the resonator delivers an output power of 14 dBm at 15 GHz and a phase noise of -98 dBc/Hz at 100 kHz offset from the carrier, under 5-V single bias. Experiments indicate the predominance of the waveguide resonator by a 13-dB phase noise improvement at 100 kHz offset against the microstrip oscillator.

Published in:

Microwave and Wireless Components Letters, IEEE  (Volume:13 ,  Issue: 1 )