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A new approach for a phase controlled self-oscillating mixer
Journal article   Peer reviewed

A new approach for a phase controlled self-oscillating mixer

Xue-Song Zhou, Xiangdong Zhang and Afshin Daryoush
IEEE transactions on microwave theory and techniques, v 45(2)
01 Feb 1997
DOI: https://doi.org/10.1109/22.557600

Abstract

The analytical and experimental demonstration of subharmonic synchronization and phase shifting of a push-pull self-oscillating mixer is presented. Inherent high mixing gain of the self-oscillating mixer circuit is exploited to generate a strong signal at the same frequency of the reference signal, which is related to the local oscillator's phase information. A phase error between this signal and the reference signal is extracted in a phase comparator before phase locking. Analytical modeling of frequency and phase stabilization of the push-pull self-oscillating mixer is presented, which is also experimentally verified for a self-oscillating mixer at 12 GHz. This self-oscillating mixer circuit demonstrates efficient phase locking, 0-180-deg continuous phase shifting capability in addition to the reported large locking range, low close-in to carrier phase noise, and a high mixer conversion gain. The demonstrated subharmonic phase locking approach replaces the need for a frequency multiplier or divider before the phase comparator. The synchronized push-pull self-oscillating mixer circuit is applicable to the millimeter-wave frequency distributed transmitters and receivers, where low-loss phase shifting and efficient subharmonic phase and frequency locking are hard to achieve. (Author)

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Engineering, Electrical & Electronic
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