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A Novel Full Phase-Coherent Frequency Synthesis Method for SFWF Radar Application

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5 Author(s)
Mingzhou Zhan ; EHF Key Laboratory of Fundamental Science, University of Electronics Science and Technology of China, Chengdu, China ; Xiaoqiang Xie ; Hongfei Yao ; Ruimin Xu
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A novel method of full phase-coherent synthesis is proposed in this paper, which uses the frequency-converting technology and the phase-locked loop to fulfill the transmission and tracking of the frequency and phase between the main loop and secondary loops. This method, which differs from the traditional converting-filtering scheme, can solve the tradeoff between the frequency difference and the bandwidth of the full phase-coherent outputs, and it can have a high isolation between the outputs. A Ka-band full phase-coherent frequency synthesizer is implemented based on the idea. The measured results show that this novel full phase-coherent frequency synthesis method proposed in this paper is correct. The frequency synthesizer has full phase-coherent characteristics along with a very low phase noise, fast hopping time, high spurious rejection, and very high isolation between the main output and the secondary output.

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IEEE Transactions on Microwave Theory and Techniques  (Volume:59 ,  Issue: 7 )