Frequency Sources in W-band Radar Front-end with Low Phase Noise |
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| Authors: | Yonghong Zhang Xiaohong Tang Yong Fan and Zhengde Wu |
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| Institution: | (1) School of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu, 610054, China |
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| Abstract: | A W-band coherent stepped-frequency pulsed radar front-end is developed. It consists of a millimetre wave transmitting source,
a mm-wave local source, a DDS with multi frequency points output and two microwave sources serving as local oscillators. All
the sources are coherent with the 120 MHz referenced crystal oscillator. The mm-wave sources are realized by frequency multiplier
chain, up-conversion and injection locking. The phase noise of fundamental-wave injection-locked W-band harmonic Gunn oscillator
output signal achieves −98 dBc/Hz at 10 kHz offset and the spurious output is less than −50 dBc. The received intermediate
frequency signal is also presented. |
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| Keywords: | Phase noise Frequency multiplier Injection locking Millimeter wave Frequency source Radar |
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