Frequency Sources in W-band Radar Front-end with Low Phase Noise |
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| Authors: | Yonghong Zhang Xiaohong Tang Yong Fan Zhengde Wu |
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| Affiliation: | 1.School of Electronic Engineering,University of Electronic Science and Technology of China,Chengdu,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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