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A Compacted Ultra-fast Ka-band Frequency Synthesizer for Millimeter Wave Seeker  

Lim, Ju-Hyun (Samsung Thales Radar Research Institute)
Yang, Seong-Sik (Samsung Thales Radar Research Institute)
Song, Sung-Chan (Samsung Thales Radar Research Institute)
Publication Information
Journal of the Institute of Electronics Engineers of Korea TC / v.49, no.1, 2012 , pp. 85-91 More about this Journal
Abstract
In this paper, we implemented a Ka-band frequency synthesizer for millimeter wave seeker. we designed for high frequency resolution and frequency hopping response time in the digital synthesis method which uses DDS(Direct Digital Synthesizer). but frequency bandwidth was limited low frequency because DDS output frequency was limited 1/2 by system clock. thus, frequency synthesizer was converted to Ka-band using the frequency multiplier ${\times}4$ and local oscillator. proposed frequency synthesizer was bandwidth 500MHz, frequency switching time was $0.7{\mu}s$, spurious level was suppressed below -52dBc. phase noise was -99dBc/Hz at offset 100kHz and flatness was ${\pm}1dB$.
Keywords
Phase noise; Switching time; DDS; PLL; spurious;
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