Title :
A frequency synthesis structure in radar target simulation system with high agility and resolution performance
Author :
Yang, Yuanwang ; Cai, Jingye ; Lianfu, Liu
Author_Institution :
Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
In this paper, an approach of developing high agility and resolution x-band frequency synthesizer for radar target simulation system is proposed. Using the up-conversion of Direct Digital Synthesizer (DDS) output signal to provide the local oscillators and linearly frequency modulated (LFM) signal, with good frequency configuration and optimal utilization of DDS, and high-speed controlling of FPGA (Field Programming Gate Array), the X-band synthesizer implemented in the paper has excellent performance on short frequency switching time under 1us, high frequency resolution of 10KHz, and output bandwidth of 500MHz. The synthesizer´s linearly frequency modulated (LFM) signal bandwidth can be tuned by step of 25 Hz on frequency domain and by step of 10 ns on time domain. The spurious level is better than -70dBc, the phase noise level is better than -90dBc/Hz at 1kHz.
Keywords :
FM radar; direct digital synthesis; field programmable gate arrays; frequency agility; oscillators; phase noise; radar resolution; time-frequency analysis; DDS; FPGA; bandwidth 500 MHz; direct digital synthesizer; frequency 10 kHz; frequency 25 Hz; frequency agility; frequency domain; frequency synthesis structure; linearly frequency modulated signal; local oscillators; phase noise level; radar target simulation system; resolution x-band frequency synthesizer; target resolution; time 1 mus; time domain; Frequency modulation; Frequency synthesizers; Mixers; Radar; Switches; Synthesizers; Time frequency analysis;
Conference_Titel :
Microwave Conference Proceedings (CJMW), 2011 China-Japan Joint
Conference_Location :
Hangzhou
Print_ISBN :
978-1-4577-0625-7
Electronic_ISBN :
978-7-308-08555-7
