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较详细介绍了一种X波段宽带频率合成器的设计,此合成器具有大宽带、快捷变、低相位噪声等特点。设计方案采用高稳定恒温晶体振荡器结合直接频率合成技术。合理的接口设计和电路优化实现了低杂散输出和微型化集成,并给出了设计结果,输出频率X波段,带宽3GHz,步进10MHz,跳频时间3us,相位噪声-105dBc/Hz@1kHz。
The design of an X-band broadband frequency synthesizer is introduced in detail. The synthesizer has features of large broadband, fast transition and low phase noise. The design uses a high-stability, constant-temperature crystal oscillator combined with direct frequency synthesis. Reasonable interface design and circuit optimization to achieve a low spurious output and miniaturization integration, and gives the design results, the output frequency X band, bandwidth 3GHz, step 10MHz, frequency hopping time 3us, phase noise -105dBc / Hz @ 1kHz .