【摘要】 微波等离子体灯是利用微波能激发等离子体发光的新型光源。微波等离子灯射频模块的工作频率是在420~470MHz范围内可调,其输出功率平坦度越小越好。基于锁相环频率合成原理,使用ADI公司的集成芯片ADF4350设计了满足要求的频率源。最终通过设计PCB、制板、电装并调试制作了满足要求的频率源的。最终测试结果表明,输出平均功率为5dBm,功率平坦度小于0.2dB,杂散抑制在50dBc以上。更多还原

【Abstract】 Microwave sulfur lamp is new light source using microwave plasma.The RF module’s frequency is working from 420 MHz to 470 MHz and the power flatness smaller is better.Using the integrated phase locded loop(PLL)chip ADF 4350 designed the sweep signal source which meet the requirements based on the theory of PLL synthesizer.The frequency is finally completed after PCB designing,circuit board manufacturing,assembling and debugging.The final test results show that the average power is 5 dBm,power flatness is less than 0.2 dB and the spurious suppression is above 50 dBc.更多还原