基于多边带拍频实现高功率毫米波方法

Optical High-Power Millimeter-Wave Generated by Multiple-Sidebands

研究了一种多边带拍频产生多倍频、高功率毫米波的方法,并提出了相应的交错复用模块结构。该模块无需额外光滤波器件和复杂电路驱动,通过器件参数设置生成间隔可调的周期边带信号。理论分析表明,多个边带相互拍频并叠加最终形成毫米波信号,信号能量更为集中,且信号频率具有可调性。实验结果显示,多边带调制方法可实现12倍频、16倍频甚至18倍频毫米波信号,而且输出信号体现出明显高功率特性,相对典型双边带调制输出信号功率提高了20dB以上。根据系统仿真结果,多边带拍频光纤无线系统还具备较好的传输稳定性和抗色散能力,更适合长距离传输。

A method about multiple-sidebands beat is studied to produce a series of high-power millimeter-wave, and interleaver module is proposed. For the module without additional optical filter and complex circuit driver, periodical sideband signals generated by parameters setting are tunable. Theoretical analysis demonstrates that multiple- sidebands beat with each other, the millimeter wave signal is formed by superposition ultimately, the signal energy is more concentrated, and the frequency is tunable. Simulation results indicate that multiple-sidebands modulation method can generate 12-tupling, 16-tupling, even 18-tupling millimeter waves, and output signals reflect high power characteristics obviously. In comparison with typical bi-sideband modulation method, the power of millimeter wave signal is improved by more than 20 dB. According to the results of the system simulation, the proposed radio-over- fiber （RoF） system has better performance on transmission and anti-dispersion, and it is more suitable for long- distance transmission.