140GHz二倍频器的研制

Implementation of 140 GHz frequency doubler

太赫兹通信中本振链输出功率无法满足实际需求,因此提出一种基于肖特基变容二极管的宽带、高效率140 GHz二倍频器设计方案。该倍频器结构基于波导腔体石英基片微带电路的混合集成方式实现。采用三维有限元与非线性谐波平衡联合仿真方法,实现了倍频器的最优化设计。根据仿真结果,完成了140 GHz二倍频器的加工、制作与测试工作。实测结果表明,在20 dBm的驱动功率下,倍频器的输出功率最高达6.6 mW,倍频效率7.15%;输入功率23 dBm对应的最大输出功率可达11.2 mW。该器件的成功研制使得实现太赫兹通信中的本振链成为可能。

Terahertz frequency multiplier is the critical component of the terahertz communication and radar system. The structure and simulation of a wideband, high efficiency 140 GHz Schottky varactors frequency doubler are presented. The doubler is based on quartz microstrip circuit integrated in waveguide cavity. Wideband electromagnetic coupling structures are designed for various sections of frequency doubler. Cosimulation of three-dimensional finite element calculator with nonlinear harmonic balance tool is utilized to achieve the optimal doubler design. According to the simulation results, a 140 GHz doubler is fabricated and tested. The test results indicates： under 20 dBm of driving power, the output power of frequency doubler is up to 6.6 mW with efficiency up to 7.15%; the maximum output power can reach 11.2 mW under 23 dBm of driving power. The successful development of the doubler has solved a problem that the output power of terahertz communication local oscillator chain could not meet the actual requirements before.