基于光子带隙的双平板太赫兹传输系统研究

Study on Parallel-plane THz Transmission System Based on Photonic Band Gap

研究了一种利用光子晶体带隙特性工作的双平板太赫兹传输系统,它结合了光子晶体波导传输能量集中、损耗低以及双平板波导低色散和单模传输的优点。具体设计了工作在0.32THz的传输系统,研究结果表明:光子晶体双平板波导不但可以实现单模的高效传输,而且也具有良好的输入输出匹配性能。该设计中,采用矩形波导的输入输出结构在316～360GHz的带宽内可以获得S11<-10dB的匹配。而且,和普通双平板波导相比更具有结构紧凑、易于集成等优点,因此具有较高的实用价值。

Based on the properties of photonic crystal band gap, a kind of parallel-plane THz transmission system is studied. The system combines the advantages of transmission energy concentration, low loss in photonic crystal waveguide, low group velocity dispersion and single- mode transmission in parallel-plane waveguide. In this paper, a transmission system operating at the frequency of 0.32 THz is designed. Investigations reveal that photonic crystal parallel-plane waveguide not only can realize the high efficiency transmission of single-mode, but also possesses the excellent matching performance of in-output. The in-output structure of rectangle waveguide which can acquire the match of S11〈-10 dB in the frequency range of 316-360 GHz is adopted in the design. Moreover, compared to the normal parallel-plane waveguide, it has the advantages of compact structure and easier integration, therefore, more practical value.