为了研究1维3元非磁化等离子体光子晶体的禁带特性，采用传输矩阵法仿真计算了电磁波在1维3元非磁化等离子体光子晶体的传播规律，用计算得到的电磁波透射系数讨论了周期常数、介电常数、介质层厚度和等离子体参量对其禁带特性的影响。结果表明，改变介电常数、介质层厚度和等离子体频率可以实现对带隙的调制，增加周期数和等离子体频率不能实现对禁带的拓展。这一结果为设计1维3元非磁化等离子体光子晶体器件提供了理论参考。

In order to study property of prohibit band gaps in 1-D ternary unmagnetized plasma photonic crystals, the transfer matrix method was applied to simulate the electromagnetic wave propagation through 1-D ternary unmagnetized plasma photonic crystals. Based on the calculated transmission coefficients, effect of periodic constant, dielectric constant, thickness of dielectric layer and parameter of plasma on the property of prohibited band gaps was analyzed. The results illustrate that the band gaps can be tuned by changing dielectric constant, thickness of dielectric layer and plasma frequency, the bandwidth of prohibited band gaps can not be broadened by increasing periodic and plasma collision frequency. The results are good theoretical references to design 1-D ternary unmagnetized plasma photonic crystal devices.