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根据复合左右手传输线(CRLH TLs)在实现双频微波器件领域的独特优势,设计实现了一个微带结构双频带通滤波器(BPF)。通过设计CRLH TLs的参数,可以任意选取双频滤波器两个通带的中心频率。文中给出了一个中心频率为1.47GHz和2.3GHz的双频带通滤波器设计实例,并通过仿真和实验结果验证设计方法的有效性。利用CRLH TLs设计双频器件,可以在实现双频工作同时保持结构的紧凑性,具有很好的工程应用价值。
According to the unique advantages of CRLH TLs in dual-band microwave devices, a microstrip bandpass filter (BPF) is designed and implemented. By designing the parameters of the CRLH TLs, the center frequencies of the two passbands of the dual-band filter can be arbitrarily selected. A design example of dual-band bandpass filter with center frequencies of 1.47GHz and 2.3GHz is given in this paper. The simulation results and the experimental results verify the effectiveness of the design method. The use of CRLH TLs design of dual-band devices, dual-band work can be achieved while maintaining the compact structure, with good engineering value.