为了调节极窄带滤波器的带宽, 提出了一种新型的AWLR混合滤波器, 此结构引入导抗逆变器对滤波器的带宽进行调节, 该文对其调节带宽的原理和准则进行了研究。分析二端口网络的参数矩阵, 将引入导抗逆变器前后的电路网络参数进行比较, 得到其调节带宽的准则。比较引入不同逆变器后的仿真结果, 并进行验证。以J=1/123的J型逆变器为例, 引入逆变器后, 滤波器的相对带宽从0.072%提高到0.41%。获得导抗逆变器调节AWLR混合滤波器带宽的准则, 并验证了其正确性。

In order to adjust the bandwidth of extremely narrow band filter, a novel hybrid acoustic-wave-lumped-element resonator(AWLR) filter is proposed in this paper. In this structure, the immittance inverter is introduced to adjust the bandwidth of the filter. The principle and criteria of its bandwidth adjustment are investigated. The parameter matrix of the two-port network is analyzed and the circuit network parameters before and after introducing into the immittance inverter are compared to obtain its criteria for adjusting the bandwidth. The simulation results after introducing different inverters are compared and verified. Taking the J-type inverter with J=1/123 as an example, the relative bandwidth of the filter is increased from 0.072% to 0.41% after introducing the inverter. The criteria for adjusting the bandwidth of hybrid AWLR filter are obtained and its correctness is verified.