像传输线那样,可以测试任何一种滤波器或陷波器的阻抗和频率响应。滤波器在其带宽内应该具有等于输入激励源阻抗和负载阻抗的输入阻抗和输出阻抗。为了测试阻抗,可以进行开路测试和短路测试。为了更加了解这种测试,请考虑图2.43滤波器或传输线的电路图。该电路图为平衡 Like the transmission line, you can test the impedance and frequency response of any filter or trap. The filter should have input impedance and output impedance equal to the input excitation source impedance and load impedance within its bandwidth. In order to test the impedance, open-circuit test and short-circuit test can be carried out. To learn more about this test, consider the circuit diagram of the filter or transmission line in Figure 2.43. The circuit diagram is balanced