In addition, the stop-band rejection can be further increased by using elliptic filter function which has limited frequencytransmission zeros.
另外，在函数类型上使用椭圆函数型，使带外出现有限频率传输零点，进一步提高了带外抑制能力。
2
Analyzed and studied the influence to the radio frequencytransmission performance of PCB board line as right angle line, the different line, Snake-shaped line and so on ;
分析研究了直角走线、差分走线、蛇形线等PCB板电路走线对射频传输性能的影响；
3
Analyzed and studied the parasitic capacity and the inductance effect which the hole produces, Analyzed the influence of PCB board hole to the radio frequencytransmission performance;