| 摘要: |
| 为改进原管状带通阻带特性，设计了一种新型结构。基于阻抗匹配，可在端头引入
任意多 “Г型”网络。同时其衰减极点能有效抑制“谐振峰”状寄生，阻带拓宽多达1倍频
程 (现为1.27f0～17f0)。改进后，滤波器具有低插损（小于等于0.77 dB）、轻量
化（小于等于64 g
）、
高寄生抑制（大于等于75 dB）等特点。目前，该滤波器已成功小批量应用，提高了整机抗
干扰性能。在电磁
环境日益复杂的雷达、通信系统中，它将有着广阔的应用前景。 |
| 关键词: 带通滤波器 寄生抑制 宽阻带 管状滤波器 Г型网络 衰减
极点 |
| DOI： |
|
| 基金项目: |
|
| Design of a Novel Wide Stopband Tubular Bandpass Filter |
| GONG Wen-bin |
| () |
| Abstract: |
| A new structure is designed to improve the characteristics of origina
l tubular filter′s stopband. Based on the impedance match, it can be inserted
arbitrary number of Г-type networks at the ports. Meanwhile, its attenuati
on
poles can effectively suppress the spurious of resonance hump. The width of r
ejection is broadened more than one octave （1.27f0～17f0 now）. The imp
rove
d fil
ters with the characteristics of low insert loss（≤0.77 dB）, light weight（≤6
4 g）, high spurious suppression（≥75 dB） are applied in batch at present. T
he
antiinterference ability of machine in which the filter is applied is better.
It has a good application prospe
ct for the radar and communication systems in more and more complex electromagne
t
ic environment. |
| Key words: bandpass filter spurious suppression wide stopband tubular filter Г-type networ
k attenuation pole |
