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: |
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基金项目: |
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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 |