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一种新型宽阻带管状带通滤波器的设计
龚文斌
0
(成都天奥电子股份有限公司,成都 611731)
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1.27f0~17f0)。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 (1.27f0~17f0 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 antiinterference 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
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