Utilize cavity filter of two coaxial impedance techniques

一种利用双同轴阻抗技术的腔体滤波器

Abstract

The utility model relates to a cavity filter, concretely relates to utilize cavity filter of two coaxial impedance techniques. Because among the prior art, the volume of uniform impedance syntonizer is great, the nonloaded Q of disc loading technique and step impedance syntonizer is lower, leads to the insertion loss of wave filter great. In order to solve the problems, the utility model provides a wave filter, its characteristics are exactly the conductor at a barrel structure of column inner conductor open end increase of syntonizer, and the column inner conductor is visited this conductor and is connected rather than the bottom. The setting of this special structure is compared the uniform impedance syntonizer and has been had more two degrees of freedom, and compare step impedance syntonizer and had more the one degree of freedom, so the utility model discloses a resonance length can be shorter, can reduce the size of wave filter, simultaneously the utility model discloses improve into beta -barrel structure to the terminal part of step impedance syntonizer column inner conductor, obviously greatly increased the energy storage space of syntonizer, therefore the nonloaded Q is lower, insertion loss reduces.
本实用新型涉及腔体滤波器,具体涉及一种利用双同轴阻抗技术的腔体滤波器。由于现有技术中,均匀阻抗谐振器的体积较大,圆盘加载技术以及阶跃阻抗谐振器的无载Q值较低,导致滤波器的插入损耗较大。为了解决上述问题,本实用新型提供一种滤波器,其特点就是在谐振器的柱状内导体开路端增加一个桶装结构的导体,且柱状内导体探入该导体并与其底部相连接。该特异结构的设置,相比均匀阻抗谐振器多了两个自由度,相比阶跃阻抗谐振器多了一个自由度,所以本实用新型的谐振长度会更短,可以缩小了滤波器的尺寸;同时本实用新型把阶跃阻抗谐振器柱状内导体末端部分改进成桶状结构,显然大大增加了谐振器的储能空间,因而无载Q值较低,插入损耗降低。

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