Band elimination filter, manufacturing method of band elimination filter and filtering device
A band-stop filter and main body technology, which is applied in the field of filters, can solve problems such as difficult debugging and achieve the effect of easy debugging
Active Publication Date: 2012-12-05
MOBILE ANTENNA TECH SHENZHEN +5
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Problems solved by technology
[0005] The purpose of the embodiments of the present invention is to provide a band-stop filter, aiming to solve the problem of difficulty in debugging the coupling amount and resonance frequency of common band-stop filters in the prior art
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[0024] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0025] In the embodiment of the present invention, since the main transmission rod is arranged on the side of the resonant rod, when the coupling amount is adjusted by the coupling screw, the resonant frequency of each resonant cavity will not be affected, so that when adjusting the coupling amount and the resonant frequency, they are independent of each other. impact, easy to debug, and can converge to the desired index in a short time.
[0026] see Figure 2 to Figure 4 , a band rejection filter provided by an embodiment of the present invention includes:
[0027] The metal cavity main body 6 a...
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The invention is suitable for the field of filters, and provides a band elimination filter, a manufacturing method of the band elimination filter and a filtering device. The band elimination filter comprises a metal cavity main body and a cover plate covering the metal cavity main body, wherein the metal cavity main body is internally provided with cavity walls separating the metal main body intoa plurality of resonant cavities. Each resonant cavity is provided with a window, and is internally provided with a resonant rod. The side face of the resonant rod is provided with a transmission main shaft, and the two ends of the transmission main shaft are installed on the metal cavity main body. A resonant screw which is just opposite to the resonant rod and is used for regulating the resonant frequency of the resonant rod is also arranged on the cover plate, and a coupling screw for regulating the coupled mass between the resonant rod and the transmission main shaft is also arranged on the cover plate or the metal cavity main body. In the invention, since the transmission main rod is arranged at the side face of the resonant rod, the resonant frequency of each resonant cavity can notbe influenced when the coupled mass is regulated by the coupling screw. Therefore, mutual influence is avoided when the coupled mass and the resonant frequency are regulated, the debugging is easy, and needed indexes can be converged within a short time.
Description
technical field [0001] The invention belongs to the field of filters, and in particular relates to a band-stop filter, a manufacturing method of the band-stop filter and a filter device. Background technique [0002] At present, with the rapid development of wireless communication technology, the design of cavity filter is becoming more and more mature. Due to the limitations of design errors and manufacturing precision, the current filter production, especially the production of stop-band filters in mobile communications requires a lot of debugging work, which has become a bottleneck in large-scale production in terms of production cost and production schedule. [0003] Because of its own structure and realization principle, the band-stop filter makes debugging more complicated. Common band-stop filters in the prior art, such as figure 1 As shown, a common band stop filter includes a metal cavity main body 1, a resonant rod 3 and a transmission main rod 2 are installed in ...
Claims
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IPC IPC(8): H01P1/208H01P11/00
Inventor 刘宁刘磊
Owner MOBILE ANTENNA TECH SHENZHEN