Folding filter

A filter and rectangle technology, applied in the field of filters, can solve the problems of adding silver plating and gold plating to the filter, increasing the manufacturing cost of the filter, and difficult to shorten the length of the filter, etc., to achieve high utilization value, shorten the length, and improve the phase linearity. degree of effect

Inactive Publication Date: 2012-09-05
成都赛纳赛德科技有限公司
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] First, the length of the filter is the sum of the length of each rectangular resonator and the thickness of each inductor diaphragm, so the length of the filter is difficult to shorten;
[0004] Second, due to the use of the inductance diaphragm and the influence of its parasitic passband, its out-of-band suppression ability is heterogeneous at the high end of the passband compared to the low end;
[0005] Third, when the filter is divided into the base and the upper cover plate, it is necessary to add fixing screws near the upper opening of the inductor diaphragm to ensure good electrical contact between the bottom of the cover plate and the upper part of the inductor diaphragm. , will have to increase the thickness of the inductance diaphragm, resulting in an increase in the length of the filter, or welding the filter base and the upper cover, resulting in additional silver plating, gold plating and other processing procedures for the filter, which greatly increases the manufacturing cost of the filter

Method used

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Embodiment

[0022] Such as figure 1 As shown, the folded filter includes an input waveguide 1, an output waveguide 2 and seven rectangular resonators 3. The line connecting the center points of three adjacent rectangular resonant cavities 3 forms a "V" shape with an angle less than 50 degrees. In each of the three rectangular resonant cavities that form a "V" shape, two rectangular resonant cavities 3 on the same side have an overlapping angle with the other rectangular resonant cavity, and the overlapping angles constitute two The coupling channels between the rectangular resonators, and all the coupling channels are connected through the corresponding rectangular resonant cavities 3 to form the main coupling channel of the entire filter. A rectangular metal boss 5 is arranged in the second rectangular resonant cavity 3 . The metal boss 5 is only connected to the rectangular resonant cavity 3 at the bottom. A cross-coupling structure 4 is provided between any two adjacent but not over...

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Abstract

The invention discloses a folding filter belonging to the technical field of microwave communication and mainly solving the problem that the miniaturization of a filter is conflicted with the enhancement of the external inhibition capacity of the filter in the prior art. The folding filter comprises input structures, output structures and rectangular resonant cavities, wherein the input structures and the output structures are respectively arranged on both ends of the rectangular resonant cavities. The folding filter is characterized by comprising at least three rectangular resonant cavities,the central points of the adjacent three rectangular resonant cavities are connected into a V shape, and two rectangular resonant cavities positioned at the same side respectively have coincided angles with the other rectangular resonant cavity. The invention has small length, few assembly processes and good high-end inhibition, can be widely used for electric systems, such as a satellite television receiving system, a satellite communication system, a radar, and the like.

Description

technical field [0001] The invention relates to a filter, in particular to a folded filter in which the connecting lines between the centers of adjacent resonant cavities are broken lines. Background technique [0002] The miniaturization of filters is a classic research topic in the field of microwave electromagnetic fields. Ordinary direct-coupled cavity filters use inductive diaphragms to connect rectangular resonant cavities, which have the advantages of low insertion loss, large power capacity, and easy processing. However, this filter also has the following weaknesses: [0003] First, the length of the filter is the sum of the length of each rectangular resonator and the thickness of each inductor diaphragm, so the length of the filter is difficult to shorten; [0004] Second, due to the use of the inductance diaphragm and the influence of its parasitic passband, its out-of-band suppression ability is heterogeneous at the high end of the passband compared to the low ...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): H01P1/208
Inventor王清源任屹灏向元彬
Owner成都赛纳赛德科技有限公司