A SIW planar filter

A filter and plane technology, applied in waveguide-type devices, electrical components, circuits, etc., can solve the problems of large rectangular waveguide, small return loss, large insertion loss, etc., and achieve small internal field influence and good return loss. , the effect of low cost

Pending Publication Date: 2018-12-11
NANJING FORESTRY UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The insertion loss of the traditional filter is relatively large, and the return loss is small, resulting in relatively poor transmission, and the traditional rectangular waveguide is bulky and heavy

Method used

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  • A SIW planar filter
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Embodiment Construction

[0022] The following is based on Figure 1 to Figure 6 The specific embodiment of the present invention is further described:

[0023] see figure 1 and figure 2 , the present embodiment provides a SIW planar filter, which is composed of a three-layer structure, including a top metal foil 1, a dielectric plate 2 and a bottom metal foil 3, and the top metal foil 1, the dielectric plate 2 and the bottom metal foil 3 from above The top layer metal foil 1 and the bottom metal foil 3 are both made of copper foil, the dielectric board 2 is made of F4B material with a relative dielectric constant of 2.65, and the thickness of the dielectric board 2 is 0.508mm.

[0024] see figure 1 , the left side of the top metal foil 1 is provided with the left port microstrip lead-out line 4, the right side is provided with the right port microstrip lead-out line 5 and the left port microstrip lead-out line 4 and the right port microstrip lead-out line 5 are opposite to the top metal foil The ...

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Abstract

The invention discloses an SIW planar filter. The SIW planar filter include a top metal foil, a dielectric plate and a bottom metal foil, the left side of the top metal foil is provided with a left port microstrip lead-out line, A right port microstrip lead-out line is arranged on the right side and the left port microstrip lead-out line and the right port microstrip lead-out line are offset withrespect to the horizontal centerline, a plurality of first metal vias are arranged around the top metal foil, A left metal via hole is arranged on that left side of the center of the top metal foil and a right metal via hole is arranged on the right side, the vertical center line of the top metal foil is provided with a plurality of medium metal vias, The surface of the top metal foil is providedwith a left gap groove, a right gap groove, an upper left metal via hole and an upper right metal via hole, a first metal via hole, a left metal via hole, a right metal via hole, a medium metal via hole, an upper left metal via hole and an upper right metal via hole penetrating the dielectric plate and the bottom metal foil. The invention has the advantages of small volume, light weight, small signal transmission loss, low insertion loss and high echo loss, and improves the transmission performance.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a SIW planar filter. Background technique [0002] In recent years, with the rapid development of wireless communication technology, there are more and more projects involving microwave communication systems. Filters are an indispensable part of modern microwave relay communication, microwave satellite communication, electronic countermeasures and other systems, and are also the most important , Microwave passive devices with the highest technical content. With the development of modern electronic technology, the available spectrum resources are increasingly tight, so the requirements for filter frequency selection characteristics are getting higher and higher. In order to improve the transmission performance of the filter, the filter is required to have low insertion loss and high return loss. More importantly, in order to meet the miniaturization tre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/20H01P1/203
CPCH01P1/20H01P1/203
Inventor 张丹丁振东宗楚菁徐晨月
Owner NANJING FORESTRY UNIV
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