Coaxial feed slot antenna with metal through holes of step impedance

A step impedance, metal via technology, applied in slot antennas, antennas, antenna grounding devices, etc., can solve the problems of large slot impedance, antenna cross-polarization deterioration, spectral efficiency and channel capacity reduction, etc. Small electrical size, suppression of cross-polarization, and miniaturization effects

Inactive Publication Date: 2016-06-15
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

A larger metal ground will make the slot antenna unsuitable for multiple-input multiple-output (MIMO) applications, resulting in poor cross-polarization of the antenna, which will lead to a decrease in spectral efficiency and channel capacity
At the same time, the impedance of the slot is very large, which also makes the impedance matching of the slot antenna feeding transmission line more difficult.

Method used

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  • Coaxial feed slot antenna with metal through holes of step impedance

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Embodiment Construction

[0014] The present invention will be further described below in conjunction with drawings and embodiments.

[0015] The embodiment adopted by the present invention is: the slot antenna of coaxial feed metal via hole step impedance comprises a dielectric substrate 1, a metal ground 2 arranged on the dielectric substrate 1, a radiation slot 3, and a coaxial feeder 4; the dielectric substrate 1 One side is the metal ground 2, the outer conductor 5 of the coaxial feeder 4 is connected to the metal ground 2; there is a radiation slot 3 on the metal ground 2, the shape of the radiation slot 3 is rectangular, and the radiation slot 3 is located on the metal ground 2 The center of the radiation slot 3; the two ends 6 of the radiation slot 3 are short-circuited; in the middle part of the radiation slot 3, there are two rows of metallized via hole 7 arrays on the two edges of the slot, so that the characteristic impedance of the middle part of the radiation slot 3 changes low, forming a...

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Abstract

The invention relates to a coaxial feed slot antenna with metal through holes of step impedance. The antenna comprises a dielectric substrate (1), a metal ground (2) on the dielectric substrate (1), a radiation slot (3) and a coaxial feed line (4); the radiation slot (3) is arranged in the metal ground (2); the two ends of the radiation slot (3) are shorted; two rows of metal through hole (7) arrays in the middle portion of the radiation slot (3) for a low-resistance slot (8); residual part of the radiation slot (3) is a high-resistance slot (9); and an outer conductor (5) of the coaxial feed line (4) is connected with the metal ground (2), and an internal conductor (12) at the tail end of the coaxial feed line (4) is connected with the metal ground (2) by crossing edges (11) of the high-resistance slot (9). The antenna works in a multiband manner, the size of the antenna is reduced, cross polarization and shielding are realized, and isolation is improved.

Description

technical field [0001] The invention relates to a slot antenna, in particular to a slot antenna with step impedance of a coaxial feeding metal via hole. Background technique [0002] The slot antenna is the dual antenna of the dipole antenna and has a wide range of applications. However, the ordinary slot antenna not only needs half the wavelength of the radiation slot itself, but also needs a large metal ground area around the radiation slot, usually the length of the metal ground is 1 / 2 larger than the length of the slot One wavelength, the width of the metal ground is one-half wavelength larger than the width of the slot. A larger metal ground will make the slot antenna unsuitable for multiple-input multiple-output (MIMO) applications, resulting in poor cross-polarization of the antenna, which will lead to a decrease in spectral efficiency and channel capacity. At the same time, the impedance of the slot is very large, which also makes it difficult to match the impedanc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/38H01Q1/48H01Q13/10H01Q5/10
CPCH01Q1/38H01Q1/48H01Q5/10H01Q13/10
Inventor 赵洪新齐宏业殷晓星
Owner SOUTHEAST UNIV
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