Semi-slot antenna with coaxial feed capacitor-loaded step impedance

A step impedance and capacitive loading technology, which is applied in the direction of antennas, slot antennas, antenna grounding devices, etc., can solve problems such as large slot impedance, poor cross-polarization of antennas, decline in spectral efficiency and channel capacity, and achieve cross-over suppression Effects of polarization, miniaturization, and electrical size reduction

Inactive Publication Date: 2016-08-24
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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  • Semi-slot antenna with coaxial feed capacitor-loaded step impedance

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Embodiment Construction

[0013] The present invention will be further described below in conjunction with drawings and embodiments.

[0014] The embodiment that the present invention adopts is: the half-slot antenna that the coaxial feeding capacitor loads 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 One side of 1 is the metal ground 2, and 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, and the shape of the radiation slot 3 is rectangular, and the radiation slot 3 is located on the metal ground 2; one end of the radiation slot 3 is short-circuited, and the other end 6 is open; in the part of the radiation slot 3 close to the open circuit end, several capacitors 7 are connected in parallel across the two edges of the radiation slot 3, so that the radiation slot 3 is close to The character...

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PUM

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Abstract

The invention discloses a semi-slot antenna with coaxial feed capacitor-loaded step impedance, which relates to a slot antenna. The antenna comprises a dielectric substrate (1), a metal ground (2) and a radiation slot (3) on the dielectric substrate (1) and a coaxial feed line (4), wherein the metal ground (2) is provided with the radiation slot (3); one end of the radiation slot (3) is short-circuited and the other end (6) is open-circuited; the part, close to the open-circuited end, of the radiation slot (3) is provided with a plurality of capacitors (7) in parallel bridge connection onto the edge to form a low-impedance slot (8); the rest part of the radiation slot (3) is a high-impedance slot (9); an outer conductor (5) of the coaxial feed line (4) is connected with the metal ground (2); and the tail inner conductor (12) of the coaxial feed line (4) passes across the high-impedance slot (9) to be connected with the metal ground (2) at the edge (11). The antenna works under multiple frequency bands, and the antenna size and the cross polarization can be reduced.

Description

technical field [0001] The invention relates to a slot antenna, in particular to a half-slot antenna with step impedance loaded by a coaxial feeding capacitor. 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 i...

Claims

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Application Information

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IPC IPC(8): H01Q1/38H01Q1/48H01Q1/50H01Q5/10H01Q5/307H01Q5/321H01Q13/10
CPCH01Q1/38H01Q1/48H01Q1/50H01Q5/10H01Q5/307H01Q5/321H01Q13/10
Inventor 赵洪新刘艳群殷晓星
Owner SOUTHEAST UNIV
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