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Capacitor-loaded stepped impedance type tri-polarization half-slot antenna

A technology of step impedance and capacitive loading, applied in antennas, slot antennas, antenna coupling, etc., can solve the problems of difficulty in impedance matching of slot antenna feed transmission lines, reduction of spectral efficiency and channel capacity, and deterioration of antenna port isolation. Achieve the effect of miniaturization, improved isolation, and reduced electrical size

Inactive Publication Date: 2016-07-06
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A large metal ground will have a shielding effect on the radiation of the antenna, making the slot antenna unsuitable for co-located multiple-input multiple-output (MIMO) applications, especially when used as a multi-polarized antenna, a large metal ground will cause the antenna to Poor cross-polarization, poor isolation between antenna ports, 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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  • Capacitor-loaded stepped impedance type tri-polarization half-slot antenna
  • Capacitor-loaded stepped impedance type tri-polarization half-slot antenna

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Embodiment Construction

[0015] The present invention will be further described below in conjunction with drawings and embodiments.

[0016] The embodiment that the present invention adopts is: the three-polarized half-slot antenna of capacitive loading step impedance comprises the capacitive loading step impedance antenna 13 of three mutual vertical placements; The capacitive loading step of each single polarization The impedance antenna 13 includes a dielectric substrate 1, a metal ground 2, a radiation slot 3, and a microstrip feeder 4 arranged on the dielectric substrate 1; one side of the dielectric substrate 1 is a metal ground 2, and the other side of the dielectric substrate 1 is a microstrip feeder 4 conduction band 5; there is a radiation slot 3 on the metal ground 2, the shape of the radiation slot 3 is a rectangle, and the radiation slot 3 is located at the center of the metal ground 2; one end of the radiation slot 3 is short-circuited, and the other end 6 is open; in the radiation The sl...

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Abstract

The invention discloses a capacitor-loaded stepped impedance type tri-polarization half-slot antenna, and relates to a slot antenna. The antenna comprises three perpendicularly-placed single-polarized antennas (13), wherein each antenna (13) comprises a dielectric substrate (1), and a metal ground (2) and a radiation slot slit (3) on the dielectric substrate (1), and a microstrip feeder line (4); the radiation slot slit (3) is formed in the metal ground (2); one end of the radiation slot slit (3) is in short circuit while the other end (6) of the radiation slot slit is in open circuit; a low resistance slot slit (8), which is formed by multiple parallel capacitors (7) that are bridged on the edge of the radiation slot slit (3), is formed in the part, close to the open circuit end, of the radiation slot slit (3); a high resistance slot slit (9) is formed in the rest part of the radiation slot slit (3); and an antenna port (10) is formed in one end of the microstrip feeder line (4) while the other end of the microstrip feeder line (4) is in open circuit, and crosses over the high resistance slot slit (9) and extends for a certain length. The antenna is in multi-band operation, so that the antenna dimensions, and the conditions of crossed polarization and shielding can be reduced, and isolation among ports can be improved.

Description

technical field [0001] The invention relates to a slot antenna, in particular to a three-polarized half-slot antenna with capacitor-loaded step impedance. 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. Multi-polarization MIMO can effectively improve spectrum efficiency and channel capacity. In order to apply MIMO technology to small terminals, antennas with different polarizations need to be co-located. A large metal ground will have a shielding effect on the radiation of the antenna, making the slot antenna unsuitable for co-located multiple-input...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q13/10H01Q5/10H01Q5/314H01Q1/48H01Q1/52
CPCH01Q13/106H01Q1/48H01Q1/521H01Q5/10H01Q5/314
Inventor 殷晓星陈翘赵洪新
Owner SOUTHEAST UNIV
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