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Dual-band capacitor loading stepped-impedance slot antenna

A step impedance, capacitive loading technology, applied in slot antennas, antennas, and devices that make antennas work in different bands at the same time, which can solve the problem of large slot impedance, antenna cross-polarization deterioration, spectral efficiency and channel capacity decline. and other problems, to achieve the effect of miniaturization, suppression of cross-polarization, and reduction of electrical size

Inactive Publication Date: 2016-08-10
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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  • Dual-band capacitor loading stepped-impedance slot antenna

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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 slot antenna of dual-frequency capacitive loading step impedance comprises a dielectric substrate 1, a metal ground 2 arranged on the dielectric substrate 1, a radiation slot 3, and a microstrip feeder 4; One side is the metal ground 2, and the other side of the dielectric substrate 1 is the conduction band 5 of the microstrip feeder 4; 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 at the edge of the metal ground 2. The center; the two ends 6 of the radiation slot 3 are short-circuited; in the middle part of the radiation slot 3, several capacitors 7 are connected in parallel across the two edges of the radiation slot 3, so that the characteristic impedance of the middle part of the radiation slot 3 becomes low, A...

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Abstract

Dual -frequency electrical capacity loaded steering -oriented groove antenna involves a gap antenna, which includes the medium substrate (1), the metal land (2) on the medium substrate (1), and the radiation slot (3), the micro -band feed line (4); there is a radiation slot seam (3) on the metal field (2); the two ends of the radiation slot (3) (6) short circuit; in the middle of the radiation slot (3), there are several capacitors (7) in parallel to the radiationSlot joint (3) The edge of low -resistance grooves (8); radiation grooves (3) the rest are high -resistance grooves (9), micro -band feed line (4) one end is antenna port (10), micro -band feed line (4) The other end opens through the high -resistance slot (9) on the edge (11) to connect to the metal land (2) through a short -circuit needle (12).The antenna is a multi -frequency band work, which can reduce the size of the antenna, cross polarization, cover and improve isolation.

Description

technical field [0001] The invention relates to a slot antenna, in particular to a slot antenna with dual-frequency capacitive loading 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. 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 impedance ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q13/10H01Q1/38H01Q5/10H01Q5/335H01Q5/328
CPCH01Q13/10H01Q1/38H01Q5/10H01Q5/328H01Q5/335
Inventor 刘蕾蕾李品炎
Owner NANJING UNIV OF POSTS & TELECOMM
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