Microstrip feed capacitor-loading semi-slot antenna

A capacitive loading, half-slot antenna technology, applied in the direction of slot antenna, antenna grounding device, antenna grounding switch structure connection, etc., can solve the problems of large slot impedance, antenna cross-polarization deterioration, spectral efficiency and channel capacity decline, etc. , to achieve the effect of miniaturization, suppression of cross polarization, and reduction of electrical size

Inactive Publication Date: 2016-08-24
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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  • Microstrip feed capacitor-loading semi-slot antenna

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Embodiment Construction

[0010] The present invention will be further described below in conjunction with drawings and embodiments.

[0011] The embodiment that the present invention adopts is: the half-slot antenna that the microstrip feeding capacitive loading 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 of the dielectric substrate 1 It 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 a rectangle, and the radiation slot 3 is located in the center of the metal ground 2 ; One end of the radiation slot 3 is short-circuited, and the other end 6 is open circuit; the part 8 intersecting with the microstrip feeder 4 is removed in the radiation slot 3, and several capacitors 7 are connected in parallel across the two edges of the radiation s...

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PUM

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Abstract

A microstrip feed capacitor-loading semi-slot antenna relates to a slot antenna, and comprises a dielectric substrate (1), a metal ground (2) and a radiation slot (3) which are arranged on the dielectric substrate (1), and a microstrip feeder line (4). The radiation slot (3) is arranged on the metal ground (2), one end of the radiation slot (3) is in short circuit, and the other end is in open circuit. A plurality of capacitors (7) at the rest part of the radiation slot (3), except the part intersected with the microstrip feeder line (4) of the radiation slot (3), is in parallel bridge connection with the edges of the radiation slot (3), one end of the microstrip feeder line (4) is an antenna port, and the other end spans the radiation slot (3) and is connected with the metal ground (2) at an edge (11) via a short circuit pin (12). The antenna enables the size and the cross polarization to be reduced.

Description

technical field [0001] The invention relates to a slot antenna, in particular to a half-slot antenna loaded with microstrip feeding capacitance. 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 of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/38H01Q1/48H01Q1/50H01Q13/10
CPCH01Q1/38H01Q1/48H01Q1/50H01Q13/10
Inventor 刘蕾蕾吴振华
Owner NANJING UNIV OF POSTS & TELECOMM
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