Grid seam earth coaxial feed line low resistance sidewall step impedance tri-polarized antenna
A step impedance, coaxial feeding technology, applied in slot antennas, antennas, and devices that make antennas work in different frequency bands at the same time, can solve the difficulty of impedance matching of slot antenna feeding transmission lines, and the reduction of spectral efficiency and channel capacity. , antenna port isolation and other problems, to achieve the effect of miniaturization, improved isolation, and reduced electrical size
Inactive Publication Date: 2016-08-10
SOUTHEAST UNIV
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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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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 the coaxial feeding low-resistance sidewall step impedance of the grid slot includes three metal sidewall step impedances of the single-polarized grid slot placed perpendicularly to each other Antenna 13; the metal sidewall step impedance antenna 13 of each single-polarized grid slot includes a dielectric substrate 1, a metal ground 2 and a radiation slot 3, and a coaxial feeder 4 arranged on the dielectric substrate 1; the dielectric substrate 1 One side 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 at the edge of the metal ground 2. The center; the grid slit 6 formed b...
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The invention provides a grid seam earth coaxial feed line low resistance sidewall step impedance tri-polarized antenna. The antenna is formed by three mono-polar antennas (13) that are mutually perpendicular to each other. Each (13) of the three antennas comprises a medium substrate (1), a metal ground (2) on the medium substrate (1), a radiation slot (3) on the medium substrate (1) and a coaxial feed line (4). The radiation slot seam (3) and a plurality of parallel grid seams (6) are arranged on the metal ground (2). One end of the radiation slot seam (3) is short circuited while the other end (6) is open circuited. A low impedance slot seam (8) is formed by two rows of metal sidewalls (7) near the open circuited end of the radiation slot seam (3). The rest part of the radiation slot (3) is a high impedance slot seam (9). The external conductor (5) of the coaxial feed line (4) is connected to the metal ground (2). The conductor (12) inside the end part crosses over the high impedance slot seam (9) at the edges (11) to get connected with the metal ground (2). The antenna of the invention can work with multiple bands. With a reduced size, the antenna achieves cross polarization. Well blocked, an improved isolation effect can be achieved as well.
Description
technical field [0001] The invention relates to a slot antenna, in particular to a three-polarized half-slot antenna with coaxial feeding of grid slot and low-resistance side wall 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...
Claims
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IPC IPC(8): H01Q13/10H01Q1/38H01Q5/10H01Q5/335H01Q5/328H01Q5/28
CPCH01Q13/10H01Q1/38H01Q5/10H01Q5/28H01Q5/328H01Q5/335
Inventor 齐宏业殷晓星赵洪新
Owner SOUTHEAST UNIV