Gate slot ground coplanar waveguide feed low resistance sidewall stepped-impedance semi-slot antenna
A step impedance, waveguide feeding technology, applied in slot antennas, antennas, and devices that make antennas work in different bands at the same time, can solve the problem of large slot impedance, antenna cross-polarization deterioration, spectral efficiency and channel capacity. to achieve the effects of miniaturization, reduction in electrical size, and suppression of cross-polarization
Inactive Publication Date: 2016-08-10
SOUTHEAST UNIV
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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 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
[0014] The present invention will be further described below in conjunction with drawings and embodiments.
[0015] The embodiment adopted in the present invention is: a half-slot antenna with coplanar waveguide fed by grid slots with low-resistance sidewall step impedance includes a dielectric substrate 1, a metal ground 2 and a radiation slot 3 arranged on the dielectric substrate 1, a common Surface waveguide feeder 4; one side of the dielectric substrate 1 is the metal ground 2 and the coplanar waveguide feeder 4, the ground plane 5 of the coplanar waveguide feeder 4 is the metal ground 2; the metal ground 2 has a radiation slot 3, and the radiation slot 3 The shape is rectangular, and the radiation slot 3 is located in the center of the metal ground 2; the grid slit 6 formed by a plurality of parallel grid slits 6 on the metal ground 2 is rectangular in shape, and the grid slit is located around the radiation slot 3. Slot 6 and radiation slot 3 are perpendicular to each o...
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The invention relates to a slot antenna and particularly relates to a gate slot ground coplanar waveguide feed low resistance sidewall stepped-impedance semi-slot antenna. The semi-slot antenna comprises a medium substrate (1), and a metal ground (2) and a radiation slot (3) which are on the medium substrate (1), and a coplanar waveguide feeder (4), wherein the radiation slot (3) and multiple parallel gate slots (6) are on the metal ground (2), one end of the radiation slot (3) is in short circuit, the other end of the radiation slot (3) is in open circuit, the portion of the radiation slot (3) close to the open circuit end is provided with two metalized side walls (7) which form a low-resistance slot (8), the other portion of the radiation slot (3) is a high-resistance slot (9), an outer conductor (5) of the coplanar waveguide feeder (4) is connected with the metal ground (2), and an inner conductor (12) at the tail end of the coplanar waveguide feeder (4) crosses the high-resistance slot (9) and is connected with the metal ground (2) at an edge (11). The tri-polarized semi-slot antenna realizes multiband operation, can reduce the antenna dimension, cross polarization and shielding and improves isolation.
Description
technical field [0001] The invention relates to a slot antenna, in particular to a half-slot antenna with coplanar waveguide fed by 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. 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 ...
Claims
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IPC IPC(8): H01Q13/10H01Q1/38H01Q5/10H01Q5/335H01Q5/328
CPCH01Q13/10H01Q1/38H01Q5/10H01Q5/328H01Q5/335
Inventor 陈翘殷晓星赵洪新
Owner SOUTHEAST UNIV