Gate slot ground coaxial feed low-resistance side wall phase-step impedance type slot-slit antenna
A step impedance and coaxial feeding technology, applied in slot antennas, antennas, antenna grounding devices, etc., can solve problems such as large slot impedance, antenna cross-polarization deterioration, spectral efficiency and channel capacity decline, and achieve Realization of miniaturization, reduction in electrical size, and suppression of cross-polarization effects
Inactive Publication Date: 2016-07-27
SOUTHEAST UNIV
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- Application Information
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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 by the present invention is: the slot antenna of the coaxial feeding low-resistance side wall step impedance of the grid slot includes a dielectric substrate 1, a metal ground 2 and a radiation slot 3 arranged on the dielectric substrate 1, a coaxial The feeder 4; one side of the dielectric substrate 1 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 a rectangle, and the radiation slot The slot 3 is located in the center of the metal ground 2; the grid slot 6 formed by a plurality of parallel grid slots 6 on the metal ground 2, the shape of the grid slot 6 is a rectangle, and the grid slot is located around the radiation slot 3, and the grid slot 6 and the radiation slot 3 are perpendicular ...
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The invention discloses a gate slot ground coaxial feed low-resistance side wall phase-step impedance type slot-slit antenna, and relates to a slot antenna. The antenna comprises a dielectric substrate (1), and a metal ground (2) and a radiation slot slit (3) on the dielectric substrate (1), and a coaxial feeder line (4); the radiation slot slit (3) and multiple parallel gate slits (6) are formed on the metal ground (2); the two ends of the radiation slot slit (3) are in short circuit; a low resistance slot slit (8) which is formed by two metalized side walls (7) is arranged in the middle part of the radiation slot slit (3); a high resistance slot slit (9) is formed in the rest part of the radiation slot slit (3); an outer conductor (5) of the coaxial feeder line (4) is connected with the metal ground (2); and an inner conductor (12) at the tail end of the coaxial feeder line (4) crosses over the high resistance slot slit (9), and is connected with the metal ground (2) on the edge (11) of the high resistance slot slit (9). The antenna is in multi-band operation, so that the antenna dimensions, and the conditions of crossed polarization and shielding can be reduced, and the isolation among ports can be improved.
Description
technical field [0001] The invention relates to a slot antenna, in particular to a slot antenna with coaxial feeding of grid slots 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 it difficul...
Claims
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Patent Timeline
Login to View More IPC IPC(8): H01Q1/38H01Q1/48H01Q13/10H01Q5/10
CPCH01Q1/38H01Q1/48H01Q5/10H01Q13/10
Inventor 史俊殷晓星赵洪新
Owner SOUTHEAST UNIV