Grid slot ground coaxial feed capacitor-loaded tripolar slot antenna
A technology of capacitive loading and coaxial feeding, which is applied to slot antennas, antenna coupling, circuits, etc., can solve problems such as difficulty in impedance matching of slot antenna feeding transmission lines, decline in spectral efficiency and channel capacity, and poor isolation of antenna ports. , to achieve miniaturization, improve isolation, and reduce electrical size
Inactive Publication Date: 2016-06-29
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
[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 three-polarized slot antenna of the coaxial feeding capacitive loading of grid slot comprises the capacitance-loaded antenna 11 of the single-polarized grid slot of three mutual perpendicular placements; The capacitance-loaded antenna 11 of the grid slot includes a dielectric substrate 1, a metal ground 2 arranged on the dielectric substrate 1, a radiation slot 3, and a coaxial feeder 4; one side of the dielectric substrate 1 is a metal ground 2, and the outer conductor of the coaxial feeder 4 5 is connected to the metal ground 2; there is a radiation slot 3 on the metal ground 2, 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; the metal ground 2 is composed of multiple parallel grid slots 6 The grid slit 6 array, the shape of the gr...
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The three-polarized slot antenna with coaxial feed capacitive loading of grid slot relates to a slot antenna, which is composed of three mutually perpendicularly placed single-polarized antennas (11); each antenna (11) includes a dielectric substrate ( 1), metal ground (2) and radiation slots (3), coaxial feeder (4) on the dielectric substrate (1); there are radiation slots (3) and multiple parallel grid slots on the metal ground (2) (6); The two ends of the radiation slot (3) are short-circuited; there are several capacitors (7) connected in parallel across the edge of the radiation slot (3); one end of the coaxial feeder (4) is the port (8) of the antenna , the inner conductor (9) at the other end of the coaxial feeder (4) crosses the radiation slot (3), and is connected to the metal ground (2) at the edge (10) of the radiation slot (3). The antenna reduces antenna size, cross polarization, shadowing and improves isolation.
Description
technical field [0001] The invention relates to a slot antenna, in particular to a three-polarization slot antenna loaded with coaxial feed capacitance of a grid slot. 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 unsuitable for co-located m...
Claims
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Patent Timeline
Login to View More IPC IPC(8): H01Q13/10H01Q1/38H01Q1/52
CPCH01Q13/10H01Q1/38H01Q1/52
Inventor 赵洪新沈浩殷晓星
Owner SOUTHEAST UNIV