Three-polarization semi-slot antenna with dual-frequency metal via hole step impedance
A technology of step impedance and metal vias, which is applied in the directions of antennas, slot antennas, antenna grounding devices, etc., can solve the difficulty of impedance matching of slot antenna feeding transmission lines, the decline of spectral efficiency and channel capacity, and the deterioration of antenna cross polarization and other issues, to achieve the effect of improving the isolation between ports, realizing miniaturization, and reducing the electrical size
Inactive Publication Date: 2016-08-24
NANJING UNIV OF POSTS & TELECOMM
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- Description
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- Application Information
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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 adopted in the present invention is: the three-polarized half-slot antenna of the dual-frequency metal via step impedance includes three mutually vertically placed single-polarized metal via step impedance antennas 13; each single-polarized metal via step impedance The antenna 13 includes a dielectric substrate 1, a metal ground 2, a radiation slot 3, and a microstrip feeder 4 arranged on the dielectric substrate 1; one side of the dielectric substrate 1 is the metal ground 2, and the other side of the dielectric substrate 1 is the microstrip feeder 4. conduction band 5; there is a radiation slot 3 on the metal ground 2, the shape of the radiation slot 3 is rectangular, and the radiation slot 3 is located at the center of the metal ground 2; one end of the radiation slot 3 is short-circuited, and the other end 6 is open; in the radiation slot The p...
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The invention discloses a three-polarization semi-slot antenna with dual-frequency metal via hole step impedance, which relates to a slot antenna. The antenna is composed of three single-polarization antennas (13) placed vertically mutually. Each antenna (13) comprises a dielectric substrate (1), a metal ground (2) and a radiation slot (3) on the dielectric substrate (1) and a microstrip feeder (4), wherein the metal ground (2) is provided with the radiation slot (3); one end of the radiation slot (3) is short-circuited and the other end (6) is open-circuited; the part, close to the open-circuited end, of the radiation slot (3) is provided with an array of two rows of metal via holes (7) to form a low-impedance slot (8); the rest part of the radiation slot (3) is a high-impedance slot (9); and one end of the microstrip feeder (4) is an antenna port (10) and the other end of the microstrip feeder (4) is open-circuited, passes across the high-impedance slot (9) to be connected with the metal ground (2) at the edge (11) through a short circuit pin (12). The antenna works under multiple frequency bands, the antenna size, the cross polarization and the shielding can be reduced, and isolation is improved.
Description
technical field [0001] The invention relates to a slot antenna, in particular to a triple-polarized half-slot antenna with dual-frequency metal via hole 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 unsuitable for co-located ...
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 刘蕾蕾陈俊驰
Owner NANJING UNIV OF POSTS & TELECOMM