Slot antenna of gate slot ground coplanar waveguide feed capacitance loading stepped-impedance
A technology of step impedance and waveguide feeding, which is applied in the direction of slot antennas, antennas, antenna grounding devices, etc., can solve problems such as large slot impedance, poor cross-polarization of antennas, decline in spectral efficiency and channel capacity, and achieve Effects of miniaturization, electrical size reduction, and cross-polarization suppression
Inactive Publication Date: 2016-08-24
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
[0015] The present invention will be further described below in conjunction with drawings and embodiments.
[0016] The embodiment adopted by the present invention is: the slot antenna of the coplanar waveguide fed by the grating ground coplanar waveguide and the step impedance is loaded with a step impedance, including a dielectric substrate 1, a metal ground 2 and a radiation slot 3 arranged on the dielectric substrate 1, and a coplanar waveguide The feeder 4; one side of the dielectric substrate 1 is the metal ground 2 and the coplanar waveguide feeder 4, and the ground plane 5 of the coplanar waveguide feeder 4 is 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, the radiation slot 3 is located in the center of the metal ground 2; the grid slit 6 array formed by a plurality of parallel grid slits 6 on the metal ground 2, the shape of the grid slit 6 is rectangular, the grid slit is located around the...
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A slot antenna of gate slot ground coplanar waveguide feed capacitance loading stepped-impedance relates to a slot antenna, and comprises a dielectric substrate (1), a metal ground and a radiation slot (3) which are arranged on the dielectric substrate (1), and a coplanar waveguide feeder line (4). The radiation slot (3) and a plurality of parallel gate slots (6) are arranged on the metal ground (2), and the two ends of the radiation slot (3) are in short circuit. A plurality of capacitors (7) at the middle part of the radiation slot (3) is in parallel bridge connection with the edges of the radiation slot (3) to form a low-resistance slot (8), and the rest part of the radiation slot (3) is a high-resistance slot (9). A conductor (5) outside the coplanar waveguide feeder line (4) is connected with the metal ground (2), and a conductor (12) at the tail end of the coplanar waveguide feeder line (4) spans the high-resistance slot (9) and is connected with the metal ground (2) at the edge (11) of the high-resistance slot (9). The antenna is in multi-frequency band work, enables the size and the shelter to be reduced and the isolation to be improved, and restrains the cross polarization.
Description
technical field [0001] The invention relates to a slot antenna, in particular to a slot antenna with step impedance loaded by a coplanar waveguide feeding 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. 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 d...
Claims
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IPC IPC(8): H01Q1/38H01Q1/48H01Q1/50H01Q5/10H01Q5/307H01Q5/321H01Q13/10
CPCH01Q1/38H01Q1/48H01Q1/50H01Q5/10H01Q5/307H01Q5/321H01Q13/10
Inventor 殷晓星周健赵洪新
Owner SOUTHEAST UNIV