CN105720375A - Grid slot ground coaxial feed capacitor-loaded tripolar slot antenna - Google Patents
Grid slot ground coaxial feed capacitor-loaded tripolar slot antenna Download PDFInfo
- Publication number
- CN105720375A CN105720375A CN201610218957.2A CN201610218957A CN105720375A CN 105720375 A CN105720375 A CN 105720375A CN 201610218957 A CN201610218957 A CN 201610218957A CN 105720375 A CN105720375 A CN 105720375A
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- Prior art keywords
- rabbet joint
- antenna
- line
- ground
- radiation
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/10—Resonant slot antennas
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
Abstract
The invention discloses a grid slot ground coaxial feed capacitor-loaded tripolar slot antenna, and relates to a slot antenna. The antenna consists of three single-polar antennas (11) which are arranged vertical to one another; each antenna (11) comprises a dielectric substrate (1), a metal ground (2) and a radiating slot (3) on the dielectric substrate (1), and a coaxial feeder (4); the radiating slot (3) and a plurality of parallel grid slots (6) are arranged on the metal ground (2); two ends of the radiating slot (3) are short-circuited; a plurality of capacitors (7) on the radiating slot (3) are connected to the edge of the radiating slot (3) in a crossing manner in parallel; a port (8) of the antenna is formed in one end of the coaxial feeder (4), and an inner conductor (9) at the other end of the coaxial feeder (4) crosses over the radiating slot (3) and is connected with the metal ground (2) at the edge (10) of the radiating slot (3). According to the antenna, the antenna dimensions can be reduced, cross polarization and shielding are reduced, and isolation is improved.
Description
Technical field
The present invention relates to a kind of slot antenna, three polarization slot antennas of especially a kind of grid seam ground coaxial feed capacitive load.
Background technology
Slot antenna is the antithesis antenna of element antenna, has a wide range of applications.But, common slot antenna not only radiates the length of the line of rabbet joint itself 1/2nd wavelength, and radiate and also need to bigger Metal ground around the line of rabbet joint and amass, big 1/2nd wavelength of length of the length ratio line of rabbet joint on usual metal ground, big 1/2nd wavelength of width of the width ratio line of rabbet joint on metal ground.Multipolarization MIMO can effectively improve spectrum efficiency and channel capacity, in order to MIMO technology may apply to the terminal that volume is little, it is necessary to the not like-polarized co-located placement of antenna.The radiation of antenna can be produced occlusion effect by bigger metal ground, slot antenna is made to be not suitable for co-located multiple-input and multiple-output (MIMO) application, when using in particular as multi-polarization antenna, the isolation caused between the cross polarization variation of antenna, antenna port is deteriorated by big metal ground, and these all will cause the decline of spectrum efficiency and channel capacity.The impedance of the line of rabbet joint is very big simultaneously, and the impedance matching also making slot antenna feeding transmission line is relatively difficult.
Summary of the invention
Technical problem: with the purpose of the present invention is to propose to a kind of grid seam three polarization slot antennas of coaxial feed capacitive load, this antenna can reduce the length radiating the line of rabbet joint and the area on metal ground, and has the effect suppressing cross polarization, improvement isolation, reduction to block.
Technical scheme: three polarization slot antennas of the grid seam ground coaxial feed capacitive load of the present invention include the grid seam ground capacitive load antenna of three single polarizations being mutually perpendicular to placement；The grid seam ground capacitive load antenna of each single polarization includes medium substrate, the metal that is arranged on medium substrate and the radiation line of rabbet joint, coaxial feeder；The one side of medium substrate is metal ground, is affixed the outer conductor of coaxial feeder and metal and is connected；Metal has the radiation line of rabbet joint on the ground, and the shape of the radiation line of rabbet joint is rectangle, and the radiation line of rabbet joint is positioned at the center on metal ground；The metal grid slot array that a plurality of parallel gate seam is constituted on the ground, the shape of grid seam is rectangle, and grid seam is positioned at the surrounding of the radiation line of rabbet joint, and grid seam is mutually perpendicular to the radiation line of rabbet joint；The short at one end of grid seam；The other end open circuit of grid seam, is positioned at the edge of medium substrate；Two terminal shortcircuits of the radiation line of rabbet joint；Several Capacitance parallel connection is had to be connected across two edges of the radiation line of rabbet joint so that the characteristic impedance step-down of the radiation line of rabbet joint；One end of coaxial feeder is the port of antenna, and the inner wire of the coaxial feeder other end strides across the radiation line of rabbet joint, radiation the line of rabbet joint edge, with metal be connected.
Change the spacing of adjacent gate seam in grid slot array, the width of grid seam, grid seam short-circuit end from the distance of the radiation line of rabbet joint, thus it is possible to vary the electrical length of the operating frequency of antenna, the width of working band and the radiation line of rabbet joint.
Change the quantity of loading capacitance, capacitance and spacing, it is possible to regulate the characteristic impedance of the radiation line of rabbet joint, thus it is possible to vary the electrical length of the operating frequency of antenna, the width of working band and the radiation line of rabbet joint.
The electrical length of grid seam should not be taken at 1/4th, to avoid causing resonance radiation, causes cross-polarized rising.
Capacitance parallel connection is loaded into two edges of the radiation line of rabbet joint, the characteristic impedance not only making line of rabbet joint transmission line is reduced to and is prone to and feeding transmission lines matching volume, but also reducing the phase velocity of line of rabbet joint transmission line so that the length of the half-wavelength radiation line of rabbet joint reduces, it is achieved the miniaturization of the radiation line of rabbet joint and then antenna.The operating frequency of three polarization slot antennas of grid seam ground coaxial feed capacitive load is mainly determined by the resonant frequency of the radiation line of rabbet joint, but the operating frequency of antenna and matching degree can also be adjusted by the position that the size on metal ground, coaxial feeder inner wire are connected with the radiation line of rabbet joint.The radiation line of rabbet joint is formed periodic loading by metal grid seam on the ground, makes again the radiation line of rabbet joint become periodic slow-wave structure, reduces the electric size of antenna；Simultaneously because the direction of grid seam is vertical with the direction of the radiation line of rabbet joint, inhibit metal on the ground along the electric current in radiation line of rabbet joint direction, and make the more concentration along the remaining CURRENT DISTRIBUTION radiating line of rabbet joint direction, thus reducing cross-polarized radiation, improve the isolation between antenna port, also reduce the size on metal ground, reduce the occlusion effect on metal ground.
Beneficial effect: three polarization slot antennas of the grid seam ground coaxial feed capacitive load of the present invention provide the benefit that, this antenna can reduce the electric size of whole antenna, realize miniaturization, also there is the cross polarization of suppression antenna simultaneously, improve and isolate between port, and reduce the effect blocked on metal ground.
Accompanying drawing explanation
Fig. 1 is three polarization slot antenna overall structure schematic diagrams of grid seam ground coaxial feed capacitive load.
Fig. 2 be grid seam ground coaxial feed capacitive load three polarization slot antennas in single polarization grid seam ground capacitive load antenna structural representation.
Figure has: medium substrate 1, metal ground 2, the radiation line of rabbet joint 3, coaxial feeder 4, outer conductor 5, grid seam 6, electric capacity 7, port 8, inner wire 9, the grid seam ground capacitive load antenna 11 of edge 10 and single polarization.
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described.
Embodiment of the present invention is: three polarization slot antennas of grid seam ground coaxial feed capacitive load include the grid seam ground capacitive load antenna 11 of three single polarizations being mutually perpendicular to placement；The grid seam ground capacitive load antenna 11 of each single polarization includes medium substrate 1, the metal that is arranged on medium substrate 1 ground 2 and the radiation line of rabbet joint 3, coaxial feeder 4；The one side of medium substrate 1 is metal ground 2, and the outer conductor 5 of coaxial feeder 4 is affixed with metal ground 2 and is connected；Having the radiation line of rabbet joint 3 on metal ground 2, the shape of the radiation line of rabbet joint 3 is rectangle, and the radiation line of rabbet joint 3 is positioned at the center on metal ground 2；On metal ground 2, the grid of a plurality of parallel gate seam 6 composition stitch 6 arrays, and the shape of grid seam 6 is rectangle, and grid seam is positioned at the surrounding of the radiation line of rabbet joint 3, and grid seam 6 is mutually perpendicular to the radiation line of rabbet joint 3；The short at one end of grid seam 6；The other end open circuit of grid seam 6, is positioned at the edge of medium substrate 1；Two terminal shortcircuits of the radiation line of rabbet joint 3；Several electric capacity 7 is had to be connected in parallel across two edges of the radiation line of rabbet joint 3 so that the characteristic impedance step-down of the radiation line of rabbet joint 3；One end of coaxial feeder 4 is the port 8 of antenna, and the inner wire 9 of coaxial feeder 4 other end strides across the radiation line of rabbet joint 3, at the edge 10 of the radiation line of rabbet joint 3, is connected with metal ground 2.
Change that grid stitch the spacing of the seam of adjacent gate in 6 arrays 6, the width of grid seam 6, grid stitch 6 short-circuit ends distance from the radiation line of rabbet joint 3, thus it is possible to vary the electrical length of the operating frequency of antenna, the width of working band and the radiation line of rabbet joint 3.
Change the quantity of loading capacitance 7, capacitance and spacing, it is possible to regulate the characteristic impedance of the radiation line of rabbet joint 3, thus it is possible to vary the electrical length of the operating frequency of antenna, the width of working band and the radiation line of rabbet joint 3.
The electrical length of grid seam 6 should not be taken at 1/4th, to avoid causing resonance radiation, causes cross-polarized rising.
The operating frequency of three polarization slot antennas of grid seam ground coaxial feed capacitive load is mainly determined by the resonant frequency of the radiation line of rabbet joint 3, but the operating frequency of antenna and matching degree can also be adjusted by the position that the size on metal ground 2, coaxial feeder inner wire 9 are connected with the radiation line of rabbet joint 3.The radiation line of rabbet joint 3 is formed periodic loading by the grid seam 6 on metal ground 2, makes again the radiation line of rabbet joint 3 become periodic slow-wave structure, reduces the electric size of antenna；Simultaneously because the direction of grid seam 6 is vertical with the direction of the radiation line of rabbet joint 3, inhibit the electric current along the radiation line of rabbet joint 3 direction on metal ground 2, and make the more concentration along the remaining CURRENT DISTRIBUTION radiating the line of rabbet joint 3 direction, thus reducing cross-polarized radiation, improve the isolation between antenna port, also reduce the size on metal ground 2, reduce the occlusion effect on metal ground 2.
In technique, three polarization slot antennas of grid seam ground coaxial feed capacitive load both can adopt common printed circuit board (PCB) (PCB) technique, it would however also be possible to employ the integrated circuit technologies such as LTCC (LTCC) technique or CMOS, Si substrate realize.Electric capacity 7 can select the patch capacitor 7 of corresponding encapsulation the distance according to electric capacity 7 two pins electrode, the width of the selective radiation line of rabbet joint 3 according to operating frequency.On manufacturing, the grid of three single polarizations seam ground capacitive load antenna 13 can be mutually perpendicular to by draw-in groove and be installed together, or is mutually perpendicular to by binding agent and is bonded together, or two kinds of methods use together.
In accordance with the above, the present invention can just be realized.
Claims (3)
1. three polarization slot antennas of a grid seam ground coaxial feed capacitive load, it is characterised in that this antenna includes grid seam ground capacitive load antenna (11) of three single polarizations being mutually perpendicular to placement；Grid seam ground capacitive load antenna (11) of each single polarization include medium substrate (1), the metal that is arranged on medium substrate (1) ground (2) and radiate the line of rabbet joint (3), coaxial feeder (4)；The one side of medium substrate (1) is metal ground (2), and the outer conductor (5) of coaxial feeder (4) is affixed with metal ground (2) and is connected；Having the radiation line of rabbet joint (3) on metal ground (2), the shape of the radiation line of rabbet joint (3) is rectangle, the center of the radiation line of rabbet joint (3) with being positioned at metal (2)；Grid seam (6) array that upper a plurality of parallel gate seam (6) of metal ground (2) is constituted, the shape of grid seam (6) is rectangle, grid seam is positioned at the surrounding of the radiation line of rabbet joint (3), and grid seam (6) are mutually perpendicular to the radiation line of rabbet joint (3)；The short at one end of grid seam (6)；The other end open circuit of grid seam (6), is positioned at the edge of medium substrate (1)；Two terminal shortcircuits of the radiation line of rabbet joint (3)；Several electric capacity (7) is had to be connected in parallel across two edges of the radiation line of rabbet joint (3) so that the characteristic impedance step-down of the radiation line of rabbet joint (3)；One end of coaxial feeder (4) is the port (8) of antenna, the inner wire (9) of coaxial feeder (4) other end strides across the radiation line of rabbet joint (3), radiation the line of rabbet joint (3) edge (10), with metal (2) be connected.
2. three polarization slot antennas of a kind of grid according to claim 1 seam ground coaxial feed capacitive load, it is characterized in that change grid seam (6) array in adjacent gate seam the spacing of (6), grid seam the width of (6), grid seam (6) short-circuit end from radiation the line of rabbet joint (3) distance, thus it is possible to vary the operating frequency of antenna, working band width and radiation the line of rabbet joint (3) electrical length.
3. three polarization slot antennas of a kind of grid according to claim 1 seam ground coaxial feed capacitive load, it is characterized in that changing the quantity of loading capacitance (7), capacitance and spacing, can regulate radiation the line of rabbet joint (3) characteristic impedance, thus it is possible to vary the operating frequency of antenna, working band width and radiation the line of rabbet joint (3) electrical length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610218957.2A CN105720375A (en) | 2016-04-08 | 2016-04-08 | Grid slot ground coaxial feed capacitor-loaded tripolar slot antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610218957.2A CN105720375A (en) | 2016-04-08 | 2016-04-08 | Grid slot ground coaxial feed capacitor-loaded tripolar slot antenna |
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| CN105720375A true CN105720375A (en) | 2016-06-29 |
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| CN201610218957.2A Pending CN105720375A (en) | 2016-04-08 | 2016-04-08 | Grid slot ground coaxial feed capacitor-loaded tripolar slot antenna |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7123200B1 (en) * | 1990-05-02 | 2006-10-17 | Nortel Networks Limited | Sea surface antenna |
| CN101032002A (en) * | 2004-09-30 | 2007-09-05 | 东京毅力科创株式会社 | Plasma processing system for treating a substrate |
| CN104124527A (en) * | 2014-07-22 | 2014-10-29 | 南京邮电大学 | High-isolation slot antenna array |
-
2016
- 2016-04-08 CN CN201610218957.2A patent/CN105720375A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7123200B1 (en) * | 1990-05-02 | 2006-10-17 | Nortel Networks Limited | Sea surface antenna |
| CN101032002A (en) * | 2004-09-30 | 2007-09-05 | 东京毅力科创株式会社 | Plasma processing system for treating a substrate |
| CN104124527A (en) * | 2014-07-22 | 2014-10-29 | 南京邮电大学 | High-isolation slot antenna array |
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Application publication date: 20160629 |
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