CN105846062A - Dual-frequency gate slot ground capacitor loading stepped-impedance slot antenna - Google Patents
Dual-frequency gate slot ground capacitor loading stepped-impedance slot antenna Download PDFInfo
- Publication number
- CN105846062A CN105846062A CN201610216537.0A CN201610216537A CN105846062A CN 105846062 A CN105846062 A CN 105846062A CN 201610216537 A CN201610216537 A CN 201610216537A CN 105846062 A CN105846062 A CN 105846062A
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- Prior art keywords
- rabbet joint
- line
- frequency
- antenna
- seam
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- 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
- H01Q1/48—Earthing means; Earth screens; Counterpoises
-
- 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
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/10—Resonant antennas
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- Waveguide Aerials (AREA)
Abstract
The invention relates to a slot antenna and particularly relates to a dual-frequency gate slot ground capacitor loading stepped-impedance slot antenna. The slot antenna comprises a medium substrate (1), and a ground metal (2) and a radiation slot (3) which are on the medium substrate (1), and a microstrip feeder (4), wherein the radiation slot (3) and multiple parallel gate slots (6) are on the ground metal (2), two ends (6) of the radiation slot (3) are in short circuit, the middle portion of the radiation slot (3) has multiple capacitors (7) which are in parallel cross connection with an edge of the radiation slot (3) to form a low resistance slot (8), the other portion of the radiation slot (3) is a high resistance slot (9), one end of the microstrip feeder (4) is an antenna port (10), and the other end of the microstrip feeder (4) is in open circuit, crosses the high resistance slot (9) and is connected with the ground metal (2) at the edge (11) through a short circuit needle (12). The slot antenna realizes multiband operation, can reduce the antenna dimension, cross polarization and shielding and improves isolation.
Description
Technical field
The present invention relates to a kind of slot antenna, the line of rabbet joint of a kind of double frequency grid seam ground capacitive load Stepped Impedance
Antenna.
Background technology
Slot antenna is the antithesis antenna of element antenna, has a wide range of applications.But, common slot antenna
Not only the length of the radiation line of rabbet joint itself to have 1/2nd wavelength, and radiate and also need to bigger gold around the line of rabbet joint
Possession area, length 1/2nd wavelength bigger than the length of the line of rabbet joint on usual metal ground, the width ratio groove on metal ground
Big 1/2nd wavelength of width of seam.Bigger metal ground can make slot antenna be not suitable for multiple-input and multiple-output
(MIMO) application, causes the cross polarization of antenna to be deteriorated, and these all will cause spectrum efficiency and channel capacity
Decline.The impedance of the line of rabbet joint simultaneously is very big, and the impedance matching also making slot antenna feeding transmission line is relatively difficult.
The development of modern communications simultaneously also requires that antenna can regulate respectively with multiband operation and two frequency bands.
Summary of the invention
Technical problem: the purpose of the present invention is to propose to the line of rabbet joint sky of a kind of double frequency grid seam ground capacitive load Stepped Impedance
Line, this antenna has been possible not only to multiple working band, and multiple frequency band can regulate respectively；This antenna is permissible
Reduce length and the area on metal ground of the radiation line of rabbet joint, and there is the cross-polarized effect of suppression.
Technical scheme: the present invention double frequency grid seam ground capacitive load Stepped Impedance slot antenna include medium substrate,
The metal being arranged on medium substrate and radiation the line of rabbet joint, microstrip feed line；The one side of medium substrate is metal ground,
The another side of medium substrate is the conduction band of microstrip feed line；Metal has the radiation line of rabbet joint on the ground, and the shape radiating the line of rabbet joint is
Rectangle, 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, grid
The shape of 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；Grid seam
Short at one end；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；?
Radiation line of rabbet joint mid portion, has several electric capacity to be connected in parallel across radiating two edges of the line of rabbet joint so that the radiation line of rabbet joint
The characteristic impedance step-down of mid portion, forms the low-resistance line of rabbet joint；The remainder of the radiation line of rabbet joint is the high resistant line of rabbet joint, high
The resistance line of rabbet joint constitutes the Stepped Impedance radiation line of rabbet joint together with the low-resistance line of rabbet joint, produces a relatively low low frequency operation frequency of frequency
The high-frequency work frequency band that band is higher with a frequency；Also it is the ground plane of described microstrip feed line metal, micro-strip
One end of feeder line is the port of antenna, and the other end of the conduction band of microstrip feed line strides across the high resistant line of rabbet joint, at the high resistant line of rabbet joint
Edge, be connected by Shorted post and metal.
Change the thickness of medium substrate, pcrmeability and dielectric constant, thus it is possible to vary the high resistant line of rabbet joint and the low-resistance line of rabbet joint
Characteristic impedance, changes the height impedance ratio of the Stepped Impedance radiation line of rabbet joint, and then changes the low frequency operation frequency band of antenna
Operating frequency and the operating frequency of high-frequency work frequency band.
Change the length of the low-resistance line of rabbet joint, low-resistance line of rabbet joint position in the radiation line of rabbet joint, the radiation line of rabbet joint can be regulated
Electrical length, to realize antenna miniaturization in various degree, it is also possible to change the work of the low frequency operation frequency band of antenna
Frequency and the operating frequency of high-frequency work frequency band.
Change the spacing of adjacent gate seam in grid slot array, the width of grid seam, grid seam short-circuit end from the radiation line of rabbet joint away from
From, thus it is possible to vary the operating frequency of antenna, the width of working band and the electrical length of the radiation line of rabbet joint.
Change the quantity of loading capacitance, capacitance and spacing, the characteristic impedance of the low-resistance line of rabbet joint can be regulated, change rank
The height impedance ratio of the impedance that the jumps radiation line of rabbet joint, and then change operating frequency and the high frequency of the low frequency operation frequency band of antenna
The operating frequency of working band.
Change the width of the radiation line of rabbet joint, the low-resistance line of rabbet joint and the characteristic impedance of the high resistant line of rabbet joint can be regulated, change step
The height impedance ratio of the impedance radiation line of rabbet joint, and then change operating frequency and the high frequency work of the low frequency operation frequency band of antenna
Make the operating frequency of frequency band.
The electrical length of grid seam should not be taken at 1/4th, to avoid causing resonance radiation, causes cross-polarized
Rise.
Electric capacity parallel connection is loaded into two edges of the radiation line of rabbet joint, not only makes the characteristic impedance of line of rabbet joint transmission line reduce
To being prone to and feeding transmission lines matching volume, but also reduce the phase velocity of line of rabbet joint transmission line so that half-wavelength radiates
The length of the line of rabbet joint reduces, it is achieved the radiation line of rabbet joint and then the miniaturization of antenna.The capacitive load step resistance of double frequency grid seam ground
The operating frequency of the low frequency operation frequency band of anti-slot antenna and the operating frequency of high-frequency work frequency band are mainly by spoke
The resonant frequency penetrating the line of rabbet joint determines, but the size on metal ground, microstrip feed line conduction band are in the position of the radiation line of rabbet joint also
The operating frequency of antenna and matching degree can be adjusted.Owing to the radiation line of rabbet joint existing low-resistance line of rabbet joint has again height
The resistance line of rabbet joint, constitutes the radiation line of rabbet joint of Stepped Impedance, not only makes antenna miniaturization, reduce cross polarization,
Also reduce the size on metal ground, but also so that antenna has multiple working band, and change low-resistance groove
Stitch the relative length with the high resistant line of rabbet joint and impedance, the position of two working bands can be adjusted respectively.Metal is on the ground
Grid seam radius slit become periodically load, make again to radiate the line of rabbet joint and become periodic slow-wave structure,
Further reduce the electric size of antenna；Simultaneously because the direction of grid seam is vertical with the direction of the radiation line of rabbet joint, suppression
Metal is on the ground along the electric current in radiation line of rabbet joint direction, and makes the remaining CURRENT DISTRIBUTION along radiation line of rabbet joint direction
More concentration, thus reduce cross-polarized radiation, also reduce the size on metal ground.
Beneficial effect: the slot antenna of the double frequency grid seam ground capacitive load Stepped Impedance of the present invention provides the benefit that,
This antenna can reduce the electric size of whole antenna, realize miniaturization, and this antenna has been possible not only to multiple frequency simultaneously
Band, and multiple frequency band can regulate respectively, also has the cross-polarized effect of suppression antenna.
Accompanying drawing explanation
Fig. 1 is the slot antenna overall structure schematic diagram of double frequency grid seam ground capacitive load Stepped Impedance.
Figure has: medium substrate 1, metal ground 2, radiation the line of rabbet joint 3, microstrip feed line 4, conduction band 5, grid seam 6,
Electric capacity 7, the low-resistance line of rabbet joint 8, the high resistant line of rabbet joint 9, port 10, edge 11 and Shorted post 12.
Detailed description of the invention
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
Embodiment of the present invention is: the slot antenna of double frequency grid seam ground capacitive load Stepped Impedance includes
Medium substrate 1, the metal being arranged on medium substrate 1 ground 2 and the radiation line of rabbet joint 3, microstrip feed line 4；Medium
The one side of substrate 1 is metal ground 2, and the another side of medium substrate 1 is the conduction band 5 of microstrip feed line 4；Metal ground
Having the radiation line of rabbet joint 3 on 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, grid seam 6 is mutually perpendicular to the radiation line of rabbet joint 3；The short at one end of grid seam 6；Grid seam 6
The other end open circuit, be positioned at the edge of medium substrate 1；Two terminal shortcircuits of the radiation line of rabbet joint 3；At the radiation line of rabbet joint 3
Mid portion, has several electric capacity 7 to be connected in parallel across radiating two edges of the line of rabbet joint 3 so that the radiation line of rabbet joint 3
The characteristic impedance step-down of mid portion, forms the low-resistance line of rabbet joint 8；The remainder of the radiation line of rabbet joint 7 is the high resistant line of rabbet joint
9, the high resistant line of rabbet joint 9 constitutes the Stepped Impedance radiation line of rabbet joint 3 together with the low-resistance line of rabbet joint 8, produces a frequency relatively low
Low frequency operation frequency band and the higher high-frequency work frequency band of a frequency；Metal ground 2 is also described microstrip feed line
The ground plane of 4, one end of microstrip feed line 4 is the port 10 of antenna, the other end of the conduction band 5 of microstrip feed line 4
Stride across the high resistant line of rabbet joint 9, at the edge 11 of the high resistant line of rabbet joint 9, be connected with metal ground 2 by Shorted post 12.
Change the thickness of medium substrate 1, pcrmeability and dielectric constant, thus it is possible to vary the high resistant line of rabbet joint 9 and low-resistance groove
The characteristic impedance of seam 8, changes the height impedance ratio of the Stepped Impedance radiation line of rabbet joint 3, and then changes the low frequency of antenna
The operating frequency of working band and the operating frequency of high-frequency work frequency band.
Change the length of the low-resistance line of rabbet joint 8, the low-resistance line of rabbet joint 8 position in the radiation line of rabbet joint 3, radiation can be regulated
The electrical length of the line of rabbet joint 3, to realize antenna miniaturization in various degree, it is also possible to changes the low frequency operation frequency of antenna
The operating frequency of band and the operating frequency of high-frequency work frequency band.
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 from radiation
The distance of the line of rabbet joint 3, thus it is possible to vary the electricity of the operating frequency of antenna, the width of working band and the radiation line of rabbet joint 3 is long
Degree.
Change the quantity of loading capacitance 7, capacitance and spacing, the characteristic impedance of the low-resistance line of rabbet joint 8 can be regulated, change
Become the height impedance ratio of the Stepped Impedance radiation line of rabbet joint 3, and then change the operating frequency of the low frequency operation frequency band of antenna
Operating frequency with high-frequency work frequency band.
Change the width of the radiation line of rabbet joint 3, the low-resistance line of rabbet joint 8 and the characteristic impedance of the high resistant line of rabbet joint 9 can be regulated, change
Become the height impedance ratio of the Stepped Impedance radiation line of rabbet joint 3, and then change the operating frequency of the low frequency operation frequency band of antenna
Operating frequency with high-frequency work frequency band.
The electrical length of grid seam 6 should not be taken at 1/4th, to avoid causing resonance radiation, causes cross polarization
Rising.
The operating frequency of the low frequency operation frequency band of the slot antenna of double frequency grid seam ground capacitive load Stepped Impedance and height
Frequently the operating frequency of working band is mainly determined by the resonant frequency of the radiation line of rabbet joint 3, but the size on metal ground 2,
The conduction band 5 of microstrip feed line 4 can also be to the operating frequency of antenna and coupling in the position of the radiation line of rabbet joint 3 and width
Degree is adjusted.Owing to the radiation line of rabbet joint 3 existing low-resistance line of rabbet joint 8 has again the high resistant line of rabbet joint 9, constitute step resistance
The anti-radiation line of rabbet joint 3, not only makes antenna miniaturization, reduces cross polarization, also reduces metal ground 2
Size, but also so that antenna has multiple working band, and change the low-resistance line of rabbet joint 8 and the high resistant line of rabbet joint 9
Relative length, position and impedance, the position of two working bands can be adjusted respectively.Grid on metal ground 2
Seam 6 forms periodically loading to the radiation line of rabbet joint 3, makes again to radiate the line of rabbet joint 3 and becomes periodic slow-wave structure,
Further reduce 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 residue along the radiation line of rabbet joint 3 direction
The more concentration of CURRENT DISTRIBUTION, thus reduce cross-polarized radiation, also reduce the size on metal ground 2.
In technique, the slot antenna of double frequency grid seam ground capacitive load Stepped Impedance both can use common printing
Circuit board (PCB) technique, it would however also be possible to employ LTCC (LTCC) technique or CMOS, Si base
The integrated circuit technologies such as sheet realize.Electric capacity 7 can select the patch capacitor 7 of corresponding encapsulation according to operating frequency,
And according to the distance of electric capacity 7 two pins electrode, select the width of the low-resistance line of rabbet joint 8.
In accordance with the above, the present invention can just be realized.
Claims (6)
1. the slot antenna of a double frequency grid seam ground capacitive load Stepped Impedance, it is characterised in that this antenna includes
Medium substrate (1), the metal being arranged on medium substrate (1) ground (2) and the radiation line of rabbet joint (3), micro-strip feedback
Line (4)；The one side of medium substrate (1) is metal ground (2), and the another side of medium substrate (1) is micro-strip feedback
The conduction band (5) of line (4)；Having the radiation line of rabbet joint (3) on metal ground (2), the shape radiating the line of rabbet joint (3) is
Rectangle, the center of the radiation line of rabbet joint (3) with being positioned at metal (2)；Upper a plurality of parallel gate seam (6) of metal ground (2)
Grid seam (6) array constituted, the shape of grid seam (6) is rectangle, and grid seam is positioned at the four of the radiation line of rabbet joint (3)
In week, grid seam (6) are mutually perpendicular to the radiation line of rabbet joint (3)；The short at one end of grid seam (6)；Grid seam (6)
The other end is opened a way, and is positioned at the edge of medium substrate (1)；Two terminal shortcircuits of the radiation line of rabbet joint (3)；At radius
Seam (3) mid portion, has several electric capacity (7) to be connected in parallel across radiating two edges of the line of rabbet joint (3), makes
The characteristic impedance step-down of the line of rabbet joint (3) mid portion must be radiated, form the low-resistance line of rabbet joint (8)；The radiation line of rabbet joint (3)
Remainder be the high resistant line of rabbet joint (9), the high resistant line of rabbet joint (9) constitutes Stepped Impedance together with the low-resistance line of rabbet joint (8)
The radiation line of rabbet joint (3), produces one relatively low low frequency operation frequency band of frequency and the higher high-frequency work of frequency frequently
Band；Metal ground (2) is also the ground plane of described microstrip feed line (4), and one end of microstrip feed line (4) is
The port (10) of antenna, the other end of the conduction band (5) of microstrip feed line (4) strides across the high resistant line of rabbet joint (9),
The edge (11) of the high resistant line of rabbet joint (9), is connected with metal ground (2) by Shorted post (12).
The slot antenna of a kind of double frequency grid the most according to claim 1 seam ground capacitive load Stepped Impedance,
It is characterized in that changing thickness, pcrmeability and the dielectric constant of medium substrate (1), thus it is possible to vary the high resistant line of rabbet joint
And the characteristic impedance of the low-resistance line of rabbet joint (8) (9), the height impedance ratio of the Stepped Impedance radiation line of rabbet joint (3) is changed,
And then change operating frequency and the operating frequency of high-frequency work frequency band of the low frequency operation frequency band of antenna.
The slot antenna of a kind of double frequency grid the most according to claim 1 seam ground capacitive load Stepped Impedance,
It is characterized in that changing the length of the low-resistance line of rabbet joint (8), the low-resistance line of rabbet joint (8) position in the radiation line of rabbet joint (3)
Put, the electrical length of the radiation line of rabbet joint (3) can be regulated, to realize antenna miniaturization in various degree, it is also possible to
Change operating frequency and the operating frequency of high-frequency work frequency band of the low frequency operation frequency band of antenna.
The slot antenna of a kind of double frequency grid the most according to claim 1 seam ground capacitive load Stepped Impedance,
It is characterized in that changing the adjacent gate seam spacing of (6) in grid seam (6) array, grid the seam width of (6), grid
Seam (6) short-circuit end is from the distance of the radiation line of rabbet joint (3), thus it is possible to vary the operating frequency of antenna, working band
Width and the electrical length of the radiation line of rabbet joint (3).
The slot antenna of a kind of double frequency grid the most according to claim 1 seam ground capacitive load Stepped Impedance,
It is characterized in that changing quantity, capacitance and the spacing of loading capacitance (7), the low-resistance line of rabbet joint (8) can be regulated
Characteristic impedance, changes the height impedance ratio of the Stepped Impedance radiation line of rabbet joint (3), and then changes the low frequency work of antenna
Make operating frequency and the operating frequency of high-frequency work frequency band of frequency band.
The slot antenna of a kind of double frequency grid the most according to claim 1 seam ground capacitive load Stepped Impedance,
It is characterized in that changing the width of the radiation line of rabbet joint (3), the low-resistance line of rabbet joint (8) and the high resistant line of rabbet joint (9) can be regulated
Characteristic impedance, change Stepped Impedance radiation the line of rabbet joint (3) height impedance ratio, and then change antenna low frequency
The operating frequency of working band and the operating frequency of high-frequency work frequency band.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610216537.0A CN105846062A (en) | 2016-04-08 | 2016-04-08 | Dual-frequency gate slot ground capacitor loading stepped-impedance slot antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610216537.0A CN105846062A (en) | 2016-04-08 | 2016-04-08 | Dual-frequency gate slot ground capacitor loading stepped-impedance slot antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105846062A true CN105846062A (en) | 2016-08-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610216537.0A Pending CN105846062A (en) | 2016-04-08 | 2016-04-08 | Dual-frequency gate slot ground capacitor loading stepped-impedance slot antenna |
Country Status (1)
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| CN (1) | CN105846062A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019015206A1 (en) * | 2017-07-21 | 2019-01-24 | 深圳市景程信息科技有限公司 | Dual-frequency slot antenna with reconfigurable design structure |
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Application publication date: 20160810 |