CN105896050A - Slot antenna with gate gap ground capacitor loading - Google Patents
Slot antenna with gate gap ground capacitor loading Download PDFInfo
- Publication number
- CN105896050A CN105896050A CN201610218508.8A CN201610218508A CN105896050A CN 105896050 A CN105896050 A CN 105896050A CN 201610218508 A CN201610218508 A CN 201610218508A CN 105896050 A CN105896050 A CN 105896050A
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- CN
- China
- Prior art keywords
- rabbet joint
- line
- radiation
- antenna
- seam
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
-
- 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
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- Waveguide Aerials (AREA)
Abstract
The invention discloses a slot antenna with gate gap ground capacitor loading, which relates to a slot antenna. The antenna 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) and multiple parallel gate gaps (6); two ends of the radiation slot (3) are short-circuited; a plurality of capacitors (7) are in parallel bridge connection onto the edge of the rest part (9), except the part (8) intersected with the microstrip feeder (4), of the radiation slot (3); 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 radiation slot (3) and extends for a certain length. The antenna size, cross polarization, and shielding can be reduced, and isolation is improved.
Description
Technical field
The present invention relates to a kind of slot antenna, the slot antenna of a kind of grid seam ground 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 spoke
Penetrate the length of the line of rabbet joint itself and to have 1/2nd wavelength, and radiate and also need to bigger Metal ground around the line of rabbet joint and amass, logical
Often length 1/2nd wavelength bigger than the length of the line of rabbet joint on metal ground, the width big 1/2nd of the width ratio line of rabbet joint on metal ground
Wavelength.Bigger metal ground can make slot antenna be not suitable for multiple-input and multiple-output (MIMO) application, causes antenna
Cross polarization is deteriorated, and these all will cause the decline of spectrum efficiency and channel capacity.The impedance of the line of rabbet joint simultaneously is very big, also makes
The impedance matching obtaining slot antenna feeding transmission line is relatively difficult.
Summary of the invention
Technical problem: the purpose of the present invention is to propose to the slot antenna of a kind of grid seam ground capacitive load, this antenna can reduce spoke
Penetrate length and the area on metal ground of the line of rabbet joint, and there is the cross-polarized effect of suppression.
Technical scheme: the slot antenna of the grid seam ground capacitive load of the present invention includes medium substrate, is arranged on medium base
Metal ground on plate and the radiation line of rabbet joint, microstrip feed line；The one side of medium substrate is metal ground, and 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 of the radiation line of rabbet joint is rectangle, and the radiation line of rabbet joint is positioned at metal ground
Center；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 radius
The surrounding of seam, 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 medium
The edge of substrate；Two terminal shortcircuits of the radiation line of rabbet joint；Remove, at the radiation line of rabbet joint, the part intersected with microstrip feed line, have several
Electric capacity is connected in parallel across radiating two edges of the line of rabbet joint so that the characteristic impedance step-down of the radiation line of rabbet joint；Also it is described metal
The ground plane of microstrip feed line, one end of microstrip feed line is the port of antenna, and the other end of the conduction band of microstrip feed line strides across spoke
Penetrate the line of rabbet joint and stretch a segment length to terminal, the open-end of microstrip feed line；The conduction band of microstrip feed line has two parts to constitute,
Part I conduction band is the position just having crossed over the radiation line of rabbet joint from the port of antenna to it, its remaining part of the conduction band of microstrip feed line
It is divided into Part II conduction band.
Change the length and width of Part II conduction band, thus it is possible to vary the operating frequency of antenna, the width of working band and spoke
Penetrate the electrical length of the line of rabbet joint.
In change grid slot array, the spacing of adjacent gate seam, the width of grid seam, grid stitch the short-circuit end distance from the radiation line of rabbet joint, can
To change 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, change the spacing of adjacent metal via, radius can be regulated
The characteristic impedance of seam, 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.
The electrical length of grid seam should not be taken at 1/4th, to avoid causing resonance radiation, causes cross-polarized rising.
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 be reduced to be prone to
With feeding transmission lines matching volume, but also reduce the phase velocity of line of rabbet joint transmission line so that the length of the half-wavelength radiation line of rabbet joint subtracts
Little, it is achieved the radiation line of rabbet joint and then the miniaturization of antenna.The operating frequency of the slot antenna of grid seam ground capacitive load is mainly by spoke
The resonant frequency penetrating the line of rabbet joint determines, but metal ground size, microstrip feed line conduction band radiation the position of the line of rabbet joint, second
The operating frequency of antenna and matching degree can also be adjusted by the length and width dividing conduction band.Metal grid seam on the ground is right
Radius slit becomes periodically loading, makes again to radiate the line of rabbet joint and becomes periodic slow-wave structure, reduces the electricity of antenna
Size；Simultaneously because the direction of grid seam is vertical with the direction of the radiation line of rabbet joint, it is suppressed that metal is on the ground along radiation line of rabbet joint direction
Electric current, and make the more concentration along the remaining CURRENT DISTRIBUTION radiating line of rabbet joint direction, thus reduce cross-polarized spoke
Penetrate, also reduce the size on metal ground.
Beneficial effect: the slot antenna of the grid seam ground capacitive load of the present invention provides the benefit that, this antenna can reduce whole
The electric size of individual antenna, realize miniaturization, the most also there is the cross-polarized effect of suppression antenna.
Accompanying drawing explanation
Fig. 1 is the slot antenna overall structure schematic diagram of grid seam ground capacitive load.
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,
Part 8, other parts 9, port 10, Part I conduction band 11 and the Part II conduction band 12 intersected.
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 grid seam ground capacitive load includes medium substrate 1, sets
Put the metal ground 2 on medium substrate 1 and the radiation line of rabbet joint 3, microstrip feed line 4；The one side of medium substrate 1 is metal ground 2,
The another side of medium substrate 1 is the conduction band 5 of microstrip feed line 4；The radiation line of rabbet joint 3 is had on metal ground 2, the radiation line of rabbet joint 3
Shape is rectangle, and the radiation line of rabbet joint 3 is positioned at the center on metal ground 2；The grid seam of a plurality of parallel gate seam 6 composition on metal ground 2
6 arrays, 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 mutual with the radiation line of rabbet joint 3
Vertically；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；The radiation line of rabbet joint 3
Two terminal shortcircuits；Remove, at the radiation line of rabbet joint 3, the part 8 intersected with microstrip feed line 4, have the bridging in parallel of several electric capacity 7
Two edges at the radiation line of rabbet joint 3 so that the characteristic impedance step-down of the radiation line of rabbet joint 3；Metal ground 2 is also described micro-strip
The ground plane of feeder line 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 across
The overshoot line of rabbet joint 3 also stretches a segment length to terminal, the open-end of microstrip feed line 4；The conduction band 5 of microstrip feed line has two
Part is constituted, and Part I conduction band 11 is the position just having crossed over the radiation line of rabbet joint 3 from the port 10 of antenna to it, micro-strip
The remainder of the conduction band of feeder line is Part II conduction band 12.
Change the length and width of Part II conduction band 12, thus it is possible to vary the operating frequency of antenna, the width of working band
Electrical length with the radiation line of rabbet joint 3.
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 the radiation line of rabbet joint 3
Distance, thus it is possible to vary the operating frequency of antenna, the width of working band and radiation the line of rabbet joint 3 electrical length.
Change the quantity of loading capacitance 7, capacitance and spacing, the characteristic impedance of the radiation line of rabbet joint 3 can be regulated, 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 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 the slot antenna of grid seam ground capacitive load is mainly determined by the resonant frequency of the radiation line of rabbet joint 3, but golden
The size in possession 2, microstrip feed line 4 conduction band 5 radiation the position of the line of rabbet joint 3, the length of Part II conduction band 12 and
The operating frequency of antenna and matching degree can also be adjusted by width.Grid seam 6 on metal ground 2 is to the radiation line of rabbet joint 3
Formed and periodically load, make again to radiate the line of rabbet joint 3 and become periodic slow-wave structure, 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, it is suppressed that along the radiation line of rabbet joint 3 direction on metal ground 2
Electric current, and make the more concentration of remaining CURRENT DISTRIBUTION along the radiation line of rabbet joint 3 direction, thus reduce cross polarization
Radiation, also reduce metal ground 2 size.
In technique, the slot antenna of grid seam ground capacitive load both can use common printed circuit board (PCB) (PCB) technique,
The integrated circuit technologies such as LTCC (LTCC) technique or CMOS, Si substrate can also be used to realize.Electric capacity
7 patch capacitors 7 that can select corresponding encapsulation according to operating frequency, and according to the distance of electric capacity 7 two pins electrode, choosing
Select the width of the radiation line of rabbet joint 3.
In accordance with the above, the present invention can just be realized.
Claims (4)
1. the slot antenna of a grid seam ground capacitive load, it is characterised in that this antenna includes medium substrate (1), arranges
Metal ground (2) on medium substrate (1) and the radiation line of rabbet joint (3), microstrip feed line (4)；Medium substrate (1)
One side is metal ground (2), and the another side of medium substrate (1) is the conduction band (5) of microstrip feed line (4)；Metal ground (2)
On have a radiation line of rabbet joint (3), the shape of the radiation line of rabbet joint (3) is rectangle, the radiation line of rabbet joint (3) with being positioned at metal (2)
Center；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 square
Shape, 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)；Grid seam (6)
Short at one end；The other end open circuit of grid seam (6), is positioned at the edge of medium substrate (1)；The radiation line of rabbet joint (3)
Two terminal shortcircuits；Remove the part (8) intersected with microstrip feed line (4) in the radiation line of rabbet joint (3), have several electric capacity (7)
It is connected in parallel across radiating two edges of the line of rabbet joint (3) so that the characteristic impedance step-down of the radiation line of rabbet joint (3)；Metal ground (2)
Also being the ground plane of described microstrip feed line (4), one end of microstrip feed line (4) is the port (10) of antenna, micro-strip
The other end of the conduction band (5) of feeder line (4) strides across the radiation line of rabbet joint (3) and stretches a segment length to terminal, microstrip feed line
(4) open-end；The conduction band (5) of microstrip feed line has two parts to constitute, and Part I conduction band (11) is from antenna
Port (10) to it just crossed over radiation the line of rabbet joint (3) position, the remainder of the conduction band of microstrip feed line is second
Part conduction band (12).
The slot antenna of a kind of grid the most according to claim 1 seam ground capacitive load, it is characterised in that change second
The length and width of part conduction band (12), thus it is possible to vary the operating frequency of antenna, the width of working band and the radiation line of rabbet joint
(3) electrical length.
The slot antenna of a kind of grid the most according to claim 1 seam ground capacitive load, it is characterised in that change grid seam
(6) in array, the adjacent gate seam spacing of (6), the grid seam width of (6), grid stitch (6) short-circuit end from the radiation line of rabbet joint (3)
Distance, thus it is possible to vary the operating frequency of antenna, the width of working band and radiation the line of rabbet joint (3) electrical length.
The slot antenna of a kind of grid the most according to claim 1 seam ground capacitive load, it is characterised in that change and load
Quantity, capacitance and the spacing of electric capacity (7), can regulate the characteristic impedance of the radiation line of rabbet joint (3), thus it is possible to vary antenna
Operating frequency, the width of working band and the electrical length of the radiation line of rabbet joint (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610218508.8A CN105896050A (en) | 2016-04-08 | 2016-04-08 | Slot antenna with gate gap ground capacitor loading |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610218508.8A CN105896050A (en) | 2016-04-08 | 2016-04-08 | Slot antenna with gate gap ground capacitor loading |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105896050A true CN105896050A (en) | 2016-08-24 |
Family
ID=57012323
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610218508.8A Pending CN105896050A (en) | 2016-04-08 | 2016-04-08 | Slot antenna with gate gap ground capacitor loading |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105896050A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006097496A1 (en) * | 2005-03-15 | 2006-09-21 | Fractus, S.A. | Slotted ground-plane used as a slot antenna or used for a pifa antenna |
| US7123200B1 (en) * | 1990-05-02 | 2006-10-17 | Nortel Networks Limited | Sea surface antenna |
| CN104124527A (en) * | 2014-07-22 | 2014-10-29 | 南京邮电大学 | High-isolation slot antenna array |
-
2016
- 2016-04-08 CN CN201610218508.8A patent/CN105896050A/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 |
| WO2006097496A1 (en) * | 2005-03-15 | 2006-09-21 | Fractus, S.A. | Slotted ground-plane used as a slot antenna or used for a pifa antenna |
| CN104124527A (en) * | 2014-07-22 | 2014-10-29 | 南京邮电大学 | High-isolation slot antenna array |
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| PB01 | Publication | ||
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Application publication date: 20160824 |