CN105896051A - Semi-slot antenna with coplanar waveguide feed capacitor loading - Google Patents
Semi-slot antenna with coplanar waveguide feed capacitor loading Download PDFInfo
- Publication number
- CN105896051A CN105896051A CN201610218606.1A CN201610218606A CN105896051A CN 105896051 A CN105896051 A CN 105896051A CN 201610218606 A CN201610218606 A CN 201610218606A CN 105896051 A CN105896051 A CN 105896051A
- Authority
- CN
- China
- Prior art keywords
- line
- rabbet joint
- radiation
- antenna
- coplanar waveguide
- 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.)
- Pending
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Classifications
-
- 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
Abstract
The invention discloses a semi-slot antenna with coplanar waveguide feed 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 coplanar waveguide feed line (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 is open-circuited; a plurality of capacitors (7) are in parallel bridge connection onto two edges of the radiation slot (3); one end of the coplanar waveguide feed line (4) is an antenna port (8), and a conductor (9) at the other end of the coplanar waveguide feed line (4) passes across the radiation slot (3) to be connected with the metal ground (2) at the edge (10) of the radiation slot (3). The antenna size and cross polarization can be reduced.
Description
Technical field
The present invention relates to a kind of slot antenna, half slot antenna of a kind of coplanar wave guide feedback 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 half slot antenna of a kind of coplanar wave guide feedback capacitive load, 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: half slot antenna of the coplanar wave guide feedback capacitive load of the present invention includes medium substrate, is arranged on medium
Metal ground on substrate and the radiation line of rabbet joint, coplanar waveguide feeder line；The one side of medium substrate be metal and coplanar waveguide feeder line,
The ground plane of coplanar waveguide feeder line is exactly metal ground；Metal has the radiation line of rabbet joint on the ground, and the shape of the radiation line of rabbet joint is rectangle, spoke
Penetrate the line of rabbet joint and be positioned at the center on metal ground；Short at one end, the other end is opened a way；Several electric capacity is had to be connected in parallel across radiating the line of rabbet joint
Two edges so that the characteristic impedance step-down of the radiation line of rabbet joint；One end of coplanar waveguide feeder line is the port of antenna, coplanar ripple
The conductor leading the feeder line other end strides across the radiation line of rabbet joint, radiation the line of rabbet joint edge, with metal be connected.
Change the quantity of loading capacitance, capacitance and spacing, the characteristic impedance of the radiation line of rabbet joint can be regulated, thus it is possible to vary antenna
Operating frequency, the width of working band and radiation the line of rabbet joint electrical length.
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 master of half slot antenna of coplanar wave guide feedback capacitive load
To be determined by the resonant frequency of the radiation line of rabbet joint, but the size on metal ground, coplanar waveguide feeder line conductor are connected with the radiation line of rabbet joint
Position the operating frequency of antenna and matching degree can also be adjusted.Owing to the radiation line of rabbet joint 3 is quarter-wave
Resonance structure, more half as large than the radiation slot length of 1/2nd wavelength of usual two terminal shortcircuits, therefore antenna is whole
Body size reduces the most accordingly, and occlusion effect reduces further.
Beneficial effect: half slot antenna of the coplanar wave guide feedback capacitive load of the present invention provides the benefit that, this antenna is permissible
Reduce the electric size of whole antenna, realize miniaturization, the most also there is the cross polarization effect of suppression antenna.
Accompanying drawing explanation
Fig. 1 is half slot antenna overall structure schematic diagram of coplanar wave guide feedback capacitive load.
Figure has: medium substrate 1, metal ground 2, the radiation line of rabbet joint 3, coplanar waveguide feeder line 4, ground plane 5, the other end
6, electric capacity 7, port 8, conductor 9 and edge 10.
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: half slot antenna of coplanar wave guide feedback capacitive load include medium substrate 1,
The metal ground 2 being arranged on medium substrate 1 and the radiation line of rabbet joint 3, coplanar waveguide feeder line 4；The one side of medium substrate 1 is
Metal ground 2 and coplanar waveguide feeder line 4, the ground plane 5 of coplanar waveguide feeder line 4 is exactly metal ground 2；Have on metal ground 2
The radiation line of rabbet joint 3, 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；The radiation line of rabbet joint 3
Short at one end, the other end 6 is opened a way；Several electric capacity 7 is had to be connected in parallel across radiating two edges of the line of rabbet joint 3 so that spoke
Penetrate the characteristic impedance step-down of the line of rabbet joint 3；One end of coplanar waveguide feeder line 4 is the port 8 of antenna, and coplanar waveguide feeder line 4 is another
The conductor 9 of one 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 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 operating frequency of half slot antenna of coplanar wave guide feedback capacitive load is mainly determined by the resonant frequency of the radiation line of rabbet joint 3,
But the position that the size on metal ground 2, coplanar waveguide feeder line conductor 9 are connected with the radiation line of rabbet joint 3 can also be to the work of antenna
Working frequency and matching degree are adjusted.Owing to the radiation line of rabbet joint 3 is quarter-wave resonance structure, than usual two ends
The radiation slot length of 1/2nd wavelength of short circuit is half as large, and therefore the overall dimensions of antenna reduces the most accordingly, blocks
Effect reduces further.
In technique, half slot antenna of coplanar wave guide feedback capacitive load both can use 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 according to operating frequency, and according to the distance of electric capacity 7 two pins electrode,
The width of the selective radiation line of rabbet joint 3.
In accordance with the above, the present invention can just be realized.
Claims (2)
1. half slot antenna of a coplanar wave guide feedback capacitive load, it is characterised in that this antenna include medium substrate (1),
Metal ground (2) being arranged on medium substrate (1) and the radiation line of rabbet joint (3), coplanar waveguide feeder line (4)；Medium substrate
(1) one side is metal ground (2) and coplanar waveguide feeder line (4), and the ground plane (5) of coplanar waveguide feeder line (4) is just
It is metal ground (2)；Having the radiation line of rabbet joint (3) on metal ground (2), the shape of the radiation line of rabbet joint (3) is rectangle, radius
The center of seam (3) with being positioned at metal (2)；The short at one end of the radiation line of rabbet joint (3), the other end (6) is opened a way；There is number
Individual electric capacity (7) is connected in parallel across radiating two edges of the line of rabbet joint (3) so that the characteristic impedance of the radiation line of rabbet joint (3) becomes
Low；One end of coplanar waveguide feeder line (4) is the port (8) of antenna, the conductor (9) of coplanar waveguide feeder line (4) other end
Stride across radiation the line of rabbet joint (3), radiation the line of rabbet joint (3) edge (10), with metal (2) be connected.
Half slot antenna of a kind of coplanar wave guide feedback capacitive load the most according to claim 1, it is characterised in that change
Become quantity, capacitance and the spacing of loading capacitance (7), 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).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610218606.1A CN105896051A (en) | 2016-04-08 | 2016-04-08 | Semi-slot antenna with coplanar waveguide feed capacitor loading |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610218606.1A CN105896051A (en) | 2016-04-08 | 2016-04-08 | Semi-slot antenna with coplanar waveguide feed capacitor loading |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105896051A true CN105896051A (en) | 2016-08-24 |
Family
ID=57012352
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610218606.1A Pending CN105896051A (en) | 2016-04-08 | 2016-04-08 | Semi-slot antenna with coplanar waveguide feed capacitor loading |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105896051A (en) |
-
2016
- 2016-04-08 CN CN201610218606.1A patent/CN105896051A/en active Pending
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| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160824 |