CN105896057A - Slot antenna with coaxial feed capacitor loading - Google Patents
Slot antenna with coaxial feed capacitor loading Download PDFInfo
- Publication number
- CN105896057A CN105896057A CN201610218695.XA CN201610218695A CN105896057A CN 105896057 A CN105896057 A CN 105896057A CN 201610218695 A CN201610218695 A CN 201610218695A CN 105896057 A CN105896057 A CN 105896057A
- Authority
- CN
- China
- Prior art keywords
- rabbet joint
- line
- radiation
- antenna
- metal ground
- 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
Links
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 slot antenna with coaxial 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 coaxial feed line (4), wherein the metal ground (2) is provided with the radiation slot (3); two ends (6) of the radiation slot (3) are short-circuited; a plurality of capacitors (7) are in parallel bridge connection onto the edge of the radiation slot (3); one end of the coaxial feed line (4) is an antenna port (8), and an inner conductor (9) at the other end of the coaxial feed line (4) passes across the radiation slot (3) and is connected with the metal ground (2) at the edge (10) of the radiation slot (3). The antenna size and the cross polarization can be reduced.
Description
Technical field
The present invention relates to a kind of slot antenna, the slot antenna of a kind of 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 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 coaxial feed capacitive load, this antenna can reduce
The length of the radiation line of rabbet joint and the area on metal ground, and there is the cross-polarized effect of suppression.
Technical scheme: the slot antenna of the coaxial feed capacitive load of the present invention includes medium substrate, is arranged on medium substrate
On metal ground and radiation the line of rabbet joint, coaxial feeder；The one side of medium substrate is metal ground, the outer conductor of coaxial feeder and gold
Possession is affixed connection；Two terminal shortcircuits of the radiation line of rabbet joint；There is several electric capacity to be connected in parallel across radiating two edges of the line of rabbet joint, make
The characteristic impedance step-down of the line of rabbet joint must be radiated；One end of coaxial feeder is the port of antenna, the inner wire of the coaxial feeder other end
Stride 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 of the slot antenna of coaxial feed capacitive load mainly by
The resonant frequency of the radiation line of rabbet joint determines, but the position that the size on metal ground, coaxial feeder inner wire are connected with the radiation line of rabbet joint
The operating frequency of antenna and matching degree can also be adjusted.
Beneficial effect: the slot antenna of the coaxial feed capacitive load of the present invention provides the benefit that, this antenna can 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 the slot antenna overall structure schematic diagram of coaxial feed capacitive load.
Figure has: medium substrate 1, metal ground 2, the radiation line of rabbet joint 3, coaxial feeder 4, outer conductor 5, two ends 6, electricity
Hold 7, port 8, inner wire 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: the slot antenna of coaxial feed capacitive load includes medium substrate 1, arranges
Metal ground 2 on medium substrate 1 and the radiation line of rabbet joint 3, coaxial feeder 4；The one side of medium substrate 1 is metal ground 2,
The outer conductor 5 of coaxial feeder 4 is affixed with metal ground 2 and is connected；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；Two ends 6 short circuit of the radiation line of rabbet joint 3；There is several electric capacity
7 are 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；Coaxial feeder 4
One end 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 radiation line of rabbet joint 3
Edge 10, 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 the slot antenna of coaxial feed 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, coaxial feeder inner wire 9 are connected with the radiation line of rabbet joint 3 can also be to the operating frequency of antenna
It is adjusted with matching degree.
In technique, the slot antenna of coaxial feed capacitive load both can use common printed circuit board (PCB) (PCB) work
Skill, 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. the slot antenna of a coaxial feed capacitive load, it is characterised in that this antenna includes medium substrate (1), sets
Put metal ground (2) on medium substrate (1) and the radiation line of rabbet joint (3), coaxial feeder (4)；Medium substrate (1)
One side be metal ground (2), the outer conductor (5) of coaxial feeder (4) is affixed with metal ground (2) and is connected；Metal ground
(2) having the radiation line of rabbet joint (3) on, 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；Two ends (6) short circuit of the radiation line of rabbet joint (3)；Several electric capacity (7) is had to be connected in parallel across radiating the line of rabbet joint (3)
Two edges so that radiation the line of rabbet joint (3) characteristic impedance step-down；One end of coaxial feeder (4) is the port of antenna
(8), the inner wire (9) of coaxial feeder (4) other end strides across the radiation line of rabbet joint (3), on the limit of the radiation line of rabbet joint (3)
Edge (10), with metal (2) be connected.
The slot antenna of a kind of coaxial feed capacitive load the most according to claim 1, it is characterised in that change and add
Carry quantity, capacitance and the spacing of electric capacity (7), the characteristic impedance of the radiation line of rabbet joint (3) can be regulated, thus it is possible to vary antenna
Operating frequency, the width of working band and radiation the line of rabbet joint (3) electrical length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610218695.XA CN105896057A (en) | 2016-04-08 | 2016-04-08 | Slot antenna with coaxial feed capacitor loading |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610218695.XA CN105896057A (en) | 2016-04-08 | 2016-04-08 | Slot antenna with coaxial feed capacitor loading |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105896057A true CN105896057A (en) | 2016-08-24 |
Family
ID=57012577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610218695.XA Pending CN105896057A (en) | 2016-04-08 | 2016-04-08 | Slot antenna with coaxial feed capacitor loading |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105896057A (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 CN201610218695.XA patent/CN105896057A/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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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160824 |
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| RJ01 | Rejection of invention patent application after publication |