CN208299046U - A kind of high-isolation dual-band and dual-polarization omnidirectional antenna - Google Patents
A kind of high-isolation dual-band and dual-polarization omnidirectional antenna Download PDFInfo
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- CN208299046U CN208299046U CN201820520210.7U CN201820520210U CN208299046U CN 208299046 U CN208299046 U CN 208299046U CN 201820520210 U CN201820520210 U CN 201820520210U CN 208299046 U CN208299046 U CN 208299046U
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Abstract
The utility model discloses a kind of high-isolation dual-band and dual-polarization omnidirectional antennas, the antenna includes antenna radiation unit, horizontal feed element and vertical feed element, cuboid that the antenna radiation unit is open by a bore face and the trapezoidal back chamber to crack are constituted, cuboid right side and the left side of trapezoidal back chamber are affixed, the horizontal feed element is the gradual change form sheet metal for being provided with U-lag, the horizontal feed element is located in the cuboid of bore face opening, and it is intracavitary that the vertical feed element is located at the trapezoidal back to crack.The utility model antenna can realize preferable horizontal, vertical bipolar omnidirectional's coverage property in two frequency ranges of 2.32-2.52GHz and 5.09-5.97GHz, be suitable for mobile communication field.
Description
Technical field
The utility model relates to mobile communication antenna technical fields, and in particular to a kind of high-isolation dual-band and dual-polarization omnidirectional
Antenna.
Background technique
With the progress of science and technology, mobile communication increasingly plays irreplaceable role, day in people's lives
Line is also developed rapidly as part essential in mobile communication.A new generation technical standard constantly propose, 2G,
The situation that 3G, 4G and 5G coexist becomes inevitable, this just needs communication equipment to support more frequency ranges, will also require antenna to have more
The characteristics of frequencyization.Multifrequency antenna not only contributes to reduce the antenna amount in mobile communication system, to realize the small-sized of equipment
Change, integrated and multifunction, and can satisfy the demand of a large amount of high speed information transmitting between user.In September, 2009
IEEE official definition IEEE 802.11n standard, it is specified that: 2.4-2.4835GHz and 5.15-5.85GHz is as wireless WiFi work
Make frequency range.Nowadays, WiFi has become people and lives the indispensable communication technology, therefore studies the double frequency for covering above-mentioned frequency range
Dual-polarization omnidirectional antenna become it is extremely necessary with it is significant.
Dual polarized antenna is a kind of application of polarization diversity technique, it is to utilize two irrelevant polarization orthogonal electromagnetism
Signal obtains certain diversity gain, and compared with other diversity techniques, dual polarized antenna has number of antennas few, small in size
The advantages that.In addition to this, it in the case that dual polarized antenna can also keep equipment output power and bandwidth constant, effectively improves and is
The utilization rate of system capacity and radio spectrum resources.
Omnidirectional antenna refers to the antenna for having certain beam angle in 360 ° of homogeneous radiations of horizontal plane, vertical plane, Gu Qifa
The signal penetrated can be received by the receiving end of horizontal plane arbitrary orientation, while can receive the signal of horizontal plane all directions, wide
Broadcast the wireless communication fields extensive application such as TV, mobile communication base station, WLAN, satellite communication, high-speed aircraft.
It is that the single polarized omnidirectional antenna of double frequency, single-frequency dual polarization are complete mostly at present in mobile communication associated antenna field
It is fewer and fewer to the research of dual-band and dual-polarization omnidirectional antenna to antenna and dual-band and dual-polarization directional aerial.
Utility model content
Purpose of the utility model is to solve drawbacks described above in the prior art, and it is double to provide a kind of high-isolation double frequency
Polarized omnidirectional antenna.
The purpose of this utility model can be reached by adopting the following technical scheme that:
A kind of high-isolation dual-band and dual-polarization omnidirectional antenna, the antenna include antenna radiation unit, horizontal feed list
First and vertical feed element, the cuboid that the antenna radiation unit is open by a bore face and the trapezoidal back chamber structure to crack
At the right side of cuboid and the left side of trapezoidal back chamber are affixed, and the horizontal feed element is to be provided with the gradual change shape of U-lag
Formula sheet metal is set in the cuboid of bore face opening；The vertical feed element minor matters different by several segments thickness
It constitutes, wherein intermediate minor matters feed, both ends branch open a way and to the cutler feeds of trapezoidal back chamber, and the vertical feed is single
It is intracavitary that member is located at the trapezoidal back to crack；The horizontal feed element is connected with coaxial line respectively with the vertical feed element
It connects.
Further, the gradual change form sheet metal is oval gradual change, round gradual change or parabolic grades.
Further, the gradual change form sheet metal is opened a way close to the one end in cuboid opening face, other end midpoint
For feeding point, and it is connect with coaxial line.
Further, the wire length of the gradual change form sheet metal is 0.35 λh-0.75λh, line width is 0.2 λh-0.6λh,
Wherein λhFor antenna high band center resonant frequency fhCorresponding wavelength in free space.
Further, the gradual change form sheet metal transversal centerline for being provided with U-lag is symmetrical, and the total length of U-lag is
0.3λh-0.6λh, the width of slot is 0.5mm-1mm, wherein λhFor antenna high band center resonant frequency fhIn free space
Corresponding wavelength.
Further, the U-lag opening direction face feeding point in the horizontal feed element.
Further, a length of 0.5 λ in the bore face of the cuboidL-0.8λL, width be 0.08 λL-0.25λL, depth
For 0.15 λL-0.35λL；
A height of 0.4 λ of the trapezoidal back chamberL-0.7λL, depth is 0.1 λL-0.3λL, the upper bottom long 0.01 of trapezoidal back chamber
λL-0.1λL, go to the bottom long 0.1 λL-0.3λL, wherein λLFor antenna low-frequency range center resonant frequency fLIt is corresponding in free space
Wavelength.
Further, trapezoidal three face of back chamber is provided with two gaps different in size, wherein short gap width is
0.01λL-0.03λL, short gap total length is 0.45 λh-0.65λh, long gap width is 0.01 λL-0.03λL, long gap overall length
Degree is 0.3 λL-0.5λL, wherein λLFor antenna low-frequency range center resonant frequency fLCorresponding wavelength in free space, λhFor
Antenna high band center resonant frequency fhCorresponding wavelength in free space.
Further, the vertical feed element is vertically arranged in close to the right side of trapezoidal back chamber.
It further, is 0.01 λ to the minor matters width that short gap is fed in the vertical feed elementh-0.02λh, to length
The minor matters width of cutler feed is 0.02 λL-0.03λL, wherein λhFor antenna high band center resonant frequency fhIn free space
In corresponding wavelength, λLFor antenna low-frequency range center resonant frequency fLCorresponding wavelength in free space.
The utility model compared with the existing technology have following advantages and effects
1) the utility model is made of two radiating elements, and horizontal radiation unit is the cuboid of bore face opening, is passed through
For bore face opening shape at omnidirectional radiation, vertical radiation unit is trapezoidal back chamber, double by being provided with two horizontal buckling gaps realizations
The polarization of frequency vertical omnidirection, the antenna structure is simple, is only made of metal, and processing cost is low.
2) the antenna horizontal polarization part can pass through the feed section and cuboid radiator of adjusting U-lag, vertical polarization
Part, which is adjusted gap length and feeds minor matters width, matches good and controllable frequency double-frequency resonance mode to realize.
3) gain of conventional omni-directional antenna is generally relatively low, and the maximum gain of the antenna can reach 6.3dBi.
4) isolation of the antenna is preferable, and the polarization isolation in low-frequency range is better than 36.6dB, the polarization on high band
Isolation is better than 40dB.
Detailed description of the invention
Fig. 1 is the perspective view of high-isolation dual-band and dual-polarization omnidirectional antenna disclosed by the utility model；
Fig. 2 is the top view of high-isolation dual-band and dual-polarization omnidirectional antenna disclosed by the utility model；
Fig. 3 is the front view of the horizontal feed element of high-isolation dual-band and dual-polarization omnidirectional antenna disclosed by the utility model；
Fig. 4 is the front view of the vertical feed element of high-isolation dual-band and dual-polarization omnidirectional antenna disclosed by the utility model；
Fig. 5 is the bandwidth figure of high-isolation dual-band and dual-polarization omnidirectional antenna disclosed by the utility model；
Fig. 6 is XOY of the cuboid of antenna radiation unit medium caliber disclosed by the utility model face opening at 2.45GHz
The antenna pattern of plane；
Fig. 7 is XOY of the cuboid of antenna radiation unit medium caliber disclosed by the utility model face opening at 5.5GHz
The antenna pattern of plane；
Fig. 8 is the radiation of XOY plane of the trapezoidal back chamber at 2.45GHz in antenna radiation unit disclosed by the utility model
Directional diagram；
Fig. 9 is the radiation of XOY plane of the trapezoidal back chamber at 5.5GHz in antenna radiation unit disclosed by the utility model
Directional diagram；
Wherein, appended drawing reference are as follows:
R--- antenna radiation unit, the horizontal feed element of HF---, the vertical feed element of VF---, C--- coaxial line.
Specific embodiment
It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched
The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.Based on the implementation in the utility model
Example, every other embodiment obtained by those of ordinary skill in the art without making creative efforts belong to
The range of the utility model protection.
Embodiment
As Figure 1-Figure 4, a kind of high-isolation dual-band and dual-polarization omnidirectional antenna, including antenna radiation unit R, horizontal feedback
Electric unit HF and vertical feed element VF, horizontal feed element HF and vertical feed element VF respectively with 50 ohm coaxial line C phases
Connection.
The antennas orthogonal is placed, the cuboid that antenna radiation unit R is open by a bore face and the trapezoidal back to crack
Chamber is constituted, and the plate of antenna radiation unit R is copper sheet, with a thickness of 0.2mm.The horizontal feed element HF is located at cuboid
It is interior, and be located at cuboid vertical direction middle position, the vertical feed element VF be placed on vertically it is trapezoidal back it is intracavitary, two
The plate of a feed element is copper sheet, and thickness is 0.2mm.
In the present embodiment, the cuboid of bore face opening realizes horizontal polarization, the long H1=0.64 λ in bore faceL, wide AB
=0.13 λL, cuboid depth is AE=0.23 λL, wherein λLFor antenna low-frequency range center resonant frequency fLIn free space
Corresponding wavelength.Horizontal feed element HF is gradual change form sheet metal, specially oval gradual change, round gradual change or parabola
Gradual change.The gradual change of elliptical form is used in the present embodiment, place transverse is a=16mm, short axle b=11.5mm, gradual change
Form sheet metal width is H_W=18mm, and gradual change form sheet metal is opened a way in one end close to bore face, and the other end is apart from antenna
Radiating element abutted surface d1=12.7mm, and its midpoint is connected with 50 ohm coaxial line C, opened U-lag is apart from gradual change form gold
Belong to piece short-circuit end d2=0.4mm, gap width s_u=0.9mm, total length is 0.46 λh, wherein λhFor the antenna high band center
Resonance frequency fhCorresponding wavelength in free space.
In the present embodiment, trapezoidal back chamber is for realizing vertical polarization, trapezoidal back chamber except in addition to cuboid abutted surface, other
Three faces are provided with gap, are L1=14mm in the opened long gap length of trapezoidal two isosceles vertical plane of back chamber, short gap length is L2=
4.5mm, so long gap total length is 0.41 λL, short gap total length is 0.56 λh, wherein λLIt is humorous for the antenna low-frequency range center
Vibration frequency fLCorresponding wavelength in free space, λhFor antenna high band center resonant frequency fhInstitute in free space
Corresponding wavelength.The trapezoidal long FG=4.4mm in back chamber upper bottom edge, go to the bottom side length HI=22mm, and two gap widths are W=3mm.It hangs down
The minor matters width vd3=1mm that straight feed element is fed to short gap is vd1=4mm to the minor matters width that long gap is fed.Institute
The vertical feed element stated is placed perpendicular to horizontal plane, and both ends are opened a way, and transitory branch byte wide is vd2=3mm, same with 50 ohm
Axis C is connected.The vertical feed element is d=1.6mm, the level apart from the vertical plane that trapezoidal back chamber bottom is formed
Feed element and vertical feed element are not connect other than being connected with coaxial line with other objects.
As shown in figure 5, be the present embodiment emulation gained the beamwidth of antenna, thus figure it could be assumed that, the utility model height every
From the bandwidth that degree dual-band and dual-polarization omnidirectional antenna has 2.32-2.52GHz, 5.09-5.97GHz, the return loss in the bandwidth
Reach -10dB, covers WIFI frequency range；And in the bandwidth, for polarization isolation in 36.6dB or more, isolation is higher.Figure
6- Fig. 9 is XOY plane antenna pattern of the present embodiment emulation gained antenna at different frequency, it can be obtained from the figure that conclusion out, this
Utility model high-isolation dual-band and dual-polarization omnidirectional antenna has preferable horizontal omnidirectional radiation characteristic.
Above-described embodiment is the preferable embodiment of the utility model, but the embodiments of the present invention is not by above-mentioned
The limitation of embodiment, it is made under other any spiritual essence and principles without departing from the utility model to change, modify, replacing
In generation, simplifies combination, should be equivalent substitute mode, is included within the protection scope of the utility model.
Claims (10)
1. a kind of high-isolation dual-band and dual-polarization omnidirectional antenna, which is characterized in that the antenna includes antenna radiation unit, water
Flat feed element and vertical feed element, the cuboid that the antenna radiation unit is open by a bore face and the ladder to crack
Shape is carried on the back chamber and is constituted, and the right side of cuboid and the left side of trapezoidal back chamber are affixed, and the horizontal feed element is to be provided with U-lag
Gradual change form sheet metal, be set to bore face opening cuboid in；The vertical feed element by several segments thickness not
One minor matters are constituted, wherein intermediate minor matters feed, both ends branch open a way and to the cutler feeds of trapezoidal back chamber, and described hangs down
It is intracavitary that straight feed element is located at the trapezoidal back to crack；The horizontal feed element with the vertical feed element respectively and together
Axis is connected.
2. a kind of high-isolation dual-band and dual-polarization omnidirectional antenna according to claim 1, which is characterized in that the gradual change
Form sheet metal is oval gradual change, round gradual change or parabolic grades.
3. a kind of high-isolation dual-band and dual-polarization omnidirectional antenna according to claim 1, which is characterized in that the gradual change
Form sheet metal is opened a way close to the one end in cuboid opening face, and other end midpoint is feeding point, and is connect with coaxial line.
4. a kind of high-isolation dual-band and dual-polarization omnidirectional antenna according to claim 1, which is characterized in that the gradual change
The wire length of form sheet metal is 0.35 λh-0.75λh, line width is 0.2 λh-0.6λh, wherein λhFor the antenna high band center resonance
Frequency fhCorresponding wavelength in free space.
5. a kind of high-isolation dual-band and dual-polarization omnidirectional antenna according to claim 1, which is characterized in that described is provided with
The gradual change form sheet metal transversal centerline of U-lag is symmetrical, and the total length of U-lag is 0.3 λh-0.6λh, the width of slot is 0.5mm-
1mm, wherein λhFor antenna high band center resonant frequency fhCorresponding wavelength in free space.
6. a kind of high-isolation dual-band and dual-polarization omnidirectional antenna according to claim 1, which is characterized in that the level
U-lag opening direction face feeding point in feed element.
7. a kind of high-isolation dual-band and dual-polarization omnidirectional antenna according to claim 1, which is characterized in that described is rectangular
A length of 0.5 λ in the bore face of bodyL-0.8λL, width be 0.08 λL-0.25λL, depth is 0.15 λL-0.35λL；
A height of 0.4 λ of the trapezoidal back chamberL-0.7λL, depth is 0.1 λL-0.3λL, long 0.01 λ in upper bottom of trapezoidal back chamberL-
0.1λL, go to the bottom long 0.1 λL-0.3λL, wherein λLFor antenna low-frequency range center resonant frequency fLCorresponding in free space
Wavelength.
8. a kind of high-isolation dual-band and dual-polarization omnidirectional antenna according to claim 1, which is characterized in that described is trapezoidal
Back three face of chamber is provided with two gaps different in size, wherein short gap width is 0.01 λL-0.03λL, short gap total length is
0.45λh-0.65λh, long gap width is 0.01 λL-0.03λL, long gap total length is 0.3 λL-0.5λL, wherein λLFor the day
Line low-frequency range center resonant frequency fLCorresponding wavelength in free space, λhFor antenna high band center resonant frequency fh
Corresponding wavelength in free space.
9. a kind of high-isolation dual-band and dual-polarization omnidirectional antenna according to claim 1, which is characterized in that described is vertical
Feed element is vertically arranged in close to the right side of trapezoidal back chamber.
10. a kind of high-isolation dual-band and dual-polarization omnidirectional antenna according to claim 8, which is characterized in that described vertical
Minor matters width in feed element to short gap feed is 0.01 λh-0.02λh, it is 0.02 to the minor matters width that long gap is fed
λL-0.03λL, wherein λhFor antenna high band center resonant frequency fhCorresponding wavelength in free space, λLFor the antenna
Low-frequency range center resonant frequency fLCorresponding wavelength in free space.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820520210.7U CN208299046U (en) | 2018-04-12 | 2018-04-12 | A kind of high-isolation dual-band and dual-polarization omnidirectional antenna |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820520210.7U CN208299046U (en) | 2018-04-12 | 2018-04-12 | A kind of high-isolation dual-band and dual-polarization omnidirectional antenna |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108448253A (en) * | 2018-04-12 | 2018-08-24 | 华南理工大学 | A kind of high-isolation dual-band and dual-polarization omnidirectional antenna |
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2018
- 2018-04-12 CN CN201820520210.7U patent/CN208299046U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108448253A (en) * | 2018-04-12 | 2018-08-24 | 华南理工大学 | A kind of high-isolation dual-band and dual-polarization omnidirectional antenna |
| CN108448253B (en) * | 2018-04-12 | 2023-07-18 | 华南理工大学 | High-isolation dual-frequency dual-polarization omnidirectional antenna |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181228 Termination date: 20210412 |
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| CF01 | Termination of patent right due to non-payment of annual fee |