CN109904604A - A kind of antenna - Google Patents
A kind of antenna Download PDFInfo
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- CN109904604A CN109904604A CN201910126139.3A CN201910126139A CN109904604A CN 109904604 A CN109904604 A CN 109904604A CN 201910126139 A CN201910126139 A CN 201910126139A CN 109904604 A CN109904604 A CN 109904604A
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- medium substrate
- antenna
- feeding network
- radiating
- layer medium
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Abstract
The embodiment of the present invention provides a kind of antenna, calibrates for microwave dark room.It include: integral medium substrate, feeding network, radiation cell array.The integral medium substrate is pressed by the first layer medium substrate, the second layer medium substrate that set gradually from top to bottom, the two, and the upper surface layers of copper of the second layer medium substrate etches completely.The feeding network is set to the lower surface of the first layer medium substrate, and the radiating curtain is respectively arranged at the upper surface of the first layer medium substrate and the lower surface of the second layer medium substrate.The radiating curtain up and down is full symmetric and is connected by plated through-hole.The feeding network end is connect by plated through-hole with the radiating curtain up and down, and the other end passes through round balun and connect with coaxial line.The radiating curtain is index tapered slot structure.The antenna not only solves the problem of high symmetry, big bandwidth, low common mode current can not get both, and also combines the advantages that light-weight, size is small, easy of integration.
Description
Technical field
The invention belongs to wireless communication fields, in particular to a kind of antenna, particularly for the calibration of microwave dark room.
Technical background
In the field of wireless communication, the test (OTA) of eating dishes without rice or wine of wireless device is increasingly becoming the mandatory item of industry, and most of
OTA test be to be carried out in the microwave dark room of simulation electromagnetic shielding.In recent years, with the explosive growth of wireless device,
To improve testing efficiency and breaking through the limitation of test site, Multi probe darkroom (MPAC) test macro increasingly becomes one kind and becomes
Gesture.However, the accuracy of microwave dark room calibration directly determines the accuracy and reliability of test result.The probe of MPAC is general
For dual polarized antenna, need to calibrate the vertical polarization and horizontal polarization of each probe during calibration.Traditional Polarimetric Calibration
Method otherwise be the multiplexing with dipole antenna or be dipole antenna and with magnetic bead loop aerial cooperation calibration, the former
Not only process is cumbersome, time-consuming consumption cost, and the accuracy and reliability calibrated is difficult to ensure；The latter's meeting due to magnetic bead
Making the efficiency of loop aerial reduces, and efficiency curve, which can acutely be shaken, when calibration causes the accuracy of calibration not reach requirement.
Existing dipole antenna is often able to satisfy the requirement of CTIA standard in performance and size.However, loop aerial
It is difficult to combine in terms of high gain symmetry, common mode current inhibit, are big in azimuth plane.Based on this, need a
The broadband annular antenna of the low common mode current of high symmetry makes up this accuracy for being not sufficient to ensure that microwave dark room calibration.
Summary of the invention
It is an object of the invention to propose a kind of antenna, it can be used for the polarized calibration of darkroom probe vertical.On solving
State problem, the present invention adopts the following technical scheme that: the antenna includes integral medium substrate, feeding network, 6 radiating element shapes
At radiating curtain.Wherein, the integral medium substrate is set gradually from top to bottom first layer medium substrate, second layer medium
Substrate, the two forms integral medium substrate by pressing, wherein the upper surface layers of copper of the second layer medium substrate etches completely
Fall.The feeding network is set to the lower surface of the first layer medium substrate, and the radiating curtain is respectively arranged at described
The upper surface of one layer of medium substrate and the lower surface of the second layer medium substrate.The radiating curtain up and down is full symmetric and logical
Cross several metallization aperture connections.The feeding network end is connected with the radiating curtain up and down respectively by metallization aperture
It connects, the feeding network other end passes through round balun and connect with coaxial line.The feeding network passes sequentially through coaxial line and turns band
Shape cable architecture, strip line turn trough cable architecture goes out signal from the exponential fade radiating curtain structural radiation, to be formed
The horizontally-polarized electromagnetic wave of omnidirectional.
Further, the feeding network includes 1 one point three power splitter units, 3 quarter-wave impedance transformation
Device and 3 one-to-two T shape knot power splitter units, the T shape knot power splitter are connect with one point of three power splitter unit；The feedback
Electric network is fed to 6 radiating elements for dividing input signals into 6 tunnel constant amplitude in-phase signals respectively.
Further, setting metallization aperture between one point of three power splitter unit connects the radiating curtain up and down
It connects, intercoupling between reduction signal, to reduce the cross polarization of the antenna.
Further, the radiating element includes the notching construction, short straight trough line, fluting cavity body structure, circle of exponential fade
Arc groove, the long line of rabbet joint.The notching construction of the exponential fade, the short straight trough line, the fluting cavity body structure are sequentially connected
It connects.
Further, the fluting cavity body structure works as a buffer the electromagnetic wave for being coupled to the short straight trough line, to subtract
Small return loss.
Further, the radiating element radially opens several arc-shaped slots along medium substrate.The arc-shaped slot
Surface wave can be inhibited to propagate on the radiating element, so that signal is radiated from the notching construction of the exponential fade as much as possible
It goes out, increases the uniformity of current distribution, to improve the symmetry of antenna pattern in the antenna bearingt face.
Further, several elongated slots are opened on the radiating element.There are two purposes for the elongated slot: first is that making described
Antenna forms resonance in certain frequency points, increases bandwidth.Second is that the elongated slot can increase the stroke of electromagnetic wave to reduce diffraction, from
And reduce the coupling between the radiating element.The antenna is horizontally polarized omnidirectional antenna, is meeting the same of calibration performance requirement
When, effectively evade and inhibit common mode current bring uncertain using magnetic bead, also takes into account that light-weight, size is small, at low cost, easy
The advantages that integrated.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as to model
The restriction enclosed for those of ordinary skill in the art without creative efforts, can also be according to these
Attached drawing obtains other relevant attached drawings.
Fig. 1 is a kind of overall structure diagram of antenna provided in an embodiment of the present invention；
Fig. 2 is upper radiating curtain structural schematic diagram provided in an embodiment of the present invention；
Fig. 3 is a kind of antenna side structure schematic view provided in an embodiment of the present invention；
Fig. 4 is radiative unit structure schematic diagram provided in an embodiment of the present invention；
Fig. 5 is feed network structures schematic diagram provided in an embodiment of the present invention；
Fig. 6 is integral medium substrate open-celled structure schematic diagram provided in an embodiment of the present invention；
Relationship of the Fig. 7 between antenna external input port return loss provided in an embodiment of the present invention and working frequency is bent
Line chart；
Fig. 8 is the curve in azimuth plane provided in an embodiment of the present invention between antenna pattern symmetry and working frequency
Figure；
Fig. 9 is cross polarization provided in an embodiment of the present invention than the curve graph between working frequency；
Main polarization, the Cross polarization pattern in the face E and the face H when Figure 10 is 3.2GHz provided in an embodiment of the present invention；
Icon: 1- first layer medium substrate；2- second layer medium substrate；The upper radiating curtain of 11-；111- arc-shaped slot；
112- long slot structure；The 113- exponential fade line of rabbet joint；114- elliptical cavity notching construction；12- feeding network；13- plated through-hole；
Radiating curtain under 21-；3- external input port.
Specific embodiment
Below in conjunction with attached drawing in the embodiment of the present invention, technical solution in the embodiment of the present invention is carried out clear and completely
Description, described embodiments are only a part of the embodiments of the present invention, rather than whole embodiments.Skill common for this field
For art personnel, without creative efforts, it is also possible to obtain other drawings based on these drawings, and obtain
Other embodiments, shall fall within the protection scope of the present invention.
It should also be noted that similar label indicates similar terms, once a certain item is defined in the accompanying drawings, then in subsequent attached drawing
In do not need to its further definition and explain.In the present invention, term " 1 " not only indicates " only this 1 ", can also indicate
The situation of " extra 1 ", term " first ", " second " etc. are only used for distinguishing description, are not understood to indicate or imply opposite
Importance.
Fig. 1 is a kind of overall structure diagram of antenna provided in an embodiment of the present invention, and Fig. 2 provides for the embodiment of the present invention
A kind of antenna overlooking structure diagram, Fig. 3 be a kind of side structure schematic view of antenna provided in an embodiment of the present invention, ask
Referring to FIG. 1, FIG. 2 and FIG. 3, the antenna includes: integral medium substrate, feeding network 12, upper radiating curtain 11, lower radiating curtain
21.Wherein, the medium substrate includes the first layer medium substrate 1 being from top to bottom arranged, second layer medium substrate 2, it is described on
Radiating curtain 11 is set to the upper surface of the first layer medium substrate 1, and the feeding network 12 is set to the first layer and is situated between
The lower surface of matter substrate 1, the lower radiating curtain 21 are set to the lower surface of the second layer medium substrate 2, the second layer
The upper surface of medium substrate 2 etches away completely, and the first layer medium substrate 1 and the second layer medium substrate 2 pass through pressing
Form integral medium substrate.The dielectric constant and loss angle tangent of two layers of medium substrate are respectively set to 2.65 and 0.005,
Plate thickness is 1mm.The upper and lower radiating curtain 11,21 is connected by the aperture 13 that metallizes, and 12 end of feeding network is logical
It crosses metallization aperture and couples the upper and lower radiating curtain 11,21 for electromagnetic wave, 12 beginning of feeding network passes through round bar
Human relations are connected with coaxial line.
Specifically, electromagnetic wave is transmitted to external input port 3 in coaxial line, is drawn signal by the feeding network 12
It is divided into 6 tunnel constant amplitudes with the signal of phase, is fed to 6 radiating elements respectively, please refers to Fig. 4.The radiating element generates wide
Beam radiation pattern can form horizontally polarized omnidirectional antenna pattern in far field superposition.
Referring to figure 4., Fig. 4 is radiating element schematic diagram provided in an embodiment of the present invention, and the radiating element includes: circular arc
Shape slot, long slot structure, exponential fade slotted line, short straight trough line, elliptical cavity notching construction.It is the exponential fade line of rabbet joint 113, short
Straight trough line and elliptical cavity notching construction 114 are in turn connected to form gap structure, and the fluting cavity body structure 114 is to being coupled to
The electromagnetic wave for stating short straight trough line works as a buffer, to reduce return loss.Several 111 energy of arc-shaped slot are radially opened in medium substrate
Effectively inhibit surface wave in the radial propagation of the radiating element, so that signal is as much as possible from the fluting knot of the exponential fade
Structure is radiate, and increases the uniformity of current distribution, to improve the symmetry of antenna pattern in the antenna bearingt face.
Several elongated slots are opened on the radiating element, there are two purposes for the elongated slot 112: first is that the antenna is made to exist
Certain frequency points form resonance, increase bandwidth.Second is that the elongated slot can increase the stroke of electromagnetic wave to reduce diffraction, to reduce
Coupling between the radiating element.
Fig. 5 is feed network structures schematic diagram provided in an embodiment of the present invention, and Fig. 6 is entirety provided in an embodiment of the present invention
Medium substrate open-celled structure schematic diagram.Referring to figure 5. and Fig. 6, the feeding network 12 is by 1 one point of three power splitter, 3 four points
One of wavelength impedance transformers and 3 one-to-two T shape knot power splitters composition.The signal of input is divided by the feeding network 12
6 tunnel constant amplitudes are fed respectively on the radiating element with the signal of phase.The metallization is set between one point of three power splitter
Aperture 13 connects the radiating curtain 11,12 up and down, intercoupling between reduction signal, to reduce the intersection of the antenna
Polarization.The antenna is horizontally polarized omnidirectional antenna, while meeting calibration performance requirement, effectively evades and being pressed down using magnetic bead
Common mode current bring processed is uncertain, also takes into account the advantages that light-weight, size is small, at low cost, easy of integration.
Relationship of the Fig. 7 between antenna external input port return loss provided in an embodiment of the present invention and working frequency is bent
Line chart；Fig. 8 is the curve graph in azimuth plane provided in an embodiment of the present invention between antenna pattern symmetry and working frequency；Figure
9 be cross polarization provided in an embodiment of the present invention than the curve graph between working frequency；Figure 10 provides for the embodiment of the present invention
3.2GHz when the face E and the face H main polarization, Cross polarization pattern.Fig. 7, Fig. 8, Fig. 9, Figure 10 are please referred to, with S11 < -10dB
It measures, the working frequency of antenna is 2.6GHz~3.2GHz (relative bandwidth 20%).Simultaneously in whole working frequency range, antenna emulation
Azimuth plane in antenna pattern symmetry within 0.1dB, be able to satisfy CTIA standard to calibration antenna symmetry want
It asks.In entire frequency range, the cross polarization ratio of antenna is all larger than 35dB, i.e., main polarization signal is bigger than cross-polarized signals at least
35dB, low-cross polarization play a crucial role the calibration of microwave dark room.Antenna main polarization E when 3.2GHz in Figure 10
Face directional diagram shows good omnidirectional radiation performance, and the face H directional diagram is also " ∞ " shape in the imagination.Meanwhile the face E and the face H
Also the lower cross polarization shown.Compared to existing loop aerial, antenna that this big bright embodiment provides can will be high right
Title property, low-cross polarization, big bandwidth are taken into account, and the calibration antenna of microwave dark room is suitable for.
The above is merely a preferred embodiment of the present invention, and is not intended to limit the present invention, for those skilled in the art
For member, the present invention can have various changes and change.All within the spirits and principles of the present invention, it is made it is any modification,
Equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (8)
1. a kind of antenna, which is characterized in that the antenna includes: that integral medium substrate, feeding network, 6 radiating elements are formed
Radiating curtain.Wherein, the integral medium substrate is by the first layer medium substrate, the second layer medium base that set gradually from top to bottom
Plate, the two is by pressing, wherein the upper surface layers of copper of the second layer medium substrate etches away completely.The feeding network
It is set to the lower surface of the first layer medium substrate, the radiating curtain is respectively arranged at the upper of the first layer medium substrate
The lower surface on surface and the second layer medium substrate.It is described that radiating curtain is full symmetric up and down and passes through several metallization apertures
Connection.The feeding network end is connect with the radiating curtain up and down respectively by metallization aperture, and the feeding network is another
One end passes through round balun and connect with coaxial line.The feeding network passes sequentially through coaxial line and turns strip lines configuration, and strip line turns
Slot line structure goes out signal from the exponential fade radiating curtain structural radiation, to form the horizontal polarization electromagnetism of omnidirectional
Wave.
2. antenna according to claim 1, which is characterized in that the feeding network include 1 one point three power splitter units,
3 quarter wavelength impedance transducers and 3 one-to-two T shape knot power splitter units, the T shape knot power splitter unit with it is described
One point of three power splitter unit connection；The feeding network is fed respectively for dividing input signals into 6 tunnel constant amplitude in-phase signals
To 6 radiating elements.
3. antenna according to claim 2, which is characterized in that the feeding network end by several metallization apertures and
The radiating curtain up and down is connected.The feeding network other end is connected with coaxial inner conductor.
4. antenna according to claim 3, which is characterized in that setting metallization is small between one point of three power splitter unit
Kong Kong makes the radiating curtain connection up and down, intercoupling between reduction signal, to reduce the cross polarization of the antenna.
5. antenna according to claim 1, which is characterized in that the radiating element includes: exponential fade notching construction, short
Straight trough line, ellipse fluting cavity body structure, arc-shaped slot, the long line of rabbet joint.The exponential fade notching construction, the short straight trough line,
The fluting cavity body structure, which is sequentially connected, to be connect.
6. antenna according to claim 5, which is characterized in that the ellipse fluting cavity body structure can be described in feed-in
The electromagnetic wave of short straight trough line works as a buffer, to reduce return loss.
7. antenna according to claim 5, which is characterized in that the radiating element radially opens several institutes along medium substrate
State arc-shaped slot.The arc-shaped slot can inhibit surface wave to propagate on the radiating element, so that signal is as much as possible from institute
It states exponential fade notching construction to radiate, increases the uniformity of current distribution, radiated to improve in the antenna bearingt face
The symmetry of directional diagram.
8. antenna according to claim 5, which is characterized in that open several elongated slots on the radiating element.It is described
Elongated slot can not only form resonance point and increase bandwidth, can also increase the stroke of electromagnetic wave to reduce diffraction, thus described in reducing
Coupling between radiating element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910126139.3A CN109904604B (en) | 2019-02-20 | 2019-02-20 | Antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910126139.3A CN109904604B (en) | 2019-02-20 | 2019-02-20 | Antenna |
Publications (2)
| Publication Number | Publication Date |
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| CN109904604A true CN109904604A (en) | 2019-06-18 |
| CN109904604B CN109904604B (en) | 2020-09-08 |
Family
ID=66945125
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910126139.3A Active CN109904604B (en) | 2019-02-20 | 2019-02-20 | Antenna |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112615150A (en) * | 2020-12-09 | 2021-04-06 | 上海中兴易联通讯股份有限公司 | Omnidirectional radiation unit with horizontal polarization |
| CN113474944A (en) * | 2019-12-05 | 2021-10-01 | 法国圣戈班玻璃厂 | Vehicle glazing |
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| CN112615150A (en) * | 2020-12-09 | 2021-04-06 | 上海中兴易联通讯股份有限公司 | Omnidirectional radiation unit with horizontal polarization |
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| Publication number | Publication date |
|---|---|
| CN109904604B (en) | 2020-09-08 |
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