CN207250703U - Antenna structure - Google Patents
Antenna structure Download PDFInfo
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- CN207250703U CN207250703U CN201721215066.8U CN201721215066U CN207250703U CN 207250703 U CN207250703 U CN 207250703U CN 201721215066 U CN201721215066 U CN 201721215066U CN 207250703 U CN207250703 U CN 207250703U
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Abstract
A kind of antenna structure.The antenna structure includes：One earth element, one first irradiation unit, one second irradiation unit, one first feeding portion, and one second feeding portion.Second irradiation unit and the first radiant section are from wherein the first irradiation unit is between the second irradiation unit and earth element.First feeding portion includes one first coupling excitation portion and a first connecting portion.Second feeding portion includes one second coupling excitation portion and a second connecting portion.First coupling excitation portion and the second coupling excitation portion are all adjacent to first irradiation unit.One first line segment is formed by a central shaft of a central point to the antenna structure in the coupling excitation of connection first portion, and a second line segment is formed by the central shaft of a central point to the antenna structure in the coupling excitation of connection second portion, wherein the angle between the first line segment and second line segment is more than 90 degree.The utility model has the advantages such as broadband, dual polarization, high-isolation, simple in structure, low manufacture cost, and overcomes the problem of indoor communications quality is bad.
Description
Technical field
A kind of antenna structure is the utility model is related to, more particularly to a kind of broadband dual polarized antenna structure for coupling feed-in.
Background technology
With the prosperity of mobile communication technology, mobile device is more prevalent in recent years, it is common for example：Portable calculating
Machine, mobile phone, the portable electronic apparatus of multimedia player and other mixed functions.In order to meet the needs of people,
Mobile device usually has the function of wireless communication.Some cover the range for wireless communication of long range, such as：Mobile phone uses
2G, 3G, LTE (Long Term Evolution) system and its used 700MHz, 850MHz, 900MHz, 1800MHz,
The frequency band of 1900MHz, 2100MHz, 2300MHz and 2500MHz communicate, and some then cover short-range wireless communication
Scope, such as：Wi-Fi, Bluetooth system are communicated using the frequency band of 2.4GHz, 5.2GHz and 5.8GHz.
Wireless network base station (Wireless Access Point) be make mobile device indoors can high speed Internet access necessity
Element.However, since indoor environment is filled with signal reflex and multi-path decay (Multipath Fading), wireless network
Base station must be able to handle at the same time from all directions and various polarized signals.Therefore, how wireless network base station limited sky
Between in design a kind of broadband, the antenna in multipolarization direction, it has also become a major challenge of designer now.
Accordingly, it is desirable to provide a kind of antenna structure solves the above problems.
Utility model content
In the preferred embodiment, the utility model provides a kind of antenna structure, which includes：One earth element；
One first irradiation unit, first irradiation unit have one first perforate and one second perforate；One second irradiation unit, second irradiation unit
With first radiant section from wherein first irradiation unit is between second irradiation unit and the earth element；One first feedback
Enter portion, which includes an one first coupling excitation portion and first connecting portion, wherein one first signal source via this
One connecting portion is coupled to the first coupling excitation portion, which passes through first perforate, and the first coupling excitation portion
It is adjacent to first irradiation unit and between second irradiation unit and first irradiation unit；And one second feeding portion, this
Two feeding portions include one second coupling excitation portion and a second connecting portion, wherein a secondary signal source is via the second connecting portion coupling
Be connected to the second coupling excitation portion, which passes through second perforate, and the second coupling excitation portion be adjacent to this
One irradiation unit and between second irradiation unit and first irradiation unit；Wherein by the one of connection the first coupling excitation portion
One central shaft of central point to the antenna structure forms one first line segment, by the central point for connecting the second coupling excitation portion
The central shaft to the antenna structure forms a second line segment, and the angle between first line segment and the second line segment is more than
90 degree.
In certain embodiments, which is presented one first circular, second irradiation unit presentation, one second circle,
And the second circular area is slightly less than the first circular area.
In certain embodiments, the first circular radius and the second circular radius are all substantially equal to the antenna structure
A center frequency of operation 0.25 times of wavelength.
In certain embodiments, which is presented a square.
In certain embodiments, which is presented one the 3rd circular, the second coupling excitation portion's presentation one
4th is circular, and the 4th circular area is equal to the 3rd circular area.
In certain embodiments, the length of first line segment and the length of the second line segment are equal to each other.
In certain embodiments, the length of the length of first line segment and the second line segment is smaller than or equal to this day knot
0.125 times of wavelength of one center frequency of operation of structure.
In certain embodiments, the angle between first line segment and the second line segment is just equal to 98 degree.
In certain embodiments, which further includes：One support column, is connected to the earth element, and is used to support
First irradiation unit.
In certain embodiments, which further includes：One medium substrate, is arranged at first irradiation unit and the ground connection
Between element.
In a further preferred embodiment, the utility model provides a kind of antenna structure, which includes：One ground connection member
Part；One first irradiation unit；One second irradiation unit, second irradiation unit and first radiant section are from wherein first irradiation unit
Between second irradiation unit and the earth element；One first feeding portion, first feeding portion include one first coupling and excite
Portion and a first connecting portion, wherein one first signal source is coupled to the first coupling excitation portion via the first connecting portion, and are somebody's turn to do
First coupling excitation portion is adjacent to first irradiation unit and between first irradiation unit and the earth element；And one second
Feeding portion, which includes one second coupling excitation portion and a second connecting portion, wherein a secondary signal source is via this
Second connecting portion is coupled to the second coupling excitation portion, and the second coupling excitation portion is adjacent to first irradiation unit and between this
Between first irradiation unit and the earth element；Wherein by connecting the central point in the first coupling excitation portion to the antenna structure
A central shaft form one first line segment, by connect the central point in the second coupling excitation portion to the antenna structure this in
Mandrel forms a second line segment, and the angle between first line segment and the second line segment is more than 90 degree.
In certain embodiments, the angle between first line segment and the second line segment is just equal to 94 degree.
The antenna structure of the utility model at least has broadband, dual polarization, high-isolation, simple in structure, and low system
Cause the advantage such as this.Therefore, the antenna structure of the utility model is well suited for being applied to various indoor environments, to overcome tradition because of letter
Number reflection and multi-path decay the problem of causing communication quality bad.
Brief description of the drawings
Figure 1A shows the stereogram of the antenna structure according to one embodiment of the utility model.
Figure 1B shows the top view of the antenna structure according to one embodiment of the utility model.
Fig. 1 C show the side view of the antenna structure according to one embodiment of the utility model.
Fig. 1 D show the S parameter figure of the antenna structure according to one embodiment of the utility model.
Fig. 1 E show the S parameter figure of the antenna structure of the angle with 90 degree of the first line segment and second line segment.
Fig. 2A shows the stereogram of the antenna structure according to one embodiment of the utility model.
Fig. 2 B show the top view of the antenna structure according to one embodiment of the utility model.
Fig. 2 C show the side view of the antenna structure according to one embodiment of the utility model.
Fig. 2 D show the S parameter figure of the antenna structure according to one embodiment of the utility model.
Fig. 2 E show the S parameter figure of the antenna structure of the angle with 90 degree of the first line segment and second line segment.
Fig. 3 A show the stereogram of the antenna structure according to another embodiment of the utility model.
Fig. 3 B show the top view of the antenna structure according to another embodiment of the utility model.
Fig. 3 C show the side view of the antenna structure according to another embodiment of the utility model.
Fig. 3 D show the S parameter figure of the antenna structure according to another embodiment of the utility model.
Fig. 4 A show the stereogram of the antenna structure according to another embodiment of the utility model.
Fig. 4 B show the top view of the antenna structure according to another embodiment of the utility model.
Fig. 4 C show the side view of the antenna structure according to another embodiment of the utility model.
Fig. 4 D show the S parameter figure of the antenna structure according to another embodiment of the utility model.
Main element symbol description：
100th, 200,300,400 antenna structure
110th, 210 earth element
120th, 220 first irradiation unit
121 first perforates
122 second perforates
130th, 230 second irradiation unit
140th, 240 first feeding portion
141st, 241 first coupling excitation portion
142nd, 242 first connecting portion
145th, the central point in 245 first coupling excitation portions
150th, 250 second feeding portion
151st, 251 second coupling excitation portion
152nd, 252 second connecting portion
155th, the central point in 255 second coupling excitation portions
160th, 260 support column
171st, 271 first line segment
172nd, 272 second line segment
191st, 291 first signal source
192nd, 292 secondary signal source
380th, 480 medium substrate
D1、D11、D12、D2、D3、
D4, D41, D42 spacing
FB1, FB2, FB3, FB4 operational frequency bands
L1, L2 length
The central shaft of LC1, LC2 antenna structure
R1、R2、R3、R4、R5、R6、
R7, R8 radius
The characteristic curve of S11 S11 parameters
The characteristic curve of S22 S22 parameters
The characteristic curve of S21 S21 parameters
X X-axis
Y Y-axis
Z Z axis
θ 1,2 angles of θ
Embodiment
For the purpose of this utility model, feature and advantage can be become apparent, it is cited below particularly go out the utility model tool
Body embodiment, and attached drawing appended by cooperation, are described in detail below.
Some vocabulary has been used among specification and claims to censure specific element.Those skilled in the art
Should be it is understood that hardware manufacturer may call same element with different nouns.Present specification and claims
Not in a manner of the difference of title is used as and distinguishes element, but it is used as the standard of differentiation with the difference of element functionally
Then."comprising" and one word of " comprising " mentioned in working as in specification and claims in the whole text are open term, therefore should
When being construed to " include but be not limited to "." substantially " word then refers in acceptable error range, people in the art
Member can solve the technical problem within a certain error range, reach the basic technique effect.In addition, " coupling " word
In the present specification comprising any direct and indirect means of electrical connection.Therefore, if one first device of described in the text is coupled to
One second device, then the second device can be directly electrically connected to by representing the first device, or via other devices or connection hand
Section and be electrically connected to the second device indirectly.
Figure 1A shows the stereogram of the antenna structure 100 according to one embodiment of the utility model.Figure 1B shows basis
The top view of antenna structure 100 described in one embodiment of the utility model.Fig. 1 C are shown according to one embodiment institute of the utility model
The side view for the antenna structure 100 stated.Please also refer to Figure 1A, Figure 1B, Fig. 1 C.Antenna structure 100 can be applied to communication dress
Put, such as：One wireless network base station (Wireless Access Point).Figure 1A, Figure 1B, Fig. 1 C embodiment in, antenna
Structure 100 includes at least：One earth element (Ground Element), 110, one first irradiation unit (Radiation Element)
120th, one second irradiation unit 130, one first feeding portion (Feeding Element) 140, and one second feeding portion 150.It is foregoing
Earth element 110, the first irradiation unit 120, the second irradiation unit 130, the first feeding portion 140 and the second feeding portion 150 can be by
Metallic plate (Metal Plate) or sheet metal (Metal Piece) are made.
Antenna structure 100 has a central shaft (Central Axis) LC1, it passes through earth element 110, the first irradiation unit
120 and second irradiation unit 130 each central point.For example, a square can be substantially presented in earth element 110, the
One first circle can be substantially presented in one irradiation unit 120, and one second circle can be substantially presented in the second irradiation unit 130, wherein
Foregoing second circular area can be slightly less than the foregoing first circular area.Specifically, if the first irradiation unit 120 is in ground connection member
There is one first upright projection (Vertical Projection) on part 110 and the second irradiation unit 130 is on earth element 110
With one second upright projection, then the second upright projection will be fully located at the inside of the first upright projection, and the first upright projection
A concentric circles (Concentric Circles) will be presented in combination with the second upright projection.It must be noted that this practicality is new
Type is not limited to that.In other embodiments, earth element 110, the first irradiation unit 120 and the second irradiation unit 130 also may be used
Each there are other symmetric shapes, such as：One equilateral triangle, a diamond shape, a regular hexagon, or an octagon.
First irradiation unit 120 has one first perforate (Opening) 121 and one second perforate 122.For example, the first perforate
121 and second perforate 122 can be round hole or square perforate, but be not limited only to this.Second irradiation unit 130 and the first spoke
Penetrate portion 120 to be kept completely separate and be floating (Floating), wherein the first irradiation unit 120 is between the second irradiation unit 130 and connects
Between ground element 110.Second irradiation unit 130 can be used for partly reflection, electromagnetic wave of the partial penetration from the first irradiation unit 120
(Electromagnetic Wave), so as to improve gain (Gain) and the bandwidth (Bandwidth) of antenna structure 100.
First feeding portion 140 includes one first coupling excitation portion (Coupling Excitation Element) 141 and one
First connecting portion (Connection Element) 142, wherein one first signal source 191 is coupled to via first connecting portion 142
First coupling excitation portion 141.Specifically, first connecting portion 142 passes through the first perforate 121 of the first irradiation unit 120, the first coupling
Excitation portion 141 is closed to be adjacent to the first irradiation unit 120 but separate with the first irradiation unit 120, and the first coupling excitation portion 141 is between the
Between two irradiation units 130 and the first irradiation unit 120.Second feeding portion 150 includes one second coupling excitation portion 151 and one second and connects
Socket part 152, wherein a secondary signal source 192 is coupled to the second coupling excitation portion 151 via second connecting portion 152.Specifically,
Second connecting portion 152 passes through the second perforate 122 of the first irradiation unit 120, and the second coupling excitation portion 151 is adjacent to the first irradiation unit
120 but separated with the first irradiation unit 120, and the second coupling excitation portion 151 is between the second irradiation unit 130 and the first irradiation unit 120
Between.It must be noted that " neighbouring " so-called in this specification or " adjacent " word can refer to corresponding two element and be smaller than one
Both set a distance (such as：2mm or shorter).
First coupling excitation portion 141 and the second coupling excitation portion 151 can be located on same specific plane.For example, ground connection member
Part 110, the first irradiation unit 120, the second irradiation unit 130, and foregoing specific plane can be parallel each other.First coupling
One the 3rd circle can be substantially presented in excitation portion 141, and one the 4th circle can be substantially presented in the second coupling excitation portion 151, its
In foregoing 4th circular area can be substantially equal to foregoing 3rd circular area.It must be noted that the utility model not
It is only limitted to this.In other embodiments, the first coupling excitation portion 141 and the second coupling excitation portion 151 also can each have other
Symmetric shape, such as：One equilateral triangle, a diamond shape, a regular hexagon, or an octagon.First connecting portion 142 can be one
First coaxial wire (Coaxial Cable), wherein a center conductor (Central of the first coaxial wire
Conductive Line) it may be coupled to the first coupling excitation portion 141, and a conductor casing of the first coaxial wire
(Conductive Housing) may be coupled to earth element 110 but be not directly contacted with the first irradiation unit 120.Second connecting portion
152 can be one second coaxial wire, wherein a center conductor of the second coaxial wire may be coupled to the second coupling excitation portion
151, and a conductor casing of the second coaxial wire may be coupled to earth element 110 but be not directly contacted with the first irradiation unit 120.
First signal source 191 and secondary signal source 192 can be used for producing the identical FD feed of operating frequency, with excitation antenna structure
100 and reach dual-polarized characteristic.
In certain embodiments, antenna structure 100 further includes a support column (Supporting Pillar) 160, wherein propping up
Dagger 160 is connected to earth element 110, and is used to support the first irradiation unit 120.For example, support column 160 can use metal or non-gold
Belong to material to be made, and can align with the central axis L C1 of antenna structure 100.It is to be understood that support column 160 belongs to selection
(Optional) element, also can be removed in other embodiments.
In terms of Principle of Antenna, by the first feeding portion 140 and the second feeding portion 150 is used at the same time, double couplings can be formed
The dual-polarized antenna structure (Dual-Coupling-Fed and Dual-Polarized Antenna Structure) of feed-in
100.Must be noted that due to the first coupling excitation portion 141 and the second coupling excitation portion 151 each with the first irradiation unit 120
Between produce an equivalent feed-in capacitor (Effective Feeding Capacitor), the bandwidth of antenna structure 100 can be big
Width increase.Furthermore the mechanism that such a double-fed enters can also improve the cross polarization isolation (Cross- of antenna structure 100
Polarization Isolation, XPI).On the other hand, by the coupling of connection first excitation portion 141 a central point 145 to
The central axis L C1 of antenna structure 100 can form one first line segment (Line Segment) 171, and (the first line segment 171 is perpendicular to center
Axis LC1), and can be formed by the central axis L C1 of a central point 155 to the antenna structure 100 in the coupling excitation of connection second portion 151
One second line segment 172 (second line segment 172 is perpendicular to central axis L C1), wherein the length and second line segment 172 of the first line segment 171
Length be equal to each other, and the angle theta 1 between the first line segment 171 and second line segment 172 be more than 90 degree.Aforementioned angular scope
The impedance matching (Impedance Matching) of antenna structure 100 can be further finely tuned, refer to the reality of figure 1 below D, Fig. 1 E
Example is applied to understand.Must be noted that the first foregoing line segment 171 and second line segment 172 all to auxiliary definition angle, 2 points
Between the virtual line segment that is used of length, rather than solid element.
Fig. 1 D show the S parameter (S Parameter) of the antenna structure 100 according to one embodiment of the utility model
Figure, wherein transverse axis represents operating frequency (MHz), and the longitudinal axis represents S parameter (dB).First signal source 191 is set as a first end
Mouth (Port 1), and secondary signal source 192 is set as a second port (Port 2).In the embodiment of Fig. 1 D, the first line segment
Angle theta 1 between 171 and second line segment 172 is just equal to 98 degree (that is, more than 90 degree).According to S11 the and S22 parameters of Fig. 1 D
Understand, when antenna structure 100 is by the first signal source 191 and the feed-in at the same time of the institute of secondary signal source 192, antenna structure 100 can be contained
Cover between 2234MHz to the operational frequency bands FB1 between 3150MHz, and the bandwidth of antenna structure 100 is up to 34%.Therefore, day
Cable architecture 100 will can at least support the broadband operation of LTE (Long Term Evolution) Band40/Band41.In addition, root
Understood according to S21 (or S12) parameter of Fig. 1 D, at a center frequency of operation of aforementioned operation frequency band FB1 (such as：2692MHz),
Isolation (Isolation) (that is, absolute value of S21 parameters) between first signal source 191 and secondary signal source 192 is reachable
30dB or higher, this can meet the practical application request of general mobile communications device.
Fig. 1 E show the S parameter figure of the antenna structure 100 with 90 degree of angle thetas 1.According to S21 (or S12) parameter of Fig. 1 E
Understand, if the angle theta 1 between the first line segment 171 and second line segment 172 is reduced into 90 degree (that is, no more than 90 degree), then first
Optimal isolation degree between signal source 191 and secondary signal source 192 will be deviated toward low frequency direction, and will not be with its center operations
Frequency is overlapping.Specifically, at the center frequency of operation of aforementioned operation frequency band FB1, the first signal source 191 and secondary signal source
Isolation between 192 will be reduced to 23dB.Comparing Fig. 1 D, Fig. 1 E can find, by the first line segment 171 and second line segment 172 it
Between angle theta 1 be set greater than 90 degree of isolation characteristics for helping to greatly improve antenna structure 100.
In certain embodiments, the component size of antenna structure 100 can be as what follows.The square of earth element 110
The each length of side L1 center frequency of operation that can be generally between antenna structure 100 1.3 to 1.4 times of wavelength between (1.3 λ~1.4
λ), such as：1.35 times of wavelength (1.35 λ).First circular radius R1 of the first irradiation unit 120 can be greater than or equal to antenna structure
0.25 times of wavelength (0.25 λ) of 100 center frequency of operation.Second circular radius R2 of the second irradiation unit 130 be smaller than or
Equal to 0.25 times of wavelength (0.25 λ) of the center frequency of operation of antenna structure 100.The 3rd of first coupling excitation portion 141 is circular
Radius R3 can be between 0.01 to 0.05 times of wavelength of the center frequency of operation of antenna structure 100 (0.01 λ~0.05 λ).
The 4th circular radius R4 in the second coupling excitation portion 151 can between the center frequency of operation of antenna structure 100 0.01 to
Between 0.05 times of wavelength (0.01 λ~0.05 λ).The length of first line segment 171 and the length of second line segment 172 can be smaller than or wait
In 0.125 times of wavelength (0.125 λ) of the center frequency of operation of antenna structure 100.Second irradiation unit 130 and the first irradiation unit 120
Space D 1 can be between 0.003 to 0.1 times of wavelength of the center frequency of operation of antenna structure 100 (0.003 λ~0.1 λ).
The space D 2 of first irradiation unit 120 and earth element 110 can be between the 0.003 to 0.1 of the center frequency of operation of antenna structure 100
Between times wavelength (0.003 λ~0.1 λ).First coupling excitation portion 141 (or second coupling excitation portion 151) and the second irradiation unit
130 space D 11, with the first spacing for coupling excitation portion 141 (or second coupling excitation portion 151) and the first irradiation unit 120
D12, both ratio (D11/D12) can between 2 times to 3 times, such as：2.56 again.Dimensions above scope is according to multiple real
Test result and draw, it contributes to the operational frequency bands, the isolation that optimize antenna structure 100, and impedance matching.
Fig. 2A shows the stereogram of the antenna structure 200 according to one embodiment of the utility model.Fig. 2 B show basis
The top view of antenna structure 200 described in one embodiment of the utility model.Fig. 2 C are shown according to one embodiment institute of the utility model
The side view for the antenna structure 200 stated.Please also refer to Fig. 2A, Fig. 2 B, Fig. 2 C.Antenna structure 200 can be applied to communication dress
Put, such as：One wireless network base station.Fig. 2A, Fig. 2 B, Fig. 2 C embodiment in, antenna structure 200 includes at least：One ground connection
Element 210, one first irradiation unit 220, one second irradiation unit 230, one first feeding portion 240 and one second feeding portion 250.Before
Earth element 210, the first irradiation unit 220, the second irradiation unit 230, the first feeding portion 240 and the second feeding portion 250 stated can
As made by metallic plate or sheet metal.
Antenna structure 200 has a central axis L C2, it passes through earth element 210, the first irradiation unit 220 and the second spoke
Penetrate the central point of each in portion 230.For example, a square can be substantially presented in earth element 210, the first irradiation unit 220 can
It is circular to be substantially presented one first, and one second circle can be substantially presented in the second irradiation unit 230, wherein foregoing second is circular
Area can be slightly less than the foregoing first circular area.Specifically, if the first irradiation unit 220 has one on earth element 210
First upright projection and the second irradiation unit 230 has one second upright projection on earth element 210, then the second upright projection will
The inside of the first upright projection is fully located at, and a concentric circles will be presented in the combination of the first upright projection and the second upright projection.
It must be noted that the utility model is not limited to that.In other embodiments, earth element 210, the first irradiation unit 220
And second irradiation unit 230 also can each have other symmetric shapes, such as：One equilateral triangle, a diamond shape, a regular hexagon,
An or octagon.
First irradiation unit 220 does not have any perforate.Second irradiation unit 230 is kept completely separate with the first irradiation unit 220 and is
Floating, wherein the first irradiation unit 220 is between the second irradiation unit 230 and earth element 210.Second irradiation unit 230 can
For partly reflecting, electromagnetic wave of the partial penetration from the first irradiation unit 220, so as to improve gain and the band of antenna structure 200
It is wide.
First feeding portion 240 includes one first coupling excitation portion 241 and a first connecting portion 242, wherein one first signal
Source 291 is coupled to the first coupling excitation portion 241 via first connecting portion 242.Specifically, the first coupling excitation portion 241 is neighbouring
Separated in the first irradiation unit 220 but with the first irradiation unit 220, and the first coupling excitation portion 241 between the first irradiation unit 220 and connects
Between ground element 210.Second feeding portion 250 includes an one second coupling excitation portion 251 and second connecting portion 252, wherein one the
Binary signal source 292 is coupled to the second coupling excitation portion 251 via second connecting portion 252.Specifically, the second coupling excitation portion
251 are adjacent to the first irradiation unit 220 but are separated with the first irradiation unit 220, and the second coupling excitation portion 251 is between the first irradiation unit
Between 220 and earth element 210.
First coupling excitation portion 241 and the second coupling excitation portion 251 can be located on same specific plane.For example, ground connection member
Part 210, the first irradiation unit 220, the second irradiation unit 230, and foregoing specific plane can be parallel each other.First coupling
One the 3rd circle can be substantially presented in excitation portion 241, and one the 4th circle can be substantially presented in the second coupling excitation portion 251, its
In foregoing 4th circular area can be substantially equal to foregoing 3rd circular area.It must be noted that the utility model not
It is only limitted to this.In other embodiments, the first coupling excitation portion 241 and the second coupling excitation portion 251 also can each have other
Symmetric shape, such as：One equilateral triangle, a diamond shape, a regular hexagon, or an octagon.First connecting portion 242 can be one
First coaxial wire, wherein a center conductor of the first coaxial wire may be coupled to the first coupling excitation portion 241, and first
One conductor casing of coaxial wire may be coupled to earth element 210.Second connecting portion 252 can be one second coaxial wire,
One center conductor of wherein the second coaxial wire may be coupled to the second coupling excitation portion 251, and the one of the second coaxial wire
Conductor casing may be coupled to earth element 210.First signal source 291 and secondary signal source 292 can be used for producing operating frequency phase
Same FD feed, with excitation antenna structure 200 and reaches dual-polarized characteristic.
In certain embodiments, antenna structure 200 further includes a support column 260, and wherein support column 260 is connected to ground connection member
Part 210, and it is used to support the first irradiation unit 220.For example, support column 260 can be made of metal or non-metallic material, and can be with day
The central axis L C2 alignment of cable architecture 200.It is to be understood that support column 260 belongs to selection element, in other embodiments also
It is removable.
In terms of Principle of Antenna, by the first feeding portion 240 and the second feeding portion 250 is used at the same time, double couplings can be formed
The dual-polarized antenna structure 200 of feed-in.It must be noted that due to the first coupling excitation portion 241 and the second coupling excitation portion 251
An equivalent feed-in capacitor is each produced between the first irradiation unit 220, the bandwidth of antenna structure 200 can be significantly increased.Again
Person, the mechanism that such a double-fed enters can also improve the cross polarization isolation of antenna structure 200.On the other hand, by connection first
The central axis L C2 of one central point 245 to the antenna structure 200 in coupling excitation portion 241 can form one first line segment, 271 (First Line
Section is 271 perpendicular to central axis L C2), and by a central point 255 in the coupling excitation of connection second portion 251 to antenna structure 200
Central axis L C2 can form a second line segment 272 (second line segment 272 is perpendicular to central axis L C2), wherein the length of the first line segment 271
The length of degree and second line segment 272 is equal to each other, and the angle theta 2 between the first line segment 271 and second line segment 272 is more than 90
Degree.Aforementioned angular scope can further finely tune the impedance matching of antenna structure 200, refer to the embodiment of figure 2 below D, Fig. 2 E
To understand.
Fig. 2 D show the S parameter figure of the antenna structure 200 according to one embodiment of the utility model, and wherein transverse axis represents
Operating frequency (MHz), and the longitudinal axis represents S parameter (dB).First signal source 291 is set as a first port (Port1), and second
Signal source 292 is set as a second port (Port 2).In the embodiment of Fig. 2 D, the first line segment 271 and second line segment 272 it
Between angle theta 2 be just equal to 94 degree (that is, more than 90 degree).According to S11 the and S22 parameters of Fig. 2 D, when antenna structure 200
During by the first signal source 291 and the feed-in at the same time of the institute of secondary signal source 292, antenna structure 200 can be covered between 2175MHz extremely
An operational frequency bands FB2 between 3034MHz, and the bandwidth of antenna structure 200 is up to 33%.Therefore, antenna structure 200 will at least
It can support the broadband operation of LTE Band40/Band41.In addition, according to S21 (or S12) parameter of Fig. 2 D, in foregoing behaviour
Make at a center frequency of operation of frequency band FB2 (such as：2604.5MHz), between the first signal source 291 and secondary signal source 292
Isolation up to 24dB or higher, this can meet the practical application request of general mobile communications device.
Fig. 2 E show the S parameter figure of the antenna structure 200 with 90 degree of angle thetas 2.According to S21 (or S12) parameter of Fig. 2 E
Understand, if the angle theta 2 between the first line segment 271 and second line segment 272 is reduced into 90 degree (that is, no more than 90 degree), then first
Optimal isolation degree between signal source 291 and secondary signal source 292 will be deviated toward low frequency direction, and will not be with its center operations
Frequency is overlapping.Specifically, at the center frequency of operation of aforementioned operation frequency band FB2, the first signal source 291 and secondary signal source
Isolation between 292 will be reduced to 20dB.Comparing Fig. 2 D, Fig. 2 E can find, by the first line segment 271 and second line segment 272 it
Between angle theta 2 be set greater than 90 degree of isolation characteristics for helping to greatly improve antenna structure 200.
In certain embodiments, the component size of antenna structure 200 can be as what follows.The square of earth element 210
The each length of side L2 center frequency of operation that can be generally between antenna structure 200 1.2 to 1.4 times of wavelength between (1.2 λ~1.4
λ), such as：1.3 times of wavelength (1.3 λ).First circular radius R5 of the first irradiation unit 220 can be greater than or equal to antenna structure
0.25 times of wavelength (0.25 λ) of 200 center frequency of operation.Second circular radius R6 of the second irradiation unit 230 be smaller than or
Equal to 0.25 times of wavelength (0.25 λ) of the center frequency of operation of antenna structure 200.The 3rd of first coupling excitation portion 241 is circular
Radius R7 can be between 0.01 to 0.05 times of wavelength of the center frequency of operation of antenna structure 200 (0.01 λ~0.05 λ).
The 4th circular radius R8 in the second coupling excitation portion 251 can between the center frequency of operation of antenna structure 200 0.01 to
Between 0.05 times of wavelength (0.01 λ~0.05 λ).The length of first line segment 271 and the length of second line segment 272 can be smaller than or wait
In 0.125 times of wavelength (0.125 λ) of the center frequency of operation of antenna structure 200.Second irradiation unit 230 and the first irradiation unit 220
Space D 3 can be between 0.003 to 0.1 times of wavelength of the center frequency of operation of antenna structure 200 (0.003 λ~0.1 λ).
The space D 4 of first irradiation unit 220 and earth element 210 can be between the 0.003 to 0.1 of the center frequency of operation of antenna structure 200
Between times wavelength (0.003 λ~0.1 λ).First coupling excitation portion 241 (or second coupling excitation portion 251) and earth element 210
Space D 42, and the first space D 41 for coupling excitation portion 241 (or second coupling excitation portion 251) and the first irradiation unit 220, two
The ratio (D42/D41) of person can between 4 times to 5 times, such as：4.19 again.Dimensions above scope is according to many experiments result
And draw, it contributes to the operational frequency bands, the isolation that optimize antenna structure 200, and impedance matching.
Fig. 3 A show the stereogram of the antenna structure 300 according to another embodiment of the utility model.Fig. 3 B show root
According to the top view of the antenna structure 300 described in another embodiment of the utility model.Fig. 3 C are shown according to another reality of the utility model
Apply the side view of the antenna structure 300 described in example.Please also refer to Fig. 3 A, Fig. 3 B, Fig. 3 C.Fig. 3 A, Fig. 3 B, Fig. 3 C and Figure 1A,
Figure 1B, Fig. 1 C are similar, and difference is therebetween, and antenna structure 300 further includes a medium substrate (Dielectric Substrate)
380, and medium substrate 380 is arranged between the first irradiation unit 120 and earth element 110.Fig. 3 D are shown according to the utility model
The S parameter figure of antenna structure 300 described in another embodiment.According to S11 the and S22 parameters of Fig. 3 D, when antenna structure 300
During by the first signal source 191 and the feed-in at the same time of the institute of secondary signal source 192, antenna structure 300 can be covered between 2100MHz extremely
An operational frequency bands FB3 between 3350MHz, and the bandwidth of antenna structure 300 is up to 45.9%.Therefore, medium substrate 380 plus
Entering contributes to the operational frequency range of further broadening antenna structure 300.Fig. 3 A, Fig. 3 B, Fig. 3 C antenna structure 300 remaining
Feature is all similar with the antenna structure 100 of Figure 1A, Figure 1B, Fig. 1 C, so two embodiments may achieve similar operating effect.
Fig. 4 A show the stereogram of the antenna structure 400 according to another embodiment of the utility model.Fig. 4 B show root
According to the top view of the antenna structure 400 described in another embodiment of the utility model.Fig. 4 C are shown according to another reality of the utility model
Apply the side view of the antenna structure 400 described in example.Please also refer to Fig. 4 A, Fig. 4 B, Fig. 4 C.Fig. 4 A, Fig. 4 B, Fig. 4 C and Fig. 2A,
Fig. 2 B, Fig. 2 C are similar, and difference is therebetween, and antenna structure 400 further includes a medium substrate 480, and medium substrate 480 is arranged at
Between first irradiation unit 220 and earth element 210.Fig. 4 D show the antenna structure according to another embodiment of the utility model
400 S parameter figure.According to S11 the and S22 parameters of Fig. 4 D, when antenna structure 400 is by the first signal source 291 and the second letter
During the feed-in at the same time of the institute of number source 292, antenna structure 400 can be covered between 2050MHz to the operational frequency bands FB4 between 3350MHz,
And the bandwidth of antenna structure 400 is up to 48.1%.Therefore, the addition of medium substrate 480 contributes to further broadening antenna structure
400 operational frequency range.Fig. 4 A, Fig. 4 B, Fig. 4 C antenna structure 400 remaining feature all with Fig. 2A, Fig. 2 B, Fig. 2 C day
Cable architecture 200 is similar, so two embodiments may achieve similar operating effect.
If it is noted that add medium substrate 380 (or 480), the element ruler of aforementioned antenna structure 100 (or 200)
All " wavelength " in very little must be adjusted according to the dielectric constant (Dielectric Constant) of medium substrate 380 (or 480)
It is whole, as described in following equation (1)：
Wherein " λg" center frequency of operation of the representative antennas structure 300 (or 400) in medium substrate 380 (or 480)
Effective wavelength, the ripple of center frequency of operation of " λ " the representative antennas structure 100 (or 200) in free space (Free Space)
It is long, and " εr" represent the dielectric constant of medium substrate 380 (or 480).
The utility model provides a kind of novel antenna structure of double coupling feed-ins, it at least has broadband, dual polarization, height
It is isolation, simple in structure, and the advantage such as low manufacture cost.Therefore, the antenna structure of the utility model is well suited for being applied to each
Kind of indoor environment, to overcome tradition because communication quality is bad caused by signal reflex and multi-path decay the problem of.
It is worth noting that, above-described component size, component shape, and it is the utility model that frequency range is all non-
Restrictive condition.Antenna designers can need to adjust these setting values according to different.The antenna structure of the utility model is not
It is only limitted to the illustrated states of Figure 1A-Fig. 4 D.The utility model can only include one or more any embodiments of Figure 1A-Fig. 4 D
One or more any features.In other words, and the feature of not all diagram must be implemented on the day knot of the utility model at the same time
Among structure.
Ordinal number in this description and in the claims, such as " first ", " second ", " the 3rd " etc., each other it
Between not precedence relationship sequentially, it is only used for sign and distinguishes two different elements with same name.
Though the utility model is disclosed as above with preferred embodiment, but it is not intended to limit the scope of the utility model,
Any those of ordinary skill in the art, in the case where not departing from the spirit and scope of the utility model, be able to should do
Changing and retouching perhaps, therefore the scope of protection of the utility model should be regarded subject to appended claims institute defender.
Claims (20)
1. a kind of antenna structure, it is characterised in that the antenna structure includes：
One earth element；
One first irradiation unit, first irradiation unit have one first perforate and one second perforate；
One second irradiation unit, second irradiation unit is with first radiant section from wherein first irradiation unit is between second spoke
Penetrate between portion and the earth element；
One first feeding portion, first feeding portion include one first coupling excitation portion and a first connecting portion, wherein one first letter
Number source is coupled to the first coupling excitation portion via the first connecting portion, which passes through first perforate, and this
One coupling excitation portion is adjacent to first irradiation unit and between second irradiation unit and first irradiation unit；And
One second feeding portion, second feeding portion include one second coupling excitation portion and a second connecting portion, wherein one second letter
Number source is coupled to the second coupling excitation portion via the second connecting portion, which passes through second perforate, and this
Two coupling excitation portions are adjacent to first irradiation unit and between second irradiation unit and first irradiation unit；
Wherein a First Line is formed by a central shaft of the central point to the antenna structure that connect the first coupling excitation portion
Section, a second line segment is formed by the central shaft of the central point to the antenna structure that connect the second coupling excitation portion, and
An angle between first line segment and the second line segment is more than 90 degree.
2. antenna structure as claimed in claim 1, it is characterised in that one first circle is presented in first irradiation unit, this second
One second circle is presented in irradiation unit, and the second circular area is slightly less than the first circular area.
3. antenna structure as claimed in claim 2, it is characterised in that the first circular radius and the second circular radius
All it is substantially equal to 0.25 times of wavelength of a center frequency of operation of the antenna structure.
4. antenna structure as claimed in claim 1 a, it is characterised in that square is presented in the earth element.
5. antenna structure as claimed in claim 1, it is characterised in that one the 3rd circle is presented in the first coupling excitation portion, should
One the 4th circle is presented in second coupling excitation portion, and the 4th circular area is equal to the 3rd circular area.
6. antenna structure as claimed in claim 1, it is characterised in that the length of first line segment and the length of the second line segment
It is equal to each other.
7. antenna structure as claimed in claim 1, it is characterised in that the length of first line segment and the length of the second line segment
0.125 times of wavelength of the center frequency of operation smaller than or equal to the antenna structure.
8. antenna structure as claimed in claim 1, it is characterised in that the angle between first line segment and the second line segment
Just it is equal to 98 degree.
9. antenna structure as claimed in claim 1, it is characterised in that the antenna structure further includes：
One support column, the support column are connected to the earth element, and are used to support first irradiation unit.
10. antenna structure as claimed in claim 1, it is characterised in that the antenna structure further includes：
One medium substrate, the medium substrate are arranged between first irradiation unit and the earth element.
11. a kind of antenna structure, it is characterised in that the antenna structure includes：
One earth element；
One first irradiation unit；
One second irradiation unit, second irradiation unit is with first radiant section from wherein first irradiation unit is between second spoke
Penetrate between portion and the earth element；
One first feeding portion, first feeding portion include one first coupling excitation portion and a first connecting portion, wherein one first letter
Number source is coupled to the first coupling excitation portion via the first connecting portion, and the first coupling excitation portion is adjacent to first radiation
Portion and between first irradiation unit and the earth element；And
One second feeding portion, second feeding portion include one second coupling excitation portion and a second connecting portion, wherein one second letter
Number source is coupled to the second coupling excitation portion via the second connecting portion, and the second coupling excitation portion is adjacent to first radiation
Portion and between first irradiation unit and the earth element；
Wherein a First Line is formed by a central shaft of the central point to the antenna structure that connect the first coupling excitation portion
Section, a second line segment is formed by the central shaft of the central point to the antenna structure that connect the second coupling excitation portion, and
An angle between first line segment and the second line segment is more than 90 degree.
12. antenna structure as claimed in claim 11, it is characterised in that first irradiation unit presents one first circular, this
One second circle is presented in two irradiation units, and the second circular area is slightly less than the first circular area.
13. antenna structure as claimed in claim 12, it is characterised in that the first circular radius and this second circular half
Footpath is all substantially equal to 0.25 times of wavelength of a center frequency of operation of the antenna structure.
14. antenna structure as claimed in claim 11 a, it is characterised in that square is presented in the earth element.
15. antenna structure as claimed in claim 11, it is characterised in that one the 3rd circle is presented in the first coupling excitation portion,
One the 4th circle is presented in the second coupling excitation portion, and the 4th circular area is equal to the 3rd circular area.
16. antenna structure as claimed in claim 11, it is characterised in that the length of first line segment and the length of the second line segment
Degree is equal to each other.
17. antenna structure as claimed in claim 11, it is characterised in that the length of first line segment and the length of the second line segment
0.125 times of wavelength of a center frequency of operation of the degree smaller than or equal to the antenna structure.
18. antenna structure as claimed in claim 11, it is characterised in that the folder between first line segment and the second line segment
Angle is just equal to 94 degree.
19. antenna structure as claimed in claim 11, it is characterised in that the antenna structure further includes：
One support column, the support column are connected to the earth element, and are used to support first irradiation unit.
20. antenna structure as claimed in claim 11, it is characterised in that the antenna structure further includes：
One medium substrate, the medium substrate are arranged between first irradiation unit and the earth element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721215066.8U CN207250703U (en) | 2017-09-20 | 2017-09-20 | Antenna structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721215066.8U CN207250703U (en) | 2017-09-20 | 2017-09-20 | Antenna structure |
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| Publication Number | Publication Date |
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| CN207250703U true CN207250703U (en) | 2018-04-17 |
Family
ID=61886285
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| CN201721215066.8U Active CN207250703U (en) | 2017-09-20 | 2017-09-20 | Antenna structure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109755738A (en) * | 2019-03-08 | 2019-05-14 | 电连技术股份有限公司 | A kind of polarized grid antenna |
| CN110600864A (en) * | 2018-06-12 | 2019-12-20 | 启碁科技股份有限公司 | Antenna structure |
| CN111934086A (en) * | 2019-05-13 | 2020-11-13 | 启碁科技股份有限公司 | Antenna structure |
-
2017
- 2017-09-20 CN CN201721215066.8U patent/CN207250703U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110600864A (en) * | 2018-06-12 | 2019-12-20 | 启碁科技股份有限公司 | Antenna structure |
| CN110600864B (en) * | 2018-06-12 | 2021-03-16 | 启碁科技股份有限公司 | Antenna structure |
| CN109755738A (en) * | 2019-03-08 | 2019-05-14 | 电连技术股份有限公司 | A kind of polarized grid antenna |
| CN111934086A (en) * | 2019-05-13 | 2020-11-13 | 启碁科技股份有限公司 | Antenna structure |
| CN111934086B (en) * | 2019-05-13 | 2022-11-22 | 启碁科技股份有限公司 | Antenna structure |
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