CN207938817U - A kind of sub- tri-band antenna of dual polarization crossed folded dipoles - Google Patents
A kind of sub- tri-band antenna of dual polarization crossed folded dipoles Download PDFInfo
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- CN207938817U CN207938817U CN201820289834.2U CN201820289834U CN207938817U CN 207938817 U CN207938817 U CN 207938817U CN 201820289834 U CN201820289834 U CN 201820289834U CN 207938817 U CN207938817 U CN 207938817U
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Abstract
The utility model discloses a kind of sub- tri-band antennas of dual polarization crossed folded dipoles, belong to wireless communication technology field, including antenna element, and antenna element includes the big reflection substrate set gradually in order, small reflection substrate and antenna element；Antenna element includes two groups of conductor elements being mutually staggeredly arranged and among two groups of conductor elements and connects the medium of conductor element；Every group of conductor element includes the subelement of a pair of of center symmetric setting；Each subelement includes an obesity portion, an elongate portion and two thin short portion, and two thin short portion is symmetrical arranged in the both sides in fat portion and respective inner end is connect with the both sides in fat portion respectively.The utility model has three wider frequency bands, can cover mobile communication include the multibands such as 5G frequency ranges, compact-sized, excellent electrical property, the features such as being easily installed, efficient, high gain, radiation direction covers wide, is suitable for mobile communication large-scale use.
Description
Technical field
The utility model is related to a kind of antennas that can emit and receive 2G to 5G signals of communication simultaneously, in particular for moving
The antenna for base station of dynamic communication system, belongs to wireless communication technology field.
Background technology
With the 5th third-generation mobile communication technology（5G）Popularization and MIMO technology it is universal, antenna technology is proposed new
It is required that in the case where not increasing number of antennas and equipment as far as possible, allow antenna on frequency band as wide as possible or multiple frequency bands
Work is the target that industry is pursued with multiple operating modes, with good Transceiver Features.
The antenna that many countries are used for 5G systems at present is required can be in 698MHz~960 MHz, 1700MHz~2700
Good performance is all had in tri- frequency ranges of the MHz of MHz, 3300MHz~3800, but this often brings oversized, the knot of antenna
Structure is not compact enough, occupied space is big, costly, is unfavorable for the arrangement of low-and high-frequency antenna element, and seriously affects the signal of antenna
Tranception-quality cannot achieve wideband radiation characteristic and the requirement of communication bandwidth of antenna.
Chinese patent application CN201710538652.4 disclose a kind of dual polarization crossed folded dipoles sub-antenna unit and
The antenna element of antenna, this antenna includes antenna element, reflecting plate, support plate, and reflecting plate is set to before support plate, antenna
Component is set to before reflecting plate；Its antenna element includes connecting for the medium of electrical connection and positioned at medium both sides and with medium
Two to be mutually staggeredly arranged group conductor element connect, two to be mutually staggeredly arranged group conductor element of antenna element is by positioned at two groups
The media such as the pcb board among conductor element separate, and two groups of conductor elements are connected on two faces of pcb board.Every group of conductor element
Include two groups of symmetrically arranged subelements, each subelement includes a fat portion being connect with feeder line and obesity portion
Outer end connection elongate portion, non-parallel setting between elongate portion and obesity portion, between the two equipped with angle.
The inner end in the fat portion of the subelement of conductor element is connect with feeder line, and the angle between elongate portion and obesity portion can be with
The unspecified angle being set to from 15 ° to 90 °.The antenna of this structure is in transmitting 698MHz~960 MHz, 1700MHz~2700
When the signal of MHz frequency ranges, effect is ideal, but in the MHz frequency ranges of 3300MHz~3800（The new frequency ranges of 5G）Reflectance factor, every
From indexs and bad such as degree.
Utility model content
The utility model technical issues that need to address are to provide a kind of sub- tri-band antenna of dual polarization crossed folded dipoles,
It has the characteristics that three band operation broader bandwidths, compact-sized, excellent electrical property, is easily installed, in frequency, polarization, radiation
The aspect of performance such as lobe pattern and impedance matching can complete signal transmitting and receiving task with flying colors.
In order to solve the above technical problems, technical solution used by the utility model is：
A kind of sub- tri-band antenna of dual polarization crossed folded dipoles, including antenna element, antenna element include in order according to
The big reflection substrate of secondary setting, small reflection substrate, be arranged medium both sides include two it is symmetrically arranged by fat portion and with
The antenna element of the subelement of the angled elongate portion composition in fat portion, be additionally provided in the fat portion of each subelement to
Thin short portion outstanding outside fat portion.
Technical solutions of the utility model further improvement lies in that：There are two thin short portions, and symmetrical in the both sides in fat portion
Setting.
Technical solutions of the utility model further improvement lies in that：The long axis direction in thin short portion and fat minister's axis direction
Angle is more than or equal to 15 ° and is less than or equal to 90 °.
The utility model above-mentioned technical proposal further improvement lies in that：It is length that fat portion, which is with the direction of inner end to outer end,
Axis, the solid oval that two side directions are short axle, the long axis in fat portion and the lenth ratio section of short axle are more than or equal to 1 and are less than
Ellipse equal to 5.
Technical solutions of the utility model further improvement lies in that：The length direction of the length direction and obesity portion of elongate portion
Setting at a right angle.
The utility model above-mentioned technical proposal further improvement lies in that：Elongate portion becomes narrow gradually from inner end to outer end
Narrow bar.
The utility model above-mentioned technical proposal further improvement lies in that：Elongate portion and the junction in obesity portion pass through arc
Transition.
The utility model above-mentioned technical proposal further improvement lies in that：Thin short portion is arranged in the outer end in fat portion, thin short
Portion is solid oval or solid strip.
Technical solutions of the utility model further improvement lies in that：Two groups of conductor elements of medium both sides are respective symmetrical
Center, which is mutually overlapped mutually, and the fat portion of two groups of conductor elements is orthogonal makes the electromagnetic field that two groups of conductor elements generate
Polarization direction is orthogonal.
Technical solutions of the utility model further improvement lies in that：The sub three frequency range days of several dual polarization crossed folded dipoles
Line unit forms aerial array, is in vertical between the sub- tri-band antenna unit of several dual polarization crossed folded dipoles of aerial array
It is one or more into arrangement, lateral arrangement, polygonal array.
By adopting the above-described technical solution, the technological progress that the utility model obtains is：
The utility model can be widely used on GSM, 3G, 4G, 5G antenna of mobile communication base station, have compact-sized, just
In installation the features such as, three band operation broader bandwidths, the excellent electrical property of this antenna.
After the utility model increases prominent thin short portion in fat portion, antenna element can be made to have in working frequency range good
Good bandwidth characteristic, is more advantageously used for work of the antenna in high band, can take into account 698MHz~960 MHz, 1700MHz~
Ripe PCB may be used in tri- frequency ranges of the MHz of 2700 MHz, 3300MHz~3800（Printed circuit）Processing technology, easily batch
Production, high precision machining have the characteristics that bandwidth of operation is wider, excellent electrical property.
The antenna element of the utility model is a kind of unique oriented Antenna Construction Design, and antenna element includes two groups of conductors
Unit, the electromagnetic field that every group of conductor element is formed have independent polarization direction, two groups of conductor element polarization directions mutually orthogonal
It is again orthogonal with the direction of propagation simultaneously, while the reflection substrate of two pieces of different sizes is set at the rear of antenna element, by antenna part
The electromagnetic wave backward that part is sent out is reflected towards front again, and medium and small reflection substrate key reflections reinforce high frequency band signal, big anti-
Penetrate substrate key reflections low-band signal, this structure keeps antenna gain high, and radiation direction covers wide, is better than same period product.
Elongate portion, thin short portion and obesity portion, after thin short portion is set in fat portion, fat portion are equipped in the subelement of every group of conductor element
Be substantially carried out the transmission of 1700MHz~2700MHz frequency band signals, fat portion be substantially carried out after being combined with thin short portion 3300MHz~
The transmission of 3800MHz frequency band signals, both elongate portion and obesity portion combine the biography for carrying out the MHz frequency band signals of 698MHz~960
It is defeated, the transmitting-receiving of the signal frequency range of 5G requirements can not only be taken into account, while in terms of other of electrical property, such as polarization, aerial radiation wave
Valve figure and matching（Impedance）Etc. can complete signal transmitting and receiving task with flying colors.
The outer end in thin short portion's setting obesity portion, i.e., thin short portion are arranged in the outer circle of one end of the close elongate portion in obesity portion,
There are two thin short portions, and is symmetrical arranged in the both sides in fat portion, these features can be such that antenna is reached in 3300~3800MHz frequency ranges
To good impedance matching and generate required radiation lobe figure.
Fat portion is arranged to using the direction of inner end to outer end be long axis, two side directions for the solid of short axle by the utility model
Ellipse, and by the at a right angle, elongate portion by the setting of elongate portion and obesity portion be designed to become narrow gradually from inner end to outer end narrow
The junction of bar shaped, elongate portion and obesity portion can be such that each frequency band signals that antenna emits do not interfere with each other, wave by arc-shaped transition
Valve figure more complete and accurate.
Respective symmetrical center positions of the two groups of conductor elements of the utility model in medium both sides are overlapping, and two groups are led
The fat portion of body unit is orthogonal, keeps the polarization direction of the electromagnetic field of two groups of conductor elements generation orthogonal.And by fat portion
The lenth ratio section of long axis and short axle is more than or equal to 1 and the ellipse less than or equal to 5, this oval preferably solid ellipse,
Thin short portion is also configured as solid oval or solid strip, can increase the bandwidth of antenna in this way.
The sub- tri-band antenna unit of several dual polarization crossed folded dipoles is formed aerial array, antenna by the utility model
In longitudinal arrangement, laterally arrangement, polygon between the sub- tri-band antenna unit of several dual polarization crossed folded dipoles of array
It is one or more in arrangement, or even the arbitrary arrangement modes such as curve arrangement, wave arrangement can also be carried out, for example can first indulge
To arrangement, then laterally arrangement finally carries out polygonal array, polygonal array can be triangular pitch, quadrangle arrangement,
Hexagon arrangement or other more polygon arrangements etc. are fully able to meet the requirement of 360 ° omni-directional covering.
Description of the drawings
Fig. 1 is the sub- tri-band antenna unit overlooking structure diagram of the utility model dual polarization crossed folded dipoles；
Fig. 2 is the side view structure decomposition diagram of Fig. 1；
Fig. 3 is the sub- tri-band antenna unit of the utility model embodiment dual polarization crossed folded dipoles in No. 1 interface and No. 2
The S parameter of interface（Reflectance factor）Experimental data；
Fig. 4 be between the sub- tri-band antenna unit conductor element of the utility model embodiment dual polarization crossed folded dipoles every
From degree experimental data；
Fig. 5 is the sub- tri-band antenna unit of the utility model embodiment dual polarization crossed folded dipoles in 698MHz~960
Radiation lobe figure under MHz frequency range typical frequencies；
Fig. 6 be the sub- tri-band antenna unit of the utility model embodiment dual polarization crossed folded dipoles 1700MHz~
Radiation lobe figure under 2700 MHz frequency range typical frequencies；
Fig. 7 be the sub- tri-band antenna unit of the utility model embodiment dual polarization crossed folded dipoles 3300MHz~
Radiation lobe figure under 3800 MHz frequency range typical frequencies；
Fig. 8 is a kind of structural schematic diagram of the sub- tri-band antenna array of the utility model dual polarization crossed folded dipoles；
Wherein, 1, antenna element, 11, conductor element, 111, obesity portion, 112, elongate portion, 113, thin short portion, 12, medium,
2, small reflection substrate, 3, big reflection substrate.
Specific implementation mode
The utility model is described in further details with reference to embodiment：
As shown in Figure 1 and Figure 2, a kind of sub- tri-band antenna of dual polarization crossed folded dipoles, it includes at least one antenna list
Member, it is possibility to have mutiple antennas unit forms one group of antenna.Antenna element includes antenna element 1, is arranged behind antenna element 1
Small reflection substrate 2 and setting in the subsequent big reflection substrate 3 of small reflection substrate 2, antenna element 1 and small reflection substrate 2 are fixed
On big reflection substrate 3, entire antenna element is supported by big reflection substrate 3.Antenna element is mainly to 1 front of antenna element（I.e.
Along the direction that big reflection substrate 3, small reflection substrate 2, antenna element 1 advance）Emit signal.Antenna element 1 can use double
PCB printings in face make, and can also be other isolation materials in addition to PCB substrate；Can also use crimping connection, be welded to connect or
The other manners such as threaded connection fix antenna element on other media.When printing making using PCB, on two faces of PCB
It is printed with conductor element 11 respectively, the conductor element 11 on two faces is mutually staggeredly arranged, between two groups of conductor elements 11 mutually
It is not connected to, the base material of PCB（Can be the materials such as glass fibre, epoxy resin, FR-4）Form two groups of interval conductor element 11
Medium 12.Antenna element 1, small reflection substrate 2,3 three of big reflection substrate are arranged in parallel, and three center is on the same axis,
I.e. the geometric center of three intersects when looking down is overlapped in the central shaft of antenna element.The peripheral dimension of antenna element 1 is big
In the peripheral dimension of small reflection substrate 2, the peripheral dimension of the peripheral dimension of antenna element 1 and small reflection substrate 2 is both less than big anti-
Penetrate 3 peripheral dimension of substrate, that is to say, that the circumscribed circle diameter of small reflection substrate 2 is less than whole conductor elements 11 on antenna element 1
Circumscribed circle diameter, it can include that whole conductor elements 11 are most on antenna element 1 that the circumscribed circle diameter of big reflection substrate 3, which is more than,
The diameter of small circular.Due to being emitted to 1 both sides of antenna element when launching from the signal of antenna element 1, small reflection substrate 2
Behind antenna element, before the high-frequency signal that antenna element 1 is launched can be reflected into antenna element by small reflection substrate 2
Side, big reflection substrate 3 is mainly the front that the low frequency signal that antenna element 1 is launched is reflected into antenna element, through small reflection
After substrate 2 and big reflection substrate 3 reflect, the signal that antenna element 1 is launched emits to a direction, 2 He of small reflection substrate
Big reflection substrate 3 enhances the signal strength in front of antenna element jointly.Make the big reflection substrate 3 of antenna element, small reflection
Conductor material when substrate 2 and antenna element 1 can be metal（Such as copper, aluminium or silver）Or it is nonmetallic（Such as graphite is added and leads
Isoelectric substance forms composite plastics material, non-organic glass etc.）.Small reflection substrate 2 and big reflection substrate 3 can be metals（Such as copper
Or aluminium）Either metal and both nonmetallic mixing, can by adjusting small reflection substrate 2 and 3 shape of big reflection substrate with
And material distribution improves the radiation lobe diagram shape of antenna element.
Every group of conductor element 11 of antenna element 1 includes that the symmetrically arranged son of a pair of geometric center with antenna element 1 is single
Member constitutes a pair of of dipole.Each subelement includes 111, one, an obesity portion elongate portion 112, further includes thin short portion
113；Thin short portion 113 is arranged in the side in fat portion 111, and prominent to the outside in fat portion 111, and thin short portion 113 can be one
It is a, can also be multiple, the most preferred embodiment of the utility model is two.Fat portion 111 can be round, strip or ellipse
Shape, inside can be non-solid, and the most preferred embodiment of the utility model is Filled Ellipse, the length ratio of oval long axis and short axle
Value section may be greater than equal to 1 and be less than or equal to any value between 5, and the long axis inner end in oval obesity portion 111 is inside
It near the geometric center of antenna element 1, and is connect with feeder line, the outer end of oval long axis is outwardly away from antenna element 1
Geometric center, i.e. obesity portion 111 are the solid oval for short axle using the direction of inner end to outer end as long axis, two side directions.Carefully
The inner end in long portion 112 is connected to the outer end in fat portion 111, and the shape of elongate portion 112 is preferably in narrow bar and from inner end to outer
End becomes narrow gradually, and the long axis in elongate portion 112 and obesity portion 111 forms angle, and included angle is more than or equal to 15 ° and is less than or equal to
90 °, the most preferred embodiment of the utility model is 90 °, i.e., the length direction in the length direction of elongate portion 112 and obesity portion 111 at
Right angle is arranged.The connection of elongate portion 112 and 111 outer end of obesity portion is to form arc-shaped transition connection by a bit of circular arc conductor,
It is consistent that the central angle angle of circular arc conductor and the long axis in elongate portion 112 and obesity portion 111 form angle, connection elongate portion 112 with
The radian of the circular arc conductor in fat portion 111 is preferably 90 °.Thin short portion 113 is in solid oval or solid strip, thin short portion
113 are arranged in the outer end in fat portion（I.e. in the fat portion 111 of 112 one end of elongate portion）, and two are preferably provided, this practicality
The two thin short portions 113 are symmetricly set on 111 liang of fat portion by novel most preferred embodiment by symmetry axis of 111 long axis of fat portion
Side, the inner end in thin short portion 113 are connected to 111 near outer ends of fat portion, i.e., the junction in thin short portion 113 and obesity portion 111 is to fertile
The distance of 111 outer end of fat portion is less than thin short portion 113 at a distance from the junction to 111 inner end of obesity portion in obesity portion 111.Thin short portion
113 long axis direction is more than or equal to 15 ° with the angle of 111 long axis direction of obesity portion and is less than or equal to 90 °.
Two groups of 11 shapes of conductor element of antenna element 1 are the same, but two groups of 11 interlaced arrangements of conductor element, in this way may be used
So that two groups of conductor elements 11 are identical in the radiation lobe that each frequency range generates, but the polarization direction of electromagnetic field is different, and two groups are led
The angle that body unit 11 intersects is 15 °~90 °（It such as can be 15 °, 30 °, 45 °, 60 °, 75 °, 90 °）, it is preferred that staggeredly 90 °
Arrangement, i.e. the two of medium both sides group conductor element 11 are preferably orthogonal, that is to say, that respective in two groups of conductor elements 11
Symmetrical center positions, which cross one another, to be overlapped and keeps the long axis direction in the fat portion 111 of two groups of conductor elements 11 orthogonal, this
Sample can reach optimum efficiency.When staggeredly 90 ° of arrangements, one of which conductor element is rotation with the geometric center of antenna element 1
Turn to overlap with another group of conductor element after center is rotated by 90 °, two groups of conductor elements 11 can in this way produced in each frequency range
The polarization direction of raw electromagnetic field is orthogonal, keeps laser propagation effect more preferable.
For the ease of field application or experimental debugging, set between antenna element 1, small reflection substrate 2, big reflection substrate 3
It can be the article for not influencing to use or debug performance of the low dielectric losses such as foam, rubber, latex to have filler, filler.
Fig. 3 is S parameter of the present embodiment antenna element in No. 1 interface and No. 2 interfaces（Reflectance factor）Experimental data passes through
Software is fitted data, it can be seen from the figure that two groups of feeder line ends of the antenna element of the present embodiment（No. 1 interface and 2
Number interface）In B1（The MHz of 698MHz~960）、B2（The MHz of 1700MHz~2700）、B3（The MHz of 3300MHz~3800）Three
The reflectance factor of wave band is respectively less than -10dB.
Fig. 4 is the experimental data of isolation between two groups of conductor elements of the present embodiment antenna element, by software to data into
Fitting is gone, it can be seen from the figure that isolation is in B1 between two groups of conductor elements of the present embodiment（The MHz of 698MHz~960）、B2
（The MHz of 1700MHz~2700）Two wave bands are respectively less than -18dB, in B3（The MHz of 3300MHz~3800）Wave band is less than -16dB.
As shown in Fig. 5, Fig. 6, Fig. 7, the present embodiment antenna element is in 698MHz~960 MHz, 1700MHz~2700
The radiation angle of radiation lobe figure on tri- wave bands of the MHz of MHz, 3300MHz~3800 under each wave band typical frequencies is all higher than
120°。
Shown in Fig. 8 is the overlooking structure diagram of the sub- tri-band antenna array of dual polarization crossed folded dipoles（It does not show
Filler）, it is by the integrated sub- tri-band antenna array of dual polarization crossed folded dipoles made of three antenna elements, this antenna
Array can cover 360 ° of regions of level.The radiation lobe figure of Fig. 5 to the Fig. 7 obtained according to the utility model experiment is it is found that originally
The antenna element of utility model is all higher than 120 ° in the radiation lobe angle of coverage of three frequency ranges, by the antenna list of the utility model
When member composition triangular array, it will be able to meet the requirement for carrying out 360 ° omni-directional covering to the space around antenna, quadrangle
The requirement covered all around is more disclosure satisfy that when the above group battle array.When antenna element is more, several antenna elements can also be in
Longitudinal arrangement, laterally arrangement, one or more in polygonal array constitute the dual polarization crossed folded dipoles of different function
Sub- tri-band antenna array.Such as can first longitudinal arrangement, then laterally arrangement finally carries out polygonal array, polygon row
Cloth can be triangular pitch, quadrangle arrangement, hexagon arrangement or the arrangement etc. of other more polygons.
Claims (10)
1. a kind of sub- tri-band antenna of dual polarization crossed folded dipoles, including antenna element, antenna element includes in order successively
The big reflection substrate being arranged（3）, small reflection substrate（2）, be arranged in medium（12）Two to be mutually staggeredly arranged group conductor of both sides
Unit（11）The antenna element of composition（1）, each conductor element includes two symmetrically arranged by fat portion（111）With with obesity
Portion（111）Angled elongate portion（112）The subelement of composition, it is characterised in that：The fat portion of each subelement（111）
On be additionally provided with to fat portion（111）Outside thin short portion outstanding（113）.
2. a kind of sub- tri-band antenna of dual polarization crossed folded dipoles according to claim 1, it is characterised in that：Thin short portion
（113）There are two, and in fat portion（111）Both sides be symmetrical arranged.
3. a kind of sub- tri-band antenna of dual polarization crossed folded dipoles according to claim 1, it is characterised in that：Thin short portion
（113）Long axis direction and obesity portion（111）The angle of long axis direction is more than or equal to 15 ° and is less than or equal to 90 °.
4. a kind of sub- tri-band antenna of dual polarization crossed folded dipoles according to claim 3, it is characterised in that：Fat portion
（111）It is the ellipse using the direction of inner end to outer end as long axis, two side directions for short axle, fat portion（111）Long axis with it is short
The lenth ratio section of axis is more than or equal to 1 and is less than or equal to 5.
5. a kind of sub- tri-band antenna of dual polarization crossed folded dipoles according to claim 1, it is characterised in that：Elongate portion
（112）Length direction and obesity portion（111）Length direction be arranged at a right angle.
6. a kind of sub- tri-band antenna of dual polarization crossed folded dipoles according to claim 5, it is characterised in that：Elongate portion
（112）It is the narrow bar become narrow gradually from inner end to outer end.
7. a kind of sub- tri-band antenna of dual polarization crossed folded dipoles according to claim 6, it is characterised in that：Elongate portion
（112）With fat portion（111）Junction pass through arc-shaped transition.
8. according to a kind of sub- tri-band antenna of dual polarization crossed folded dipoles of claim 1~7 any one of them, feature exists
In：Thin short portion（113）It is arranged in fat portion（111）Outer end, thin short portion（113）For solid oval or solid strip.
9. a kind of sub- tri-band antenna of dual polarization crossed folded dipoles according to claim 1, it is characterised in that：Medium two
Two groups of conductor elements of side（11）Mutually overlap mutually and two groups of conductor elements in respective symmetrical center positions（11）Fat portion
（111）It is orthogonal to make two groups of conductor elements（11）The polarization direction of the electromagnetic field of generation is orthogonal.
10. a kind of sub- tri-band antenna of dual polarization crossed folded dipoles according to claim 1, it is characterised in that：It is several
A sub- tri-band antenna unit of dual polarization crossed folded dipoles forms aerial array, several dual polarizations of aerial array intersect folding
It arranges in longitudinal arrangement, laterally between folded dipole tri-band antenna unit, is in polygonal array one or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820289834.2U CN207938817U (en) | 2018-03-01 | 2018-03-01 | A kind of sub- tri-band antenna of dual polarization crossed folded dipoles |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820289834.2U CN207938817U (en) | 2018-03-01 | 2018-03-01 | A kind of sub- tri-band antenna of dual polarization crossed folded dipoles |
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| CN207938817U true CN207938817U (en) | 2018-10-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108511923A (en) * | 2018-03-01 | 2018-09-07 | 太行通信股份有限公司 | A kind of sub- tri-band antenna of dual polarization crossed folded dipoles |
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2018
- 2018-03-01 CN CN201820289834.2U patent/CN207938817U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108511923A (en) * | 2018-03-01 | 2018-09-07 | 太行通信股份有限公司 | A kind of sub- tri-band antenna of dual polarization crossed folded dipoles |
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