CN208299028U - A kind of dual-frequency base station antenna array of dual polarization duplexed antenna and its composition - Google Patents
A kind of dual-frequency base station antenna array of dual polarization duplexed antenna and its composition Download PDFInfo
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- CN208299028U CN208299028U CN201820769034.0U CN201820769034U CN208299028U CN 208299028 U CN208299028 U CN 208299028U CN 201820769034 U CN201820769034 U CN 201820769034U CN 208299028 U CN208299028 U CN 208299028U
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- pass filter
- balun
- dual polarization
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- medium substrate
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Abstract
The utility model discloses a kind of dual polarization duplexed antenna and its dual-frequency base station antenna arrays of composition, including top layer medium substrate, metallic reflection floor is set below top layer medium substrate, the duplexing balun for the realization diplex operation placed vertically is set between top layer medium substrate and metallic reflection floor, the duplex balun includes vertical dielectric-slab, the front printing balun feed line of the vertical dielectric-slab, the back face printing of the vertical dielectric-slab are provided with the floor of the line of rabbet joint；The balun feed line includes a low-pass filter, a high-pass filter and the microstrip feed structures as connection, wherein, the low-pass filter and the high-pass filter are located at the two sides of the line of rabbet joint, it is connected by the microstrip feed structures, top layer medium substrate upper surface is horizontally disposed with four a period of time arms, the utility model is not necessarily to additional volume, and effective radiance in good double frequency isolation and passband may be implemented in the integrated duplexing filtering characteristic of antenna itself.
Description
Technical field
The utility model relates to wireless mobile communications fields, and in particular to a kind of dual polarization duplexed antenna and its composition it is double
Frequency base-station antenna array.
Background technique
Transmission duplex is a kind of usual way in mobile communication.In a communications system, the realization of transmission duplex, it is most important
It is to solve the problems, such as interfering with each other between transceiver channel.In frequency division duplex, transceiver channel occupies different frequencies respectively, often
It cascades the mode of duplexer directly with antenna to increase the isolation between transceiver channel, reduces interference.But this mode needs
50 Ω connecting lines and corresponding matching network undoubtedly will increase the volume of system, while being lost and also will increase with cost.
To merge antenna with duplexer height, reach the target for reducing system dimension and reducing cascade loss, duplexing day
The concept of line is proposed out.For the volume of miniaturized system, existing literature is recorded by removing between antenna and duplexer
50 Ω connecting lines and corresponding matching network, and realize duplexing (double frequency) work, but since duplexer circuit still has day
The input/output port of line can not be solved by the insertion loss that duplexer introduces.Y.-J.Lee,J.-H.Tarng,S.-
J.Chung,“A filtering diplexing antenna for dual-band operation with similar
radiation patterns and low cross-polarization levels”,IEEE Antennas and
Wireless Propag.Lett.vol.16, pp.58-61,2017. propose one without any filter or resonator knot
The duplexed antenna of structure, in this design, the size of system are reduced, and the high isolation between transceiver channel is also achieved.
But the gain of antenna is lower.Also, these duplexed antennas are all single polarizations, and it is double that designed structure, which is also difficult to expand,
Polarized radiation mode.
There are mainly two types of the modes for realizing dual polarization and transmission duplex simultaneously at present.One is pairs with two different frequencies
Poliarizing antenna is separately connected corresponding filter and matching network to realize；It is another then be using a broadband dual polarized antenna
Two duplexers are connected to realize.Both modes can all increase the size and loss of system.The function fusion of duplexer is existed
It is designed in dual polarized antenna, it will solve the problems, such as the size and loss of system very well.
Utility model content
In order to overcome shortcoming and deficiency of the existing technology, the utility model provide a kind of dual polarization duplexed antenna and its
The dual-frequency base station antenna array of composition.
This antenna realizes the function of dual polarization and duplex communication in the case where any volume of no increase, increases
Benefit is higher, and Insertion Loss is smaller, and there is good polarization isolation and frequency band to be isolated, meet the basic demand of communication system.
The utility model adopts the following technical solution:
Metallic reflection is arranged in a kind of dual polarization duplexed antenna, including top layer medium substrate, the top layer medium substrate lower section
The duplexing balun for the realization diplex operation placed vertically is arranged in floor between top layer medium substrate and metallic reflection floor, described
Duplexing balun includes vertical dielectric-slab, the vertical dielectric-slab front printing balun feed line, the vertical dielectric-slab it is anti-
Print the floor for being provided with the line of rabbet joint in face；
The balun feed line includes a low-pass filter, a high-pass filter and as the microstrip-fed of connection
Structure,
Wherein, the low-pass filter and the high-pass filter are located at the two sides of the line of rabbet joint, pass through institute
State microstrip feed structures connection；
Top layer medium substrate upper surface is horizontally disposed with four a period of time arms, and+45 ° of arm of two of them a period of time are placed, in addition
Two -45 ° of a period of time arm placements, about top layer medium substrate central symmetry.
There are two the duplex baluns, and described two duplex barron structures are identical, the orthogonal nested setting of two duplex baluns,
It is separately positioned on+45 ° and -45 directions, the top on the floor of the duplexing balun in+45 ° of directions is set and is arranged in+45 °
The connection of two a period of time arms, connect with metallic reflection floor below, the floor to work in -45 ° of duplexing balun be arranged -
45 ° of two a period of time arms connection, connect with metallic reflection floor below.
The low-pass filter is connected in parallel on by least one open circuit minor matters and is constituted on the main microstrip line of low pass；
The high-pass filter is connected in parallel on by least one short-circuit minor matters to be constituted on the main microstrip line of high pass；
Microstrip feed structures as connection are made of a microstrip line and the U-shaped microstrip line being of coupled connections at its both ends.
There are four the open circuit minor matters, is located at the upper end, left side and right side of the main microstrip line of low pass；
There are four the short circuit minor matters, is connected in parallel on the main microstrip line upper end of high pass, left side and right side.
The main microstrip line of the high pass and the main microstrip line of low pass are in series by the microstrip line of multistage different in width.
The utility model further includes four input ports, and two are low pass input port, other two is high pass input
Mouthful, low pass input port is connect with low-pass filter, and high pass input mouth is connect with high-pass filter.The metallic reflection floor
And top layer medium substrate is horizontal positioned.
A kind of dual-frequency base station antenna array is made of N × M dual polarization duplexed antenna.
The utility model has the beneficial effects that
(1) filter structure and balun Combined design do not increase additional volume, integrated duplexing (the double frequency work of antenna itself
Make) filtering characteristic, solve the problems, such as the antenna bring insertion loss of traditional cascade connection type and additional size；
(2) high gain in antenna passband, directed radiation performance is good, and directional diagram is stablized, and the outer inhibitory effect of aerial band is obvious, tool
There is good frequency selective characteristic；
(3) method by duplex capability Combined design in doublet proposed can be very good to realize dual polarization spoke
It penetrates, and meets required polarization isolation and alien frequencies isolation in mobile communication；
(4) pcb board structure is used, it is easily manufactured and installed.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 (a) is the side view of Fig. 1；
Fig. 2 (b) is the top view of Fig. 1；
Fig. 3 (a) is+45 ° of balun polarized fronts in Fig. 1；
Fig. 3 (b) is+45 ° of the balun polarized back side in Fig. 1；
Fig. 3 (c) is -45 ° of balun polarized fronts in Fig. 1；
Fig. 3 (d) is -45 ° of the balun polarized back side in Fig. 1；
Fig. 4 is a kind of stickogram of 4 ports of dual polarization duplexed antenna of the utility model embodiment；
Fig. 5 is a kind of mutual isolation in 4 ports of dual polarization duplexed antenna of the utility model embodiment；
Fig. 6 is the gain diagram of the dual polarization duplexed antenna of the utility model embodiment；
Fig. 7 (a) and Fig. 7 (b) is a kind of dual polarization duplexed antenna of the utility model embodiment respectively at low frequency (2GHz)
E-plane and H-plane pattern when work；
Fig. 8 (a) and Fig. 8 (b) is a kind of dual polarization duplexed antenna of the utility model embodiment respectively in high frequency
E-plane and H-plane pattern when (2.75GHz) works.
Specific embodiment
Below with reference to examples and drawings, the utility model is described in further detail, but the reality of the utility model
It is without being limited thereto to apply mode.
Embodiment
As shown in Figure 1, Figure 2 shown in (a), Fig. 2 (b), Fig. 3 (a), Fig. 3 (b), Fig. 3 (c) and Fig. 3 (d), a kind of dual polarization duplex day
Metallic reflection floor 5, the top layer medium is arranged in the lower horizontal of line, including top layer medium substrate 2, the top layer medium substrate
Upper surface of base plate is horizontally disposed with four a period of time arms 1, and+45 ° of arm of two of them a period of time placements form+45 ° of polarized radiations；Other two
A -45 ° of a period of time arm placements, form -45 ° of polarized radiations, four a period of time arms are about top layer medium substrate central symmetry；The coordinate
Axis is as shown in Figure 1.
The realization diplex operation placed vertically is set between the top layer medium substrate and metallic reflection floor, guarantees two
The duplexing balun 6,7 of the fine isolation of frequency range, there are two duplexing baluns, and the structure of two duplexing baluns is identical, and respectively+45 °
It places and -45 ° is placed, the duplex balun includes vertical dielectric-slab, the front printing balun feed line of the vertical dielectric-slab,
The back face printing of the vertical dielectric-slab is provided with the floor 15 of the line of rabbet joint 16, the line of rabbet joint be it is vertical, be arranged along the longitudinal midline on floor.
The top that the floor of the duplexing balun in+45 ° of directions is arranged in is connect with two a period of time arms for being arranged in+45 °, under
Side is connect with metallic reflection floor, and work is connect on the floor of -45 ° of duplexing balun with two a period of time arms for being arranged in -45 °,
It is connect below with metallic reflection floor, the doublet working frequency range is wider, can cover the duplexing balun feed
Two working passbands of low-pass filter and high-pass filter in line.
There is the cross slot 3 for the duplexing balun installation fixation placed vertically at top layer dielectric-slab center.
The balun feed line includes a low-pass filter, a high-pass filter and as the microstrip-fed of connection
Structure,
Wherein, the low-pass filter and the high-pass filter are located at the two sides of the vertical line of rabbet joint, lead to
Cross the microstrip feed structures connection；
The high-pass filter is connected in parallel on by least one short-circuit minor matters 11 to be constituted on the main microstrip line 8 of a high pass, this
In embodiment there are four short-circuit minor matters, one of them is connected to the upper end of the main microstrip line of high pass, and it is micro- that another is connected to high pass master
The right side that left side with line, most latter two short-circuit minor matters are connected to the main microstrip line of high pass.The main microstrip line of high pass by multistage not
Microstrip line with width is in series, is 5 sections in the present embodiment, wherein bottom one section of characteristic impedance is 50 Ω, it is described short
Metal probe 13 is arranged in road minor matters end.
The low-pass filter is connected in parallel on the main microstrip line 10 of a low pass by least one open circuit minor matters 12 and is constituted, this reality
It applies there are four minor matters of opening a way in example, one of them is connected to the upper end of the main microstrip line of low pass, another is connected to the main micro-strip of high pass
The left side that the right side of line, most latter two open circuit minor matters are connected to the main microstrip line of high pass.The main microstrip line of low pass is different wide by multistage
The microstrip line of degree is in series, is 5 sections in the present embodiment, wherein bottom one section of characteristic impedance is 50 Ω.
The top that the floor of the duplexing balun in+45 ° of directions is arranged in is connect with two a period of time arms for being arranged in+45 °, under
Side is connect with metallic reflection floor, and work is connect on the floor of -45 ° of duplexing balun with two a period of time arms for being arranged in -45 °,
It is connect below with metallic reflection floor, the through-hole 4 passed through for coaxial line is provided on the metallic reflection floor.
It is provided on the dielectric-slab of the duplexing balun placed vertically solid for two orthogonally located duplexing balun installations
Fixed card slot 17,18.
Microstrip feed structures as connection are by a microstrip line 9 and 14 structure of U-shaped microstrip line being of coupled connections at its both ends
At.
Duplexed antenna unit shares 4 input ports, and the port two is low pass input port, and two input for high pass
Port.Wherein, the port connecting with low-pass filter in+45 ° of duplexing balun feed lines is low-band signal input terminal, with high pass
The port of filter connection is high frequency band signal input terminal, -45 ° of polarized two port connection types and+45 ° of polarization.
The highly integrated high-gain dual polarization duplexed antenna can be used for constituting dual-frequency base station antenna array.
Refering to Fig. 4, high-gain dual polarization duplexed antenna unit of the utility model based on frequency selectivity balun is specifically real
It applies example and all has good matching performance and bandpass filtering performance on two working frequency range.
Fig. 5 is illustrated to be isolated between each port of the high-gain dual polarization duplexed antenna unit based on frequency selectivity balun
Degree.
Fig. 6 illustrates the gain diagram of the high-gain dual polarization duplexed antenna unit based on frequency selectivity balun.The knot of Fig. 6
It can be seen that the gain of high-gain dual polarization duplexed antenna unit is higher in fruit figure, illustrate that differential loss is smaller, meanwhile, Antenna Operation exists
When one of frequency band, the inhibition with higher in another frequency band.
In the directional diagram of 2GHz when Fig. 7 (a)-Fig. 7 (b) is high-gain dual polarization duplexed antenna unit low frequency operation.Fig. 8
(a) in the directional diagram of 2.7GHz when-Fig. 8 (b) is the work of high-gain dual polarization duplexed antenna unit high frequency.It can in result figure
To see, the antenna pattern of two frequency ranges is all very stable, illustrates that filtering performance designed by the utility model will not influence day
Radiance in line passband.
In short, a kind of highly integrated high-gain dual polarization duplexed antenna unit of the utility model designs current practical application
Good filter effect and very low cross polarization ratio are gone out.Due to the Combined design of antenna and filter, introduced insertion
Loss is smaller, and the radiance and radiation efficiency of antenna are all fine, and wherein the average gain in passband can achieve 8dBi or so,
Cross polarization ratio can achieve 18dB, and the polarization isolation between two ports can achieve 25dB, the pole in the same frequency band
Change isolation more than 22dB.It is noted that the utility model specific embodiment solve simultaneously duplexing (two-frequency operation) and pair
The problem of polarization, while not increasing any additional volumes, there is preferable application value.
Above-described embodiment is the preferable embodiment of the utility model, but the embodiments of the present invention is not by described
The limitation of embodiment, it is made under other any spiritual essence and principles without departing from the utility model to change, modify, replacing
In generation, simplifies combination, should be equivalent substitute mode, is included within the protection scope of the utility model.
Claims (8)
1. a kind of dual polarization duplexed antenna, including top layer medium substrate, the top layer medium substrate lower section setting metallic reflection
Plate, which is characterized in that the duplexing balun placed vertically, the duplex bar are set between top layer medium substrate and metallic reflection floor
Human relations include vertical dielectric-slab, the front printing balun feed line of the vertical dielectric-slab, the back face printing of the vertical dielectric-slab
It is provided with the floor of the line of rabbet joint；
The balun feed line includes a low-pass filter, a high-pass filter and microstrip feed structures,
Wherein, the low-pass filter and the high-pass filter are located at the two sides of the line of rabbet joint, are presented by the micro-strip
Electric structure connection；
Top layer medium substrate upper surface is horizontally disposed with four a period of time arms, and+45 ° of arm of two of them a period of time are placed, other two
- 45 ° of a period of time arm placements, about top layer medium substrate central symmetry.
2. a kind of dual polarization duplexed antenna according to claim 1, which is characterized in that there are two the duplex baluns, institute
It is identical to state two duplexing barron structures, the orthogonal nested setting of two duplex baluns is separately positioned on+45 ° and -45 directions, if
It sets and is connect in the top on the floor of the duplexing balun in+45 ° of directions with two a period of time arms for being arranged in+45 °, it is anti-with metal below
Penetrate floor connection, work connect on the floor of -45 ° of duplexing balun with two a period of time arms for being arranged in -45 °, below with gold
Belong to the connection of reflection floor.
3. a kind of dual polarization duplexed antenna according to claim 2, which is characterized in that
The low-pass filter is connected in parallel on by least one open circuit minor matters and is constituted on the main microstrip line of low pass；
The high-pass filter is connected in parallel on by least one short-circuit minor matters to be constituted on the main microstrip line of high pass；
Microstrip feed structures as connection are made of a microstrip line and the U-shaped microstrip line being of coupled connections at its both ends.
4. a kind of dual polarization duplexed antenna according to claim 3, which is characterized in that there are four the open circuit minor matters, point
Not Wei Yu the main microstrip line of low pass upper end, left side and right side；
There are four the short circuit minor matters, is connected in parallel on the main microstrip line upper end of high pass, left side and right side.
5. a kind of dual polarization duplexed antenna according to claim 3, which is characterized in that the main microstrip line of the high pass and low pass
Main microstrip line is in series by the microstrip line of multistage different in width.
6. a kind of dual polarization duplexed antenna according to claim 1, which is characterized in that it further include four input ports, two
A is low pass input port, other two is high pass input mouth, and low pass input port is connect with low-pass filter, high pass input
Port is connect with high-pass filter.
7. a kind of dual polarization duplexed antenna according to claim 1, which is characterized in that the metallic reflection floor and top layer
Medium substrate is horizontal positioned.
8. it is a kind of by a kind of any one of claim 1-7 dual-frequency base station antenna array that dual polarization duplexed antenna is constituted,
It is characterized in that, is made of N × M dual polarization duplexed antenna.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820769034.0U CN208299028U (en) | 2018-05-22 | 2018-05-22 | A kind of dual-frequency base station antenna array of dual polarization duplexed antenna and its composition |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820769034.0U CN208299028U (en) | 2018-05-22 | 2018-05-22 | A kind of dual-frequency base station antenna array of dual polarization duplexed antenna and its composition |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108493602A (en) * | 2018-05-22 | 2018-09-04 | 华南理工大学 | A kind of dual-frequency base station antenna array of dual polarization duplexed antenna and its composition |
| CN112467364A (en) * | 2021-02-01 | 2021-03-09 | 华南理工大学 | Dual-frequency fusion antenna array, common mode rejection method and communication equipment |
| WO2021135567A1 (en) * | 2019-12-31 | 2021-07-08 | 华南理工大学 | Compact high-isolation dual-band dual-polarized filtering antenna |
| CN115588846A (en) * | 2022-10-26 | 2023-01-10 | 华南理工大学 | Compact dual-polarization filtering magnetoelectric dipole antenna and communication equipment |
-
2018
- 2018-05-22 CN CN201820769034.0U patent/CN208299028U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108493602A (en) * | 2018-05-22 | 2018-09-04 | 华南理工大学 | A kind of dual-frequency base station antenna array of dual polarization duplexed antenna and its composition |
| WO2019223222A1 (en) * | 2018-05-22 | 2019-11-28 | 华南理工大学 | Dual-polarized duplex antenna and dual-frequency base station antenna array formed by same |
| US11296425B2 (en) | 2018-05-22 | 2022-04-05 | South China University Of Technology | Dual-polarized duplex antenna and dual-band base station antenna array composed thereof |
| CN108493602B (en) * | 2018-05-22 | 2023-06-20 | 华南理工大学 | Dual-polarized duplex antenna and dual-frequency base station antenna array formed by same |
| WO2021135567A1 (en) * | 2019-12-31 | 2021-07-08 | 华南理工大学 | Compact high-isolation dual-band dual-polarized filtering antenna |
| CN112467364A (en) * | 2021-02-01 | 2021-03-09 | 华南理工大学 | Dual-frequency fusion antenna array, common mode rejection method and communication equipment |
| CN115588846A (en) * | 2022-10-26 | 2023-01-10 | 华南理工大学 | Compact dual-polarization filtering magnetoelectric dipole antenna and communication equipment |
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