A kind of extensive mimo antenna
Technical field
The invention belongs to fields of communication technology, are related to a kind of extensive mimo antenna.
Background technique
Existing antenna is primarily present the integrated high and high problem of Material Cost, relates generally to: one, function scoreboard and calibration
The integrated height of plate, it has not been convenient to manufacture and quality control;The function scoreboard of the prior art all uses full-page design, i.e., all radiating elements
Be welded in same function scoreboard, however be inconvenient to carry out the design of automatic welding, and it is inconvenient individually detected, repair or
There is the risk that entire antenna is scrapped because of the failure of some module in replacement.Two, function scoreboard and calibration plate Material Cost
It is high;The prior art integrates function scoreboard and calibration plate, and processing is complicated, and since the inside route is intricate, is difficult
Pcb board material is accomplished that size is optimal, to influence Material Cost.
Summary of the invention
In view of the above-mentioned deficiencies in the prior art, it is an object of the present invention to a kind of extensive mimo antenna be provided, to realize conveniently
Independent detection, maintenance or the replacement of antenna submatrix and calibration network.
To achieve the goals above, the invention adopts the following technical scheme:
A kind of extensive mimo antenna, including reflecting plate, the calibration network set on reflecting plate side, and it is separate set on reflecting plate
N*M antenna submatrix of calibration network side, wherein N is the positive integer more than or equal to 1, and M is just whole more than or equal to 2
Number.
Further, the antenna submatrix includes function scoreboard and the radiating element in function scoreboard.
Further, the function scoreboard is microstrip line construction.
Further, the function scoreboard includes first medium layer, set on first medium layer close to the first of reflecting plate side
Floor, and the first line layer set on first medium layer far from reflecting plate side.
Further, the calibration network is microstrip line construction or strip lines configuration.
Further, the calibration network includes second dielectric layer, and third dielectric layer is set to second dielectric layer and leans near reflex
Second floor of plate side, the second line layer between second dielectric layer and third dielectric layer, and it is set to third medium
Third floor of the layer far from second dielectric layer side.
Further, the reflecting plate is with a thickness of 1.5mm ~ 3mm.
Further, the antenna submatrix is connect by probe with calibration network.
Further, the antenna submatrix and calibration network pass through metallic screw respectively and connect with reflecting plate, the probe
Surrounding is equipped at least one metallic screw.
Further, the antenna submatrix is equipped with the first metal of connection antenna submatrix and reflecting plate around metallic screw
Change via hole, the calibration network is equipped with the second metallization VIA of connection calibration network and reflecting plate (2) around metallic screw.
Beneficial effects of the present invention:
1, radiating element is divided into antenna submatrix by the present invention, forms modularization, and such antenna submatrix, each module of calibration network are suitable
It is processed for SMT automation technolo, to improve the consistency and reliability of production and processing;
2, simultaneously, the convenient individually detection of modular antenna submatrix, maintenance or replacement, avoid reporting because an antenna submatrix fails
Give up entire antenna the case where occur, to reduce cost;
3, in addition, being designed at least one metallic screw around probe of the invention to realize calibration network or antenna submatrix and anti-
Plate DC earthing is penetrated, the combination of probe feed and metallic screw DC earthing effectively inhibits between each prevention at radio-frequency port signal
Crosstalk makes the amplitude, phase equalization and the linearity of calibration network be guaranteed so as to improve the S parameter of each prevention at radio-frequency port,
So that radiofrequency signal good transmission between antenna module;
4, simultaneously, the combination of probe feed and metallic screw DC earthing not only guarantees antenna electric performance and reliability of structure, but also
So that structure flexible design, optimizes calibration network size design.
Detailed description of the invention
Attached drawing 1 is the overlooking structure diagram of extensive mimo antenna in one embodiment of the invention;
Attached drawing 2 is the schematic diagram of the section structure of extensive mimo antenna in one embodiment of the invention;
Attached drawing 3 is the structural schematic diagram of function scoreboard in one embodiment of the invention;
Attached drawing 4 is the partial enlargement diagram of one embodiment of the invention middle probe surrounding structure;
Attached drawing 5 is that the extensive mimo antenna experiment alignment mouth of one embodiment of the invention 4.5G is surveyed to each prevention at radio-frequency port amplitude error
Attempt;
Attached drawing 6 is that the extensive mimo antenna experiment alignment mouth of one embodiment of the invention 4.5G is surveyed to each prevention at radio-frequency port phase deviation
Attempt;
Attached drawing 7 is [A1] same polarization isolation degree test figure in the extensive mimo antenna experiment of one embodiment of the invention 4.5G;
Attached drawing 8 is each heteropolar isolation degree test of prevention at radio-frequency port in the extensive mimo antenna experiment of one embodiment of the invention 4.5G
Figure;
Attached drawing 9 is prevention at radio-frequency port standing wave test chart in the extensive mimo antenna experiment of one embodiment of the invention 4.5G.
It is identified in figure: 1- function scoreboard, 101- first line layer, 102- first medium layer, the first floor 103-, 104- first
Metallization VIA, 105- radiating element, 2- reflecting plate, 3- calibration network, the second floor 301-, 302- second dielectric layer, 303-
Second line layer, 304- third dielectric layer, 305- third floor, the second metallization VIA of 306-, 4- probe, 5- metallic screw,
6- plastic rivet.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
In the description of the present invention, it is to be understood that, term " length ", " width ", "upper", "lower", "front", "rear",
The orientation or positional relationship of the instructions such as "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside" is based on attached drawing institute
The orientation or positional relationship shown, is merely for convenience of description of the present invention and simplification of the description, rather than the dress of indication or suggestion meaning
It sets or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to limit of the invention
System.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more of the features.In the description of the present invention, the meaning of " plurality " is two or more,
Unless otherwise specifically defined.
In embodiments of the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ",
Terms such as " fixations " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral;It can be with
It is mechanical connection, is also possible to be electrically connected;It can be directly connected, two can also be can be indirectly connected through an intermediary
The interaction relationship of connection or two elements inside a element.For the ordinary skill in the art, Ke Yigen
The concrete meaning of above-mentioned term in the present invention is understood according to concrete condition.
A kind of extensive mimo antenna, including reflecting plate 2 are provided with reference to shown in attached drawing 1 and Fig. 2, in embodiment, are set to
The calibration network 3 of 2 side of reflecting plate, and the N*M antenna submatrix set on reflecting plate 2 far from 3 side of calibration network, wherein N
For the positive integer more than or equal to 1, M is the positive integer more than or equal to 2.In the present embodiment, the antenna submatrix is equipped with 4*4
A, i.e. 16 antenna submatrixs are in the column arrangement of 4 rows 4;The antenna submatrix is being fixedly installed in reflecting plate 2 just by metallic screw 5
Face;The realization antenna submatrix of metallic screw 5 is electrically connected with reflecting plate 2, to realize that antenna submatrix connects with 2 direct current of reflecting plate
Ground;In embodiment, antenna submatrix edge is also set to plastic rivet 6, for antenna submatrix to be fixed on reflecting plate 2.It is real
It applies in example, the calibration network 3 is fixedly installed in side of the reflecting plate 2 far from antenna submatrix, the calibration by metallic screw 5
Network 3 is electrically connected by metallic screw 5 with reflecting plate 2, to realize calibration network 3 and 2 DC earthing of reflecting plate;The calibration
The input port of network 3 is connected with radio frequency connecting connector (not shown).In embodiment, the antenna submatrix passes through probe 4
It is electrically connected with calibration network 3;Described 4 one end of probe is electrically connected with antenna submatrix by welding, 4 other end of probe and calibration
Network 3 passes through welding electrical connection.In embodiment, the reflecting plate 2 is equipped with the threaded hole of installation metallic screw 5.
In other embodiments, the antenna submatrix may also be arranged to the other quantities such as 1*2,2*2,2*3
It is a, and be in corresponding array arrangement;The antenna submatrix and calibration network 3 are fixed on reflecting plate 2 by metallic screw 5, institute
It states and is fixed with nut on reflecting plate 2, the nut and metallic screw 5 are cooperatively connected.
With reference to shown in attached drawing 3, in embodiment, the antenna submatrix includes function scoreboard 1 and multiple radiating elements 105, described
Antenna submatrix is electrically connected to form in function scoreboard 1 by multiple radiating elements 105, and the radiating element 105 is arranged in array;This reality
It applies in example, the radiating element 105 selects patch type radiation unit;The function scoreboard 1 is fixedly installed in instead by metallic screw 5
It penetrates on plate 2;The function scoreboard 1 is electrically connected by probe 4 with calibration network 3;It is separate that the radiating element 105 is set to function scoreboard 1
The side of reflecting plate 2.With reference to shown in attached drawing 2 and Fig. 4, in embodiment, set around the position that the function scoreboard 1 is connect with probe 4
There is a metallic screw 5, the metallic screw 5 is connected between function scoreboard 1 and reflecting plate 2;It is located at metal in the function scoreboard 1
Multiple first metallization VIAs 104 are equipped with around screw 5;One is equipped with around the position that the calibration network 3 is connect with probe 4
A metallic screw 5, the metallic screw 5 are connected between calibration network 3 and reflecting plate 2;The calibration network 3 is located at metal spiral shell
Multiple second metallization VIAs 306 are equipped with around nail 5.In embodiment, first metallization VIA 104 and the second metallization
306 circular in cross-section of via hole.
In other embodiments, around 4 link position of the function scoreboard 1 and probe it is two also settable, three,
The metallic screw 5 of four or other quantity number, the metallic screw 5 are connected between function scoreboard 1 and reflecting plate 2;It is described
Function scoreboard 1, which is located at around metallic screw 5, is equipped with multiple first metallization VIAs 104;First metallization VIA 104
It cross section can also the other shapes such as oval, rectangle, square, pentagon.
In other embodiments, around 4 link position of the calibration network 3 and probe it is two also settable, three
A, four, the metallic screw 5 of five or other quantity, the metallic screw 5 be connected to calibration network 3 and reflecting plate 2 it
Between;The calibration network 3, which is located at around metallic screw 5, is equipped with multiple second metallization VIAs 306;Second metallization
It the cross section of via hole 306 can also the other shapes such as oval, rectangle, square, pentagon.
In other embodiments, traditional die casting oscillator unit, PCB dipole also can be selected in the radiating element 105
Other radiating element forms such as unit, plastics oscillator unit;Radiating element 105 is in staggered in the antenna submatrix.
With reference to shown in attached drawing 2, in embodiment, the function scoreboard 1 is microstrip line construction;The function scoreboard 1 includes first Jie
Matter layer 102 set on first medium layer 102 close to the first floor 103 of 2 side of reflecting plate, and is set to first medium layer 102 far
First line layer 101 from 2 side of reflecting plate;First floor 103 is in contact with reflecting plate 2;The radiating element 105 with
First line layer 101 passes through welded connecting;The probe 4 is welded on the pad of first line layer 101.
With reference to shown in attached drawing 2, the calibration network 3 is strip lines configuration;The calibration network 3 includes second dielectric layer
302, third dielectric layer 304 is set to second medium set on second dielectric layer 302 close to the second floor 301 of 2 side of reflecting plate
The second line layer 303 between layer 302 and third dielectric layer 304, and third dielectric layer 304 is set to far from second dielectric layer
The third floor 305 of 302 sides.In embodiment, the second dielectric layer 302 is arranged close to reflecting plate 2;Second floor
301 are in contact with reflecting plate 2, and the third floor 305 is set to side of the calibration network 3 far from reflecting plate 2, second route
Layer 303 is located at the middle layer of calibration network 3;The probe 4 is connect with the pad solder of the second line layer 303.
In other embodiments, the calibration network 3 is microstrip line construction, and the calibration network 3 includes one layer of Jie
Matter layer, the line layer set on dielectric layer far from reflecting plate side, and set on dielectric layer close to the floor of reflecting plate side.
In embodiment, the reflecting plate 2 with a thickness of 1.5mm.In other embodiments, the thickness of the reflecting plate 2
Other thickness in the 1.5mm ~ 3mm such as 2.1mm, 2.5mm, 2.8mm, 3mm also can be selected in degree.
From the foregoing, it will be observed that of the invention be arranged to modularization, and antenna submatrix and calibration for antenna submatrix in structure
It is all releasable connection between network 3 and reflecting plate 2, so that antenna submatrix, reflecting plate 2 and the calibration each component in network 3 are applicable in
It is processed in SMT automation technolo, so that the consistency and reliability of the production and processing of each component greatly increase;Meanwhile
Individually detection, maintenance or replacement can be achieved in antenna submatrix and calibration network 3, avoids and reports due to some module goes wrong
Give up entire antenna the case where occur.
In addition, being fed between calibration network 3 and antenna submatrix of the invention by probe 4, and in antenna submatrix
It is equipped at least one metallic screw 5 with being located near the probe 4 on calibration network 3, for antenna submatrix or calibration net
The DC earthing of network 3 and reflecting plate 2.The feed of probe 4 and 5 Earth Phase of metallic screw combine, that is, ensure that antenna electric performance
And reliability of structure, and make structure flexible design, optimize the size design of calibration network 3.Meanwhile the calibration net
Network 3 and antenna submatrix are effectively inhibited and are connected with each radio frequency connector by the DC earthing near feed probes 4 of metallic screw 5
Crosstalk at the prevention at radio-frequency port connect between signal, so as to improve the S parameter of each prevention at radio-frequency port, amplitude, the phase of calibration network 3
Consistency and the linearity are also guaranteed, so that radiofrequency signal is in radio frequency connector, calibration network 3, probe 4 and antenna
Good transmission is obtained in the radio-frequency channel that submatrix is collectively formed.
It is wherein attached drawing 5 with the performance test test chart of the extensive mimo antenna of 4.5G with reference to shown in attached drawing 5 to attached drawing 9
It is calibration mouth to each prevention at radio-frequency port amplitude error test chart, illustration be calibration mouth to each maximum deviation for radiating port amplitude in figure
As a result, as can be seen from the figure antenna of the invention has the amplitude error value of good calibration mouth to each radiation port;Attached drawing 6
It is calibration mouth to each prevention at radio-frequency port phase deviation test chart, to be calibration port maximum inclined to each radiation port phase for illustration in figure
Difference, from test result it can be seen that antenna of the invention has the digital baseband input signal of good calibration mouth to each radiation port;It is attached
Fig. 7 is [A2] each prevention at radio-frequency port same polarization isolation degree test figure, it can be seen that antenna of the invention is respectively penetrated with good
Frequency port same polarization isolation;Attached drawing 8 is the heteropolar isolation degree test figure of each prevention at radio-frequency port, it can be seen that day of the invention
Line has good each heteropolar isolation of prevention at radio-frequency port;Attached drawing 9 is prevention at radio-frequency port standing wave test chart, it can be seen that this hair
Bright antenna has good prevention at radio-frequency port standing wave.
Certainly, Fig. 5 to Fig. 9 is only the performance test test chart of the extensive mimo antenna of 4.5G in one experiment of the present invention, this
Invention applies also for other frequency ranges, for example, 2.3G frequency range (2.3GHz-2.5GHz), 2.6G frequency range (2.496GHz-2.690GHz),
3.5G frequency range (3.4GHz-3.8GHz) etc., and there is good electrical property.
Embodiment described above, only more preferably one of concrete mode of the invention, those skilled in the art are at this
The usual variations and alternatives carried out within the scope of inventive technique scheme should be all included within the scope of the present invention.