Summary of the invention
The technical problem to be solved in the present invention is, improves the antenna technology parameter requirement such as (yield value, standing wave and multiple antennas isolation parameter); And its application, as radio reception device, MIMO communication apparatus and wireless routing device overall performance (data uplink, downstream rate and throughput etc.).Therefore, the invention provides a kind of multi-antenna component that can be applied in MIMO communication device.
A kind of multi-antenna component, comprising:
First reflecting medium surface, for reflecting described multi-antenna component uses, the radio wave of frequency in the first band limits;
At least two the first antenna elements, are all arranged at described first reflecting medium on the surface;
At least one first isolator, is arranged at described first reflecting medium on the surface and associate with its electrical couplings, mutually isolated respectively for the radio wave used by the first antenna element described in each;
Second reflecting medium surface, for reflecting described multi-antenna component uses, the radio wave of frequency in the second band limits;
At least two the second antenna elements, are all arranged at described second reflecting medium on the surface;
At least one second isolator, is arranged at described second reflecting medium on the surface and associate with its electrical couplings, mutually isolated respectively for the radio wave used by the second antenna element described in each;
Strutting piece, connects described first reflecting medium surface and the second reflecting medium surface, and is arranged at the two interval.
Further, each antenna element described comprises a medium substrate and is arranged at an antenna conductor on described medium substrate surface.
Further, described medium substrate, at 1GHz operation at frequencies, has the electrical loss tangent amount being not more than 0.0002.
Further, described antenna conductor comprises a current feed department, holding wire, transmitting station, opening coupling loop and ground plate; Described transmitting station to be arranged in described opening coupling loop and to correspond to the opening part of described opening coupling loop, described holding wire through the opening of described opening coupling loop and one end be connected with described current feed department with the integral other end that arranges of transmitting station, it is outside and face the opening of described opening coupling loop that described ground plate is positioned at described opening coupling loop.
Further, described antenna conductor comprises a current feed department, holding wire, transmitting station and closed coupled structure, the described transmitting station described closed coupled structure of electrical connection or the described closed coupled structure of coupling association.
Further, described antenna conductor comprises a current feed department, holding wire, transmitting station and closed coupled structure, described closed coupled structure has Compound Topology structure, and described holding wire is arranged along this Compound Topology structural edge described, and forms described transmitting station at end.
Further, described closed coupled structure is nested with " mountain " shape topological structure by " mouth " shape topological structure and forms this Compound Topology structure.
Further, described closed coupled structure be in a complementary split ring resonator topological structure, complementary helix topological structure, complementary folding line topological structure, complementary opening helical ring topological structure and two opening helical ring topological structure any one.
Further, the topological structure of described closed coupled structure is described complementary split ring resonator topological structure, complementary helix topological structure, complementary folding line topological structure, any one derived structure in complementary opening helical ring topological structure and two opening helical ring topological structure, or be described complementary split ring resonator topological structure, complementary helix topological structure, complementary folding line topological structure, one or more composite construction in complementary opening helical ring topological structure and two opening helical ring topological structure, or be described complementary split ring resonator topological structure, complementary helix topological structure, complementary folding line topological structure, any one group battle array structure in complementary opening helical ring topological structure and two opening helical ring topological structure.
Further, the size of entirety that described second reflecting medium surface, the second antenna element and the second isolator are formed is less than the size of the entirety that the first reflecting medium surface, the first antenna element and the first isolator are formed.
Compare existing mimo antenna, described multi-antenna component comprises two reflecting medium surfaces, reflects the radio wave of two different frequency ranges respectively; Be arranged on the first antenna element on each reflecting medium surface and the second antenna element is also separated respectively by the first isolator, the second isolator simultaneously, thus their respective radio waves are isolated mutually, make the type height number transfer rate performances such as described multi-antenna component is multiplexing based on applied wireless data transceiving control mode implementation space, space diversity, wave beam forming.Thus provide a kind of based on IEEE802.11n the wireless high-speed mobile internet device of the agreement such as e, system and subsystem antenna module.
Embodiment
Now in detail with reference to the embodiment described in accompanying drawing.In order to complete understanding the present invention, refer to numerous detail in the following detailed description.But it should be appreciated by those skilled in the art that the present invention can realize without the need to these details.In other embodiments, known method is not described in detail.Process, assembly and circuit, in order to avoid unnecessarily make embodiment fuzzy.
In order to meet the demand of user to the wireless device of the form factor of product, design dealer, providing enhancing functional while, is constantly devoted to the size of the parts reducing to use in such devices and ornamental industrial design profile.Especially providing ornamental industrial design profile product, in compact wireless device, meet required antenna performance standard is a kind of challenge.
Further, the built-in antenna of wireless mobile InterWorking Equipment changes into as a kind of market trend, is also to bring challenges in mechanism design, industrial design and Antenna Design various aspects to integration of equipments design dealer.As an example, arrange in the housing of the equipment such as wireless device such as indoor WIFI ceiling mount antenna, wireless routing device and WAP (wireless access point) (AP) and be applicable to antenna, built-in antenna layout designs also affects the layout such as mechanism assembly, pcb board and whole equipment industrial design Selection and Design in equipment.These wireless mobile InterWorking Equipments of existing market adopt externally positioned type antenna mostly, in the more fastidious situation of present consumer, especially industrial design affects very greatly consumer's purchase decision, therefore built-inization Antenna Design becomes market inner principles, is therefore considering that above-mentioned wireless mobile InterWorking Equipment is a factor considered emphatically.
Wireless mobile InterWorking Equipment built-in antenna seems especially have meaning, is described as an example in the present note, and the inner space of wireless mobile InterWorking Equipment is valuable and quite compact.The present invention is in conjunction with industrial design, mechanism design and Antenna Design various aspects wisdom, describe some compact enclosure interior layouts in detail to be conducive to built-in aerial and to play its optimum performance, to meet the requirement based on the Wireless Mobile Internet high speed interconnect communication of the agreements such as IEEE802.11n.
Referring to Fig. 1, is the perspective diagram of wireless mobile InterWorking Equipment of the present invention.Radio circuit 11, baseband signal processing unit 12, control unit 13, memory access 14, power circuit 15 and multi-antenna component 2 that wireless mobile InterWorking Equipment comprises a housing 103 and is arranged in housing 103.Wireless mobile InterWorking Equipment also comprises an electromagnetic isolation part 1, for described housing 103 inner space being divided into bilevel first inner space 102 and the second inner space 101.Described radio circuit 11, baseband signal processing unit 12, control unit 13, memory access 14 and power circuit 15 to be incorporated on a pcb board and to arrange in the second inner space 101 of described housing 103, described multi-antenna component 2 is arranged at the first inner space 102 of described housing 103, and is connected to radio circuit 11 respectively by coaxial line 105.Like this by mutually isolated by electromagnetic isolation part 1 to circuit part (comprising radio circuit 11, baseband signal processing unit 12, control unit 13, memory access 14 and power circuit 15) and multi-antenna component 2, to prevent multi-antenna component 2 by circuit part electromagnetic interference, multi-antenna component built-inization and external antenna is made to reach same performance effect.
Wireless mobile InterWorking Equipment comprises radio circuit 11, baseband signal processing unit 12, control unit 13, memory access 14 and power circuit 15.Memory access 14 can comprise one or more dissimilar memory devices, such as hard disk drive storage devices, nonvolatile storage are (such as, flash memory or other EPROM), volatile memory (such as, static or dynamic random access memory) etc.The operation of wireless mobile InterWorking Equipment is can be used at baseband signal processing unit 12.Baseband signal processing unit 12 can based on such as microprocessor and other integrated circuit be applicable to.Adopt a kind of applicable layout, the software that memory access 14 stores can be used to the software on wireless mobile InterWorking Equipment, such as GPRS agreement etc., for controlling the controlling functions etc. of radio-frequency power amplifier and other radio-frequency transceiver circuitry.
Radio circuit 11 can comprise radio frequency (RF) transceiver circuit, power amplifier circuit, low noise input amplifier, passive RF assembly, one or more antenna and other circuit for the treatment of RF wireless signal of being formed by one or more integrated circuit.Can also make to use up and send wireless signal (such as, using infrared communication).
In other embodiments, described radio circuit 11 also can comprise the transceiver circuit processing 2.4GHz and 5GHz frequency band and the 2.4GHz Bluetooth communication frequency band communicated for WiFi (IEEE802.11).Radio circuit 11 can also comprise cell phone transceiving radio frequency circuit, for the treatment of the radio communication of cellular telephone band, and the GSM frequency band of such as 850MHz, 900MHz, 1800MHz and 1900MHz and the frequency ranges of data (as an example) of 2100MHz.If needed, described radio circuit 11 can comprise the circuit for other short distance and long distance wireless link.Such as radio circuit 11 can comprise global positioning system (GPS) receiver device, radio-circuit, call circuit etc. for received RF and TV signal.In WiFi and Bluetooth link and other short range links, general use wireless signal tens or hundreds of foot scope in transmit data.In cellular phone link or other long-distance link, the general wireless signal that uses transmits data in the scope of several thousand feet or several miles.
Consulting Fig. 2, Fig. 3, is the illustraton of model of multi-antenna component one execution mode; Described multi-antenna component 2 comprises the first reflecting medium surface 9, is fixed at least one first isolator 12 and at least two first antenna elements 10 of 9 sides, the first reflecting medium surface, also comprise the second reflecting medium surface 90, be fixed at least one second isolator 120 and at least two second antenna elements 100 of 90 sides, the second reflecting medium surface, also comprise strutting piece 33, it connects first, second reflecting medium surface and will the two spaced apart certain distance.
The radio wave of frequency in the first band limits that first reflecting medium surface 9 uses for reflecting described multi-antenna component 2.Wherein, the radio wave of frequency in the first band limits used refers to the electromagnetic wave that each first antenna element 10 produces or the electromagnetic wave that each first antenna element 10 receives, the electromagnetic frequency range that the first frequency range i.e. the first antenna element 10 produces or receives.In certain embodiments, the first reflecting medium surface 9 is arranged on electromagnetic isolation part 1 on the surface, and described first reflecting medium surface 9 can adopt copper or other electric conducting material to make, and can a nonplanar surface.Be understandably, first reflecting medium surface 9 can have discrete point, as being processed into network structure or offering the dielectric surface that the mode such as porose realizes reflection wave function, wherein the size in network structure or hole is less than 1/10th of the wavelength of radio wave that described multi-antenna component uses.In the present embodiment, electromagnetic isolation part 1 is made up of metal material, and electromagnetic isolation part 1 surface that namely conductive metallic material is obtained becomes described first reflecting medium surface 9.In other embodiments, described electromagnetic isolation part 1 can select the medium substrate of two-sided copper foil covered to be processed to form, and described Copper Foil forms described first reflecting medium surface 9.
In the present embodiment, the first isolator 12 inserts the first reflecting medium surface 9 by the mode of slot and fixes with its installation.Certainly, the mounting means of the first isolator 12 also can adopt other modes, such as pin plug-in type, welding etc.Meanwhile, the position of the first isolator 12 can be fixing, also can regulate, such as, arrange many group slots on the first reflecting medium surface 9, can insert to change installation site in different slots by the first isolator 12 according to actual needs, etc.First isolator 12 associate with the first reflecting medium surface 9 electrical couplings, and with surperficial 9 short circuits of the first reflecting medium, for by mutually isolated for the radio wave of the first used respectively for each first antenna element 10 frequency range.That is, when the antenna transmits the electromagnetic wave, the first isolator 12 is also used as the reflector of each antenna element 10 simultaneously.Be understandable that, described first isolator 12 can be multiple, and is made up of copper, aluminium or other electric conducting materials.In the present invention, described first isolator 12 along with needs design of all kinds.Have three the first isolators 12 in the present embodiment, common formation three opens the arm at 120 degree of angles mutually, and the outside of each arm forms certain corner cut, so that described first reflecting medium surface 9 top solid spaces are divided into three equal parts solid space.
Consult Fig. 4, Fig. 5, each first antenna element 10 comprises a medium substrate 3 and is arranged at described medium substrate 3 skin antenna conductor.
Medium substrate 3, at 1GHz operation at frequencies, has≤nominal dielectric constant of 4.0 and the electrical loss tangent amount of≤0.0002.Described medium substrate comprises glass-fiber-fabric, epoxy resin and comprises the compound with described epoxy resin generation cross-linking reaction.Described medium substrate first kind execution mode is as follows:
Described medium substrate manufacture craft is as follows: first, provides an infiltration solution to comprise: the first component, includes epoxy resin; Second component, comprises the compound with described epoxy resin generation cross-linking reaction; And one or more solvents.Wherein the first component and the second component configure mixing according to a certain percentage.
Described infiltration solution after stirring, a described glass-fiber-fabric are infiltrated in described infiltration solution the first component and the second component are adsorbed in glass-fiber-fabric or on the surface; Then baking is copied described glass-fiber-fabric and is made one or more solvent evaporates described, and makes the first component and the mutual chemical combination of the second component be cross-linked to form prepreg or cured sheets.Prepreg refers to be copied in the relatively low environment of temperature by the glass-fiber-fabric of absorption first component and the second component in baking, and the first component comprises the soft mixture of epoxy resin and the second component inclusion compound part generation chemical combination cross-linking reaction.Solidfied material refers to be copied in the relatively high environment of temperature by the glass-fiber-fabric of absorption first component and the second component in baking, and the first component comprises the relatively hard mixture of epoxy resin and the second component inclusion compound part generation chemical combination cross-linking reaction.
In the present embodiment, the described glass-fiber-fabric infiltrated forms semi-solid preparation thing (in the form of sheets) by low-temperature bake, then described semi-solid preparation thing is cut into and cuts out sheet, needs described multi-disc to cut out sheet superimposed and carry out the multilayer dielectric substrate (i.e. multilayer laminate or sheet) that is hot pressed into described in this enforcement according to thickness.
In the particular embodiment, the compound of described second component can select the copolymer comprised by polarity macromolecule and non-polar high polymer chemical combination, as styrene maleic anhydride copolymer.Be understandable that, can all can be used for the Formulation Ingredients of present embodiment with the copolymer of epoxy resin generation chemical combination cross-linking reaction.The wherein styrene maleic anhydride copolymer of present embodiment, its molecular formula is as follows:
4 styrene are comprised in above-mentioned styrene maleic anhydride copolymer molecular formula.In other embodiments, corresponding molecular weight can be selected, as comprised 6,8 styrene or any number in styrene maleic anhydride copolymer molecular formula.Epoxy resin is the organic high molecular compound containing two or more epoxide groups in general reference molecule.
In other examples, the compound of the described second component mixture that can also select cyanate performed polymer or select styrene maleic anhydride copolymer to mix according to arbitrary proportion with cyanate performed polymer.
In the particular embodiment, described epoxy resin and styrene maleic anhydride copolymer are prepared according to the ratio of sense value, then add a certain amount of solvent solution-forming.Described epoxy resin and styrene maleic anhydride copolymer hybrid technique adopt conventional equipment to process, as normal agitation bucket and reactor make epoxy resin and styrene maleic anhydride copolymer Homogeneous phase mixing, thus make the epoxy resin in described solution and styrene maleic anhydride copolymer Homogeneous phase mixing.
In the particular embodiment, impelling gel in above-mentioned infiltration solution 200-400 time second (selecting gel ambient temperature 171 DEG C) by adding certain promoter, wherein promoting that about 260 seconds above-mentioned infiltration solution gelatinizing time (as 258-260 second or 250-270 second etc.) effect is better.Described promoter can be selected and be included but not limited to tertiary amines, any class in imidazoles and Boron Trifluoride Ethylamine or mixture between them.
One or more solvents described can select the mixed solvent including but not limited in acetone, butanone, DMF, EGME, toluene be mixed to form between any one or above-mentioned two or more solvent.
In another embodiment, described infiltration solution comprises: the first component, comprises epoxy resin; Second component, comprises the compound with described epoxy resin generation cross-linking reaction; And one or more solvents.The mixture that the compound of described second component selects styrene maleic anhydride copolymer to mix according to arbitrary proportion with cyanate performed polymer.Wherein said cyanate performed polymer concentration 75%.Promoter selects methylimidazole; Butanone selected by described solvent.Make medium substrate 3 of the present invention by above-mentioned formula and manufacturing process thereof, thus improve the radiation efficiency of antenna conductor.
As shown in Figure 4, described antenna conductor comprises a current feed department 5, holding wire 4, transmitting station 6, opening coupling loop 7 and ground plate 8.Described transmitting station 6 to be arranged in described opening coupling loop 7 and to correspond to the opening part of described opening coupling loop 7, and described holding wire 4 is through the opening of described opening coupling loop 7, and one end and the integral setting of transmitting station 6, the other end is connected with current feed department 5.Ground plate 8 to be positioned at certain intervals outside opening coupling loop 7 and to face its opening.In the present embodiment, described radio circuit 11 signal to be transmitted is sent to current feed department 5 by coaxial line 105, and described coaxial line 105 is electrically connected to current feed department 5 through the first reflecting medium surface 9.
Please also refer to Fig. 5 and 6, the floor map and the transmitting station length that are respectively the antenna element of a pin plug-in type are variable illustrative schematic plan views.In this execution mode, antenna conductor comprises a current feed department 5, holding wire 4, transmitting station 6 and closed coupled structure 7.Described closed coupled structure 7 is a complementary split ring resonator topological structure.Described transmitting station 6 is electrically connected described closed coupled structure 7 (shown in Fig. 5) or the described closed coupled structure 7 (shown in Fig. 6) of coupling association.
Please refer to Fig. 7, is the topological schematic diagram of closed coupled structure 7 of inventive antenna conductor.Different topological structures is changing length d, width w and these parameters of topological structure interval S between the lines of topological structure entirety according to simulation softwares such as CST, HFSS.The number of turns that topological structure wiring simultaneously forms helix also can adjust, and the number of turns of the helix shown in Fig. 7 is 2.By regulating above-mentioned parameter to realize design object antenna, the parameter affecting antenna conductor is optimized.In addition, the size of holding wire 4 length of antenna conductor, width, ground plate 8 is also the parametric variable of development and Design antenna, therefore above-mentioned parameter is regulated, with realize target antenna performance index according to the antenna index such as resonance band, directivity, gain of target.
In order to meet the requirement of antenna development and Design, develop difform topological structure to adapt to Antenna Design demand, please refer to difform topological structure shown in Fig. 8 to Figure 12, topological structure described in these adopts topological structure in various artificial electromagnetic material and derived structure thereof.As described in topological structure can select complementary split ring resonator topological structure (as shown in Fig. 8 a, 8b), namely as shown in Fig. 8 a, 8b, the shape of two kinds of topological structures forms complementation.This kind of design is equivalent to and adds antenna physical length (physical length size does not increase), and a day line development can be made like this to be conducive to miniaturization.
Topological structure shown in Fig. 8 a and 8b forms a pair complementary split ring resonator topological structure mutually.Wherein the topological structure shown in Fig. 8 b is split ring resonator topological structure, and Fig. 8 a is the complementary topological structure of the topological structure shown in Fig. 8 b.The opening helical ring topological structure that described topological structure also can select as illustrated in figures 9 a and 9b a pair complementary helix topological structure, a pair complementary folding line topological structure as shown in figures 10 a and 10b, as shown in figures 1 la and 1 lb a pair complementary and the complementary two opening helical ring topological structures of as shown in figures 12 a and 12b a pair.
The topological structure of closed coupled structure 7 can by a kind of or derived by several structure above, compound or organize the topological structure that battle array obtains.Derive and be divided into two kinds, one is that geometry derives, and another kind is that expansion is derivative.Geometry is herein derivative refers to that function class derives like, variform structure, such as derive open curve topological structure, open-delta topological structure, opening Polygon Topology structure and other different polygon class formation by square frame class formation, for the opening resonance metal ring structure shown in Fig. 8 a, Figure 13 derives schematic diagram for its geometry.By such as the opening resonance metal ring structure shown in Fig. 8 b, Figure 14 derives schematic diagram for its geometry.Except above-mentioned two kinds from geometrically derivative, also comprise and topological structure self extended derivative, please refer to the deriving mode of metal shown in Figure 15, extending deriving mode with the opening resonance metal ring structure shown in Fig. 8 b for carrying out self.
Above-mentioned expansion derives i.e. mutual complex superposition formation topological structure on the basis of the topological structure of Fig. 8 to Figure 12; Compound herein refers to, at least two topological structure complex superposition as shown in Fig. 8 to Figure 12 form a Compound Topology structure.Compound Topology structure be as illustrated in fig 16 a by three as shown in Figure 8 b complementary split ring resonator topological structure compound be nested to form.Thus obtain a kind of complementary Compound Topology structure (as shown in fig 16b) by topological structure as illustrated in fig 16 a.
Group battle array refers to that in above-mentioned complementary split ring resonator topological structure, complementary helix topological structure, complementary folding line topological structure, complementary opening helical ring topological structure and two opening helical ring topological structure, any one topological structure by arranging with certain pitch arrays in a plane.The topological structure of closed coupled structure 7 can be the topological structure obtained after this array.
Described antenna conductor is by laser-engraving technique and etching technique, any one is arranged on the surface of described medium substrate.
Above-mentioned to the first reflecting medium surface 9, first antenna element 10, the description of the first isolator 12, be applicable to the second reflecting medium surface 90 respectively, second antenna element 100, second isolator 120, namely they are that one_to_one corresponding is identical, just the size of the superstructure of the latter's formation is significantly less than the size of the understructure that the former is formed, thus used radio wave frequency is different, namely the second antenna element 10 electromagnetic frequency of receiving and producing is in the second band limits, and the electromagnetic wave of two different frequency ranges is separated by the second reflecting medium surface 90, thus the mutual interference effectively reduced between different frequency range electromagnetic wave.For the electromagnetic wave that the multiple antenna elements in every Rotating fields use, then separated by every layer of corresponding first isolator 12 or the second isolator 120, reduce the impact between adjacent antenna units, be conducive to improving omni-directional.
Described multi-antenna component comprises a public reflecting surface and arranges the some antenna elements of described public reflecting surface, is then mutually isolated by some antenna elements.Make the type height number transfer rate performances such as described multi-antenna component is multiplexing based on applied wireless data transceiving control mode implementation space, space diversity, wave beam forming.Thus provide a kind of based on IEEE802.11n the wireless high-speed mobile internet device of the agreement such as e, system and subsystem antenna module.
By reference to the accompanying drawings embodiments of the invention are described above; but the present invention is not limited to above-mentioned embodiment; above-mentioned embodiment is only schematic; instead of it is restrictive; those of ordinary skill in the art is under enlightenment of the present invention; do not departing under the ambit that present inventive concept and claim protect, also can make a lot of form, these all belong within protection of the present invention.