CN103441325B - A kind of communications antenna system - Google Patents
A kind of communications antenna system Download PDFInfo
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- CN103441325B CN103441325B CN201310356772.4A CN201310356772A CN103441325B CN 103441325 B CN103441325 B CN 103441325B CN 201310356772 A CN201310356772 A CN 201310356772A CN 103441325 B CN103441325 B CN 103441325B
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Abstract
The embodiment of the invention discloses a kind of communications antenna system, comprise multiple first antenna modules, every two adjacent the first antenna modules are connected by a second antenna floor, described first antenna modules comprises a first antenna floor, first antenna and two concave metal ditches, wherein, the polarised direction of described first antenna is parallel to ground level, described first antenna is arranged on described first antenna floor, described two concave metal ditches are arranged on the both sides on described first antenna floor respectively, wherein, described concave metal ditch is spill in the plane being parallel to ground level, the two ends of described concave metal ditch indent respectively have a flank, and the sunk part of described two concave metal ditches be all positioned at described first antenna floor is installed the first antenna plane below.By the technical scheme of the embodiment of the present invention, when not needing to increase space length between each antenna, the isolation between each antenna in communications antenna system can be improved.
Description
Technical field
The present invention relates to wireless communication field, particularly relate to a kind of communications antenna system.
Background technology
The demand realizing various radio communication by Wireless Telecom Equipments such as various mobile terminals along with people is increasing, and the data volume transmitted between Wireless Telecom Equipment and cordless communication network increases rapidly, and this just needs the channel capacity improving communications antenna system.At present, antenna system adopts multi-diversity technology usually.The array that the antenna system of multi-diversity technology is made up of multiple antenna, owing to adding the number of dual-mode antenna to realize diversity gain, under the condition not increasing spectral bandwidth and transmitting power, the signal to noise ratio of transmitting/receiving signal can be improved, thus increase the channel capacity of antenna system.
In an antenna system be made up of multiple antenna, because each antenna distance is comparatively near, the signal that each antenna sends all can be received by other antennas, produces mutually to disturb and inaccurate between the signal that each antenna will be caused like this receive and dispatch.Producing mutual coupling in order to avoid existing between interrelated and antenna between the signal that each antenna accepts, just need to make to keep enough isolations between each antenna, thus when the signal of each antenna transmission is received by other antennas, Received signal strength can be ignored.Under normal circumstances, the space length increased between antenna can improve the isolation between antenna, but because current communication equipment is all miniaturized, space shared by antenna system is restricted, space length in antenna system between each antenna is also restricted, and this just makes the isolation being difficult to realize improving each antenna in antenna system by increasing space length.
Summary of the invention
Embodiment of the present invention technical problem to be solved is, a kind of communications antenna system is provided, with solve antenna system in prior art improve the isolation between each antenna by the space length increased between each antenna and cause in antenna system, the spacing of each antenna is limited cannot improve the technical problem of the isolation between each antenna.
First aspect, embodiments provides a kind of communications antenna system, comprising: multiple first antenna modules, and every two adjacent the first antenna modules are connected by a second antenna floor;
Described first antenna modules comprises a first antenna floor, first antenna and two concave metal ditches, wherein, the polarised direction of described first antenna is parallel to ground level, described first antenna is arranged on described first antenna floor, described two concave metal ditches are arranged on the both sides on described first antenna floor respectively, wherein, described concave metal ditch is spill in the plane being parallel to ground level, the two ends of described concave metal ditch indent respectively have a flank, wherein, one end flank connects the side on described first antenna floor, other end flank connects the side on described second antenna floor, and the sunk part of described two concave metal ditches be all positioned at described first antenna floor is installed the first antenna plane below,
Described first antenna modules is used for, except described first antenna modules, the first antenna of other the first antenna modules is when feed, described feed is formed respectively the effect electric field of the first antenna of described first antenna modules in two concave metal ditches of described first antenna modules and is parallel to ground level and mutually reverse field distribution, so that mutually reverse effect electric field is cancelled out each other in two concave metal ditches of described first antenna modules.
In the first possible implementation of first aspect, described antenna system also comprises the second antenna, and described second astronomical cycle is on described second antenna floor; The polarised direction of described second antenna is perpendicular to ground level.
In the implementation that the second of first aspect is possible, described antenna system linearly type arrangement, wherein each first antenna floor and each second antenna floor all in the same plane.
In the third possible implementation of first aspect, described antenna is in closing or semi-enclosed ring-type regular polygon, and wherein each the first adjacent antenna floor is equal with the angle between the second antenna floor.
In the 4th kind of possible implementation of first aspect, in conjunction with the third possible implementation of first aspect, described regular polygon is regular hexagon, and described each length of side orthohexagonal is 59 millimeters; The sole length of concave metal ditch described in each is 59 millimeters, bottom width is 8 millimeters, the degree of depth is 28.5 millimeters in ditch.
In the 5th kind of possible implementation of first aspect, the structure on described first antenna floor is double floor, comprises the upper and lower parallel to each other, is connected between the upper and lower on described first antenna floor by metal column; Described first antenna is installed on the upper strata on described first antenna floor, and the flank of described concave metal ditch is connected to the lower floor on described first antenna floor.
In the 6th kind of possible implementation of first aspect, in conjunction with the 5th kind of possible implementation of first aspect, the structure on described second antenna floor is identical with described first antenna floor, described second astronomical cycle is on the upper strata of described second antenna, and the flank of described concave metal ditch is connected to the lower floor on described second antenna floor.
In the 7th kind of possible implementation of first aspect, the structure of described first antenna comprises two-layer stripline media, two-layer antenna medium, one deck coupling metal layer, one deck paster metal level, layer of metal feeder line layer;
Wherein, bottom in described two-layer stripline media is attached on described first antenna floor, described metal feeder layer is between described two-layer stripline media, top layer in two-layer described stripline media posts described coupling metal layer, bottom in two-layer described antenna medium is attached on described coupling metal layer, and the top layer in two-layer described antenna medium posts described paster metal level.
In the 8th kind of possible implementation of first aspect, in conjunction with the 7th kind of possible implementation of first aspect, described coupling metal layer is slot-coupled metal level.
In the 9th kind of possible implementation of first aspect, in conjunction with the 7th kind of possible implementation of first aspect, described metal feeder layer is bent coaxial feeder, and described bending angle is right angle, and described coaxial feeder realizes being electrically connected with outer conductor by coaxial feeding port.
In the tenth kind of possible implementation of first aspect, in conjunction with the 7th kind of possible implementation of first aspect, described stripline media layer edge surrounding arranges multiple metal throuth hole.
The communications antenna system that the embodiment of the present invention provides, comprises multiple first antenna modules, and every two adjacent the first antenna modules are connected by a second antenna floor, described first antenna modules comprises a first antenna floor, first antenna and two concave metal ditches, wherein, the polarised direction of described first antenna is parallel to ground level, described first antenna is arranged on described first antenna floor, described two concave metal ditches are arranged on the both sides on described first antenna floor respectively, described first antenna modules comprises a first antenna floor, first antenna and two concave metal ditches, wherein, the polarised direction of described first antenna is parallel to ground level, described first antenna is arranged on described first antenna floor, described two concave metal ditches are arranged on the both sides on described first antenna floor respectively, wherein, described concave metal ditch is spill in the plane being parallel to ground level, the two ends of described concave metal ditch indent respectively have a flank, wherein, one end flank connects the side on described first antenna floor, other end flank connects the side on described second antenna floor, and the sunk part of described two concave metal ditches be all positioned at described first antenna floor is installed the first antenna plane below, described first antenna modules is used for, except described first antenna modules, the first antenna of other the first antenna modules is when feed, described feed is formed respectively the effect electric field of the first antenna of described first antenna modules in two concave metal ditches of described first antenna modules and is parallel to ground level and mutually reverse field distribution, so that mutually reverse effect electric field is cancelled out each other in two concave metal ditches of described first antenna modules.As can be seen here, because the first antenna both sides being parallel to ground level in each polarised direction respectively have a concave metal ditch, when certain first antenna carries out feed, the reverse effect Electric Field Distribution of approximate constant amplitude all can be formed in two concave metal ditches on all the other each first antenna both sides, thus field distribution just can be cancelled out each other in the concave metal ditch of both sides, the mutual coupling of the first antenna to all the other each first antennas realizing this feed is cancelled out each other, thus just can when not needing to increase the space length between each antenna, improve the isolation between each antenna in antenna system.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, the accompanying drawing that the following describes is only some embodiments recorded in the application, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the basic block diagram of communications antenna system embodiment 1 provided by the invention;
Fig. 2 is the structure chart of an execution mode of inventive antenna system embodiment 1 middle concave metal ditch;
Fig. 3 is the schematic diagram of inventive antenna system embodiment 1 middle concave metal ditch one connected mode;
Fig. 4 is the schematic diagram of the another connected mode of inventive antenna system embodiment 1 middle concave metal ditch;
Fig. 5 is the structure chart of an execution mode of fixing up an aerial wire in inventive antenna system embodiment 1;
Fig. 6 A is the schematic shapes of a kind of antenna system in inventive antenna system embodiment 1;
Fig. 6 B is the schematic shapes of another antenna system in inventive antenna system embodiment 1;
Fig. 6 C is the schematic shapes of another antenna system in inventive antenna system embodiment 1;
Fig. 6 D is the schematic shapes of another antenna system again in inventive antenna system embodiment 1;
Fig. 7 is the structure chart of the first antenna floor one execution mode in inventive antenna system embodiment 1;
Fig. 8 is the structure chart of the first antenna one execution mode in inventive antenna system embodiment 1;
Fig. 9 A is the structure chart of coupling metal layer one execution mode in inventive antenna system embodiment 1;
Fig. 9 B is the structure chart of metal feed layer one execution mode in inventive antenna system embodiment 1;
Fig. 9 C is the structure chart of edge one execution mode of the first antenna in inventive antenna system embodiment 1;
Figure 10 is the basic block diagram of communications antenna system embodiment 2 provided by the invention;
Figure 11 is the structure chart of inventive antenna system embodiment 2 middle concave metal ditch execution mode;
Figure 12 is the structure chart of antenna floor one execution mode in inventive antenna system embodiment 2;
Figure 13 is the structure chart of antenna one execution mode in inventive antenna system embodiment 2;
Figure 14 is the structure chart of metal feeder layer one execution mode in inventive antenna system embodiment 2;
Figure 15 is the structure chart of coupling metal layer one execution mode in inventive antenna system embodiment 2;
Figure 16 is the structure chart of paster metal level one execution mode in inventive antenna system embodiment 2;
Figure 17 A is a kind of overall appearance structural representation of antenna in inventive antenna system embodiment 2;
Figure 17 B is another overall appearance structural representation of antenna in inventive antenna system embodiment 2;
The distribution schematic diagram of surrounding electric field when Figure 18 is antenna feed in inventive antenna system embodiment 2.
Embodiment
The application's scheme is understood better in order to make those skilled in the art person, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Inventor finds through research, and for communications antenna system, its antenna amount comprised is more, and channel capacity is larger.And in order to ensure the impact not producing mutually mutual coupling between each antenna, be in most cases adopt the mode of space diversity to improve the isolation between each antenna.Such as, but because communication equipment volume is more and more less, various mobile communication terminal or base station, the mode which results in by space diversity between antenna in system improves isolation and is restricted.Therefore, this adopts other diversity mode to increase the isolation between antenna with regard to needing, and makes can install more antenna in onesize antenna system.Although prior art it is also proposed the mode of some non-space diversity to improve isolation, such as between the antenna sharing an antenna floor, there is one group of gap parallel to each other, make the metal strip between the gap between antenna and gap form a filter based on parallel LC resonance circuit and isolation between antenna is provided, but its isolation improves limitation, be not sufficient to make the quantity of antenna in communications antenna system to increase, therefore, existing communications antenna system generally only has two antennas.
The main thought of the embodiment of the present invention is: connect and compose communications antenna system by multiple first antenna modules by the second antenna floor; In each first antenna modules, the first antenna that polarised direction is parallel to ground level is installed on the first antenna floor, the both sides on this first antenna floor are separately installed with two concave metal ditches, these two concave metal ditches the plane being parallel to ground level be spill and sunk part be all positioned at this first antenna floor is installed the first antenna plane below, like this, the first antenna both sides being parallel to ground level in each polarised direction just respectively have a concave metal ditch in spill in the plane being parallel to ground level.In the antenna system of this structure, when giving arbitrary first antenna feed, first antenna of feed will can form the reverse field distribution of approximate constant amplitude to the effect electric field of other the first antennas in two concave metal ditches on other the first antenna both sides, thus the effect electric field in the concave metal ditch of both sides just can cancel each other, the mutual coupling of the first antenna to other the first antennas realizing feed is cancelled, as can be seen here, each first antenna can be ignored to the mutual coupling of other the first antennas when feed, thus the isolation that improve in communications antenna system between each first antenna.And, because the mutual coupling between the first antenna that each polarised direction is parallel to ground is negligible, even if then polarised direction be parallel to ground antenna element between the very little isolation that also can not cause of space length inadequate, so just can be implemented in the quantity of antenna in increase communications antenna system limited space in.
Below in conjunction with accompanying drawing, described in detail the implementation of the antenna in the present invention in communication network by embodiment.
See Fig. 1, show the basic block diagram of the antenna embodiment 1 in communication network provided by the invention.
In the antenna system of the present embodiment, comprise multiple first antenna modules 101, every two adjacent the first antenna modules 101 are connected by a second antenna floor 102.Described first antenna modules 101 comprises a first antenna floor 103, first antenna 104 and two concave metal ditches 105, wherein, the polarised direction of described first antenna 104 is parallel to ground level, described first antenna 104 is arranged on described first antenna floor 103, described two concave metal ditches are arranged on described first both sides, antenna floor 103 respectively, wherein, described concave metal ditch 105 is spill in the plane being parallel to ground level, the two ends of described concave metal ditch 105 indent respectively have a flank, wherein, one end flank connects the side on described first antenna floor 103, other end flank connects the side on described second antenna floor 104, and the sunk part of described two concave metal ditches 105 be all positioned at described first antenna floor 103 is installed the first antenna 104 plane below.
Wherein, described first antenna modules 101 for, except described first antenna modules 101, the first antenna 104 of other the first antenna modules 101 is when feed, described feed is formed respectively the effect electric field of the first antenna 103 of described first antenna modules 101 in two concave metal ditches 105 of described first antenna modules 101 and is parallel to ground level and mutually reverse field distribution, so that mutually reverse effect electric field is cancelled out each other in two concave metal ditches 105 of described first antenna modules 101.
In the present embodiment, particularly, concave metal ditch 105 can adopt a kind of structure as shown in Figure 2, and described concave metal ditch 105 comprises the side 202 parallel with two, a bottom surface 201; First end 203 bottom two described sides 202 is connected to form spill groove structure with the both sides 204 of bottom surface 201 respectively.In addition, connection between concave metal ditch 105 and the first antenna floor 103, and the connection between concave metal ditch 105 and the second antenna floor 102, all specifically can adopt mode as shown in Figure 3, the side 301 on described first antenna floor 103 or described second antenna floor 102 is connected with the second end 302 of two side 202 indent in concave metal ditch 105 respectively; Concave metal ditch 105 described in each be positioned at described first antenna floor 103 is installed described first antenna element 104 plane below.In addition, the first both sides, antenna floor 103 connect concave metal ditch 105 is the center line symmetries about the first antenna floor 103.Furthermore, concave metal ditch 105 and the first antenna floor 103 and the second antenna floor 102 are when being connected, specifically can be as shown in Figure 4, the two ends of described concave metal ditch 105 indent respectively have a flank 401, and described first antenna floor 103 and the second antenna floor 102 are connected on the flank 401 at two ends.Particularly, the second end 302 of two sides 202 of described concave metal ditch 105 respectively has a flank 401, flank 401 described in each is equal with the angle of described side 202.Wherein, the first antenna floor 103 can be connected by screw with flank 401 with the second antenna floor 102.Certainly, also can have flank on the edge on the first antenna floor 103 and the second antenna floor 102 when connecting, the side of concave metal ditch 105 is connected on the flank on antenna floor.
It should be noted that, Fig. 1 just schematically shows the structure chart of a part in the present embodiment antenna system, wherein, schematically show the annexation between the first antenna modules 101 and the second antenna floor 102, but be understandable that, in the present embodiment can not be the connected mode on each first antenna modules 101 and the second antenna floor 102 as shown in Figure 1, not the both sides of each first antenna modules 101 will connect two the second antenna floors 102 respectively, and also namely not each concave metal ditch will connect the second antenna floor 102; Such as, the antenna system in the present embodiment can be closed circulus, and the both sides of its each first antenna modules 101 connect two the second antenna floors 102 respectively; Or antenna system also can be linear structure, only have while be connected to a second antenna floor 102 in two first antenna modules 101 at antenna system head and the tail two ends, also be, two concave metal ditches 105 at antenna system head and the tail two ends all only at one end connect the first antenna floor 103, and the other end does not connect the second antenna floor 102.
In the present embodiment, on the second antenna floor 102 for connecting the first antenna modules 101, can not fix up an aerial wire, also can fix up an aerial wire.Based on above-mentioned consideration, in the present embodiment, provide multiple different execution mode.In the first possible execution mode, the first antenna 104 that polarised direction is parallel to ground level also all can be installed on the second antenna floor 102.In the execution mode that the second is possible, on the second antenna floor 102, any antenna can not be installed, there is between the first antenna 104 making each adjacent a second antenna floor 102 do not fixed up an aerial wire.
In first two execution mode, second antenna floor 102 is installed the first antenna 103 can cause adjacent two the first antennas 103 to share a concave metal ditch, affect the field distribution that concave metal ditch is formed, the isolation between the first antenna is caused to decline, having a second antenna floor 102 do not fixed up an aerial wire between adjacent two the first antennas 103 then can make the antenna element quantity in antenna reduce, and causes the channel capacity of antenna system not high.In order to solve above-mentioned two kinds of problems connected in execution mode, in the third possible execution mode, on described second antenna floor 102, second antenna of polarised direction perpendicular to ground can be installed.Particularly, as shown in Figure 5, the described antenna system in the present embodiment also comprises the second antenna 501, and described second antenna 501 is arranged on described second antenna floor 102; The polarised direction of described second antenna 501 is perpendicular to ground level.The signal that the first antenna 103 being parallel to ground level due to polarised direction and polarised direction are transmitted mutually perpendicular to the second antenna element 501 of ground level is orthogonalized, and orthogonalized information is statistical iteration each other, therefore, mutual coupling between first antenna 103 and the second antenna 501 can be ignored, thus realize the quantity that the isolation neither affected between the first antenna 103 turn increases antenna in antenna system, improve channel capacity.
In the present embodiment, described antenna system can adopt multiple different shape to arrange.Such as, can be adopt be linear pattern arrangement; Particularly, as shown in Figure 6A, in described antenna system each first antenna floor 103 and each second antenna floor 102 all in the same plane, wherein, the first antenna floor, antenna floor 103, second 102 is all at a right angle with the side of described concave metal ditch 105.And for example, antenna system can adopt and close or semi-enclosed annular regular polygon arrangement; Particularly, each the first adjacent antenna floor 103 is equal with the angle between the second antenna floor 102, and wherein, each the first antenna floor 103 and each the second antenna floor 102 occupy described regular polygon respectively.Such as, for regular hexagon, this regular polygon can be closed regular polygon as shown in Figure 6B, and wherein, each limit of this regular polygon is occupied by a first antenna floor 103 or a second antenna floor 103.And for example, this regular polygon also can be the semiclosed regular polygon lacking some or several limit, and as shown in Fig. 6 C or Fig. 6 D, some limit of this regular polygon had not both been occupied by the first antenna floor 103 and do not occupied by the second antenna floor 102 yet.It should be noted that, if antenna system does not form a closed annular, generally also can respectively connect a concave metal ditch 105 in both sides on the antenna floor at antenna head and the tail two ends, just the indent of end points place concave metal ditch 105 has one end not need to connect antenna floor again.
In order to increase the isolation between each antenna further, in the present embodiment, additionally provide the structure of multiple possible execution mode.
See Fig. 7, show the structure on a kind of the first possible antenna floor 103 of the present embodiment, described first antenna floor 103 is double floor, comprise upper strata 701 parallel to each other and lower floor 702, described first antenna 104 is installed on the upper strata on described first antenna floor 103, and the flank of described concave metal ditch 105 is connected to the lower floor 702 on described first antenna floor 103.Wherein, the upper strata 701 on described first antenna floor can be connected by metal column 703 with lower floor 702.Be understandable that, usually, the line of centres of the first upper strata, antenna floor 701 and lower floor 702 is perpendicular to the plane at the first place, antenna floor 103.It should be noted that, second antenna floor 102 can adopt and the first identical structure in antenna floor 103, wherein, described second antenna 501 can be arranged on the upper strata of described second antenna 102, and the flank of concave metal ditch 105 can be connected to the lower floor on the second antenna floor 102.
Wherein, the first antenna floor lower floor 702, when connection concave metal ditch 105, can adopt the mode of aforementioned flank to realize.When the first antenna floor lower floor 702 is connected with the flank of concave metal ditch 105, the first upper strata 701, lower floor 702 to the first antenna floor, antenna floor can be made longer, and 701, upper strata, antenna floor need can meet the requirement of the unit that fixes up an aerial wire.
Because the similar of double floor is in resonance structure, thus make antenna element can be strapped in double floor to the energy of the radiation of antenna floor trailing flank to be formed in resonance structure, thus reduce the back lobe of antenna element, decrease each antenna element back lobe to the impact of other antenna elements, thus further increase the isolation between each antenna element.
See Fig. 8, show the structure of a kind of the first possible antenna 104 in the present embodiment, the structure of described first antenna 104 comprises two-layer stripline media, two-layer antenna medium, one deck coupling metal layer, one deck paster metal level, layer of metal feeder line layer; Wherein, bottom 801 in two-layer described stripline media is attached on described first antenna floor 103, described metal feeder layer 802 is between two-layer described stripline media, top layer 803 in two-layer described stripline media posts described coupling metal layer 804, bottom 805 in two-layer described antenna medium is attached on described coupling metal layer 804, and the top layer 806 in two-layer described antenna medium posts described paster metal level 807.Be understandable that, as the second antenna floor 102 being provided with second antenna 501 of polarised direction perpendicular to ground, then the second antenna 501 also can adopt and the identical structure of the first antenna 104, only need to adjust to the installation direction of the first antenna 104, make polarised direction vertical in ground, the second antenna can be obtained.
Furthermore, in the present embodiment, multitude of different ways can be selected improve the cross-polarization levels of the first antenna and the second antenna, thus improve the isolation between each antenna further.Wherein, cross-polarization levels improves, and orthogonality namely between two kinds of aerial signals improves, also namely the first antenna more close to horizontal polarization the second antenna more close to perpendicular polarization.
A kind of mode improving cross-polarization levels can be adopt slot-coupled metal level 901 as coupling metal layer 804, as shown in Figure 9 A.Under this mode, because the cross-polarization levels of couple feed can be higher than coaxial feed, so isolation can be improved further.
The another kind of mode improving cross-polarization levels can be adopt bent coaxial feeder 902 as described metal feeder layer 802, and described bending angle is right angle, and described coaxial feeder realizes being electrically connected with outer conductor by coaxial feeding port, as shown in Figure 9 B.The bent feeder line being right angle due to bent angle can make the coaxial feeder be connected with strip line just in time be in the place that electric field is zero, thus just improves cross-polarization levels, improves the isolation between two kinds of antennas.
Another mode improving cross-polarization levels can be adopt to arrange multiple metal throuth hole 903 in described stripline media layer edge surrounding, as shown in Figure 9 C.Under this mode, be equivalent to the outer wall of stripline media also to be changed metal envelope, thus can cross-polarization levels be improved, thus improve the isolation between two kinds of antennas.
Adopt the technical scheme of the present embodiment, due to when giving each first antenna feed, in the concave metal ditch on all the other the first antenna both sides, to be all similar to constant amplitude reverse in field distribution, thus field distribution just can be cancelled out each other to the mutual coupling of each the first antenna in the concave metal ditch of both sides, thus just when not needing to increase the space length between each antenna, the isolation between each antenna can be improved.
Below with a concrete application scenarios, describe the implementation of the antenna in cordless communication network of the present invention in detail.It should be noted that, in this application scenarios, the structure of antenna is only a kind of possible execution mode of the present invention, but embodiments of the present invention are not limited to this application scene.
See Figure 10, show the basic block diagram of communications antenna system embodiment 2 provided by the invention.In the present embodiment, antenna system is made up of 6 antenna floors 1001, in the ring-type regular hexagon closed, is connected between each antenna floor 1001 by concave metal ditch 1002, particularly, the lower edge on antenna floor 1001 is connected by screw with the flank of concave metal ditch 1002.On the upper strata on each antenna floor 1001, antenna is installed, wherein, antenna 1003,1005 and 1007 is parallel to first antenna on ground for polarised direction, antenna 1004,1006 and 1008 is second antenna of polarised direction perpendicular to ground, corresponding first antenna is arranged on the first antenna floor, and corresponding second astronomical cycle is on the second antenna floor.The structure of each antenna is identical, and polarised direction can be that the antenna that is parallel to ground by polarised direction obtains along the axis 90-degree rotation of antenna element perpendicular to the antenna on ground.In addition, in the middle of the ring-shaped inner part of whole antenna system, hexagonal metallic reflecting plate 1009 can also be increased by corresponding each antenna, the antenna element of each polarised direction perpendicular to ground can be gone out at the radiation reflective of annular internal like this, thus improve further polarised direction perpendicular to ground antenna element between isolation, and also can not affect between antenna element that polarised direction is parallel to ground and polarised direction be parallel to ground and polarised direction perpendicular to ground antenna element between isolation.In addition, in the present embodiment, orthohexagonal antenna system each limit length of side can be 59 millimeters.
It should be noted that, because the first antenna floor and the second antenna floor panel structure are identical, and be closed regular hexagon ring-type at antenna and the second antenna floor also has the second antenna, no longer distinguish the first antenna floor and the second antenna floor in the description of the present embodiment for this reason, be all referred to as with antenna floor 1001.Simultaneously, because the first antenna and the second antenna structure are also identical completely, be only that polarised direction is orthogonal, in the description of the present embodiment for this reason, also no longer distinguish the first antenna and the second antenna, all be referred to as with antenna, only distinguished by the description of polarised direction where necessary.
See Figure 11, show a kind of concave metal ditch that can adopt in the present embodiment.Wherein, the angle 1101 of flank and side is 60 degree, the thickness 1102 of framework is 1 millimeter, bottom width 1103 is 8 millimeters, flank width 1104 is 15.53 millimeters, and two Edge Distances 1105 of screw and flank are 5 millimeters, and profile height 1106 is 28.5 millimeters, screwhole diameter 1107 is 2.5 millimeters, and the length 1108 of whole concave metal ditch is 59 millimeters.Adopt the concave metal ditch 1002 of this size can realize antenna system be regular hexagon and make in this frequency band of 2.4G, to there is good isolation between each antenna.
See Figure 12, show a kind of antenna floor that can adopt in the present embodiment.Wherein, this antenna floor forms by the upper and lower are two-layer, is connected, has the identical through hole in a position in the upper and lower, antenna floor between upper strata with lower floor by middle metal column, connects feed port for coaxial line.For realizing the superperformance of antenna, the structure on antenna floor can adopt following size: the upper and lower on antenna floor all adopt the length of side 1201 to be the square of 59 millimeters, the through-hole diameter 1202 of coaxial line is 2.5 millimeters, through hole center is 14.2 millimeters to the distance 1203 of antenna floor right side edge, through hole center is 29.5 millimeters to the distance 1204 of antenna floor lower edge, the thickness 1205 of the upper and lower on antenna floor is 1 millimeter, standoff distance 1206 between two-layer is 4 millimeters, the diameter 1207 of metal column is 3 millimeters, the edge of metal column and the distance 1208 of antenna floor edge are 28 millimeters.When implementing the present embodiment, inventor finds this Double floor structure in the present embodiment, and the isolation between the antenna element of horizontal polarization can be made to improve about 10dB.
See Figure 13, show in the present embodiment the structure of a kind of antenna that can adopt.This antenna from the upper strata on antenna floor 1001 upwards, be followed successively by stripline media layer 1301, metal feeder layer 1302, stripline media layer 1303, coupling metal layer 1304, antenna medium layer 1305, antenna medium layer 1306 and paster metal level 1307, the edge surrounding of antenna is provided with multiple metal throuth hole 1308, on paster metal level, fixes each layer by metallic screw 1309.The levels that coaxial line passes floor from the inside configuration of antenna forms coaxial line feeder line port one 310.
Wherein, as shown in figure 14, the bent metal feeder at metal feeder layer can be a bent angle be right angle.In figure, the structure of metal feeder layer can adopt following size (structure with corresponding in label list diagram) to be: 1401 is 3.1 millimeters, 1402 is 18.9 millimeters, and 1403 is 43.6 millimeters, and 1404 is 43.6 millimeters, 1405 is 3.1 millimeters, 1406 is 3.1 millimeters, and 1407 is 5.35 millimeters, and 1408 is 20.25 millimeters, 1409 is 6 millimeters, 1410 is 8.8 millimeters, and 1411 is 2.35 millimeters, and 1412 is 3.1 millimeters.Wherein, 1403 and 1404 what represent is length and the width of antenna layers, and be understandable that, metal feeder layer itself is just a bent metal feeder, does not in fact form the edge of 1403 and 1404.
As shown in figure 15, coupling metal layer can be the apertured square-shaped metal layer of tool in the middle of.This coupling metal Rotating fields can adopt following size: the length of side 1501 of metal level is 43.6 millimeters, gap length 1502 is 22.8 millimeters, gap width 1503 is 2.5 millimeters, gap left side edge is 10.4 millimeters to the distance 1504 of metal level left side edge, and gap upper edge is 22.8 millimeters to the distance 1505 of metal level upper edge.
As shown in figure 16, in figure, the structure of paster metal level can adopt following size: paster metal width 1601 is 19 millimeters, paster metal length 1602 is 30 millimeters, paster metal left side edge is 6.8 millimeters to the distance 1603 of antenna structure left side edge, distance 1604 to antenna structure upper edge on the upside of paster metal is 12.3 millimeters, and length 1606 and the width 1605 of antenna layers are 43.6 millimeters.Be understandable that, paster metal level itself is just a block sheet metal, does not in fact form the edge of 1605 and 1606.
See Figure 17 A and Figure 17 B, show the overall appearance structure of above-mentioned antenna.Wherein, the thickness 1701 of every layer of stripline media layer and antenna medium layer is all 3.2 millimeters, the length of side 1702 of square floorboard is 59 millimeters, in antenna structure, the edge of each layer is 7.7 millimeters to the distance 1703 of floor edge, the spacing 1704 at the center of each adjacent metal throuth hole is 2.8 millimeters, and each metal throuth hole center is 3.8 millimeters to the distance 1705 of antenna layers structure corresponding edge.In addition, metallic screw is positioned on the metal throuth hole at the middle metal throuth hole in each limit of antenna layers structure and four summits place.
Owing to have employed the coupling feed way of bent feeder line in antenna, make the coaxial feeder be connected with strip line just in time be in the place that electric field is zero, the electrical connection between two floors that the outer conductor of coaxial line causes also can not affect the effect that two floor reduces back lobe.Specifically as can be seen from Figure 18, on the center line mutually orthogonal with antenna polarization direction, electric field is zero.When implementing the present embodiment, inventor finds that the couple feed structure in the present embodiment makes the cross-polarization levels of antenna reduce, and makes the isolation between cross-polarized two kinds of antennas improve about 20dB.
Adopt the technical scheme of the present embodiment, when being parallel to the antenna feed on ground to any one polarised direction, remaining two polarised direction electric fields be parallel in the concave metal ditch of the antenna both sides on ground, to be similar to constant amplitude reverse, thus the impact that residue two polarised directions are parallel to the antenna on ground is cancelled each other, thus the isolation that improve between antenna that polarised direction is parallel to ground, and do not affect yet polarised direction perpendicular to ground antenna between isolation.
It should be noted that, the antenna system of the embodiment of the present invention can be applied in the base station portion of enterprise wireless local area network (LAN) to realize in local area network (LAN) with polarization diversity frequently and space diversity.Owing to embodiment improves the isolation between each antenna, the signal that antenna receives may be used for triggering with Double RF card work frequently, also can by the signal directional transmissions with frequency Double RF card in WLAN (wireless local area network).In addition, in antenna system with frequently using commutation circuit to connect each signal port of Double RF card and each antenna port between Double RF card, can be covered by the sector control of commutation circuit being controlled to Double RF card signal.
It should be noted that, in this article, the such as relational terms of first and second grades and so on is only used for an entity or operation to separate with another entity or operating space, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.Term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or equipment.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment comprising described key element and also there is other identical element.
The above is only the embodiment of the application; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the application's principle; can also make some improvements and modifications, these improvements and modifications also should be considered as the protection range of the application.
Claims (10)
1. a communications antenna system, is characterized in that, comprising: multiple first antenna modules, and every two adjacent the first antenna modules are connected by a second antenna floor;
Described first antenna modules comprises a first antenna floor, first antenna and two concave metal ditches, wherein, the polarised direction of described first antenna is parallel to ground level, described first antenna is arranged on described first antenna floor, described two concave metal ditches are arranged on the both sides on described first antenna floor respectively, wherein, described concave metal ditch is spill in the plane being parallel to ground level, the two ends of described concave metal ditch indent respectively have a flank, wherein, one end flank connects the side on described first antenna floor, other end flank connects the side on described second antenna floor, and the sunk part of described two concave metal ditches be all positioned at described first antenna floor is installed the first antenna plane below,
One of them first antenna modules is used for, to the first antenna of other the first antenna modules except one of them first antenna modules described when feed, described feed is formed respectively the effect electric field of the first antenna of one of them the first antenna modules described in two concave metal ditches of one of them the first antenna modules described and is parallel to ground level and mutually reverse field distribution, so that mutually reverse effect electric field is cancelled out each other in two concave metal ditches of one of them the first antenna modules described;
Described antenna system also comprises the second antenna, and described second astronomical cycle is on described second antenna floor; The polarised direction of described second antenna is perpendicular to ground level.
2. antenna system according to claim 1, is characterized in that, described antenna system linearly type arrangement, wherein each first antenna floor and each second antenna floor all in the same plane.
3. antenna system according to claim 1, is characterized in that, described antenna system is in closing or semi-enclosed ring-type regular polygon, and wherein each the first adjacent antenna floor is equal with the angle between the second antenna floor.
4. antenna system according to claim 3, is characterized in that, described regular polygon is regular hexagon, and described each length of side orthohexagonal is 59 millimeters; The sole length of concave metal ditch described in each is 59 millimeters, bottom width is 8 millimeters, the degree of depth is 28.5 millimeters in ditch.
5. antenna system according to claim 1, is characterized in that, the structure on described first antenna floor is double floor, comprises the upper and lower parallel to each other, is connected between the upper and lower on described first antenna floor by metal column; Described first antenna is installed on the upper strata on described first antenna floor, and the flank of described concave metal ditch is connected to the lower floor on described first antenna floor.
6. antenna system according to claim 5, it is characterized in that, the structure on described second antenna floor is identical with described first antenna floor, and described second astronomical cycle is on the upper strata of described second antenna, and the flank of described concave metal ditch is connected to the lower floor on described second antenna floor.
7. antenna system according to claim 1, is characterized in that, the structure of described first antenna comprises two-layer stripline media, two-layer antenna medium, one deck coupling metal layer, one deck paster metal level, layer of metal feeder line layer;
Wherein, bottom in described two-layer stripline media is attached on described first antenna floor, described metal feeder layer is between described two-layer stripline media, top layer in two-layer described stripline media posts described coupling metal layer, bottom in two-layer described antenna medium is attached on described coupling metal layer, and the top layer in two-layer described antenna medium posts described paster metal level.
8. antenna system according to claim 7, is characterized in that, described coupling metal layer is slot-coupled metal level.
9. antenna system according to claim 7, is characterized in that, described metal feeder layer is bent coaxial feeder, and described bending angle is right angle, and described coaxial feeder realizes being electrically connected with outer conductor by coaxial feeding port.
10. antenna system according to claim 7, is characterized in that, described stripline media layer edge surrounding arranges multiple metal throuth hole.
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| CN201310356772.4A CN103441325B (en) | 2013-08-15 | 2013-08-15 | A kind of communications antenna system |
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| KR102566993B1 (en) * | 2018-10-24 | 2023-08-14 | 삼성전자주식회사 | An antenna module and a radio frequency apparatus including the same |
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| CN101341629A (en) * | 2006-03-16 | 2009-01-07 | 三菱电机株式会社 | Antenna assembly and method for manufacturing the same |
| CN101383449A (en) * | 2008-09-04 | 2009-03-11 | 北京航空航天大学 | Method for enhancing antenna separation degree |
| CN101425622A (en) * | 2008-11-20 | 2009-05-06 | 北京航空航天大学 | Floor configuration having enhanced isolation degree between two antennas |
| CN101645539A (en) * | 2009-08-28 | 2010-02-10 | 中国科学院光电技术研究所 | Low-mutual-coupling groove array antenna |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101341629A (en) * | 2006-03-16 | 2009-01-07 | 三菱电机株式会社 | Antenna assembly and method for manufacturing the same |
| CN101383449A (en) * | 2008-09-04 | 2009-03-11 | 北京航空航天大学 | Method for enhancing antenna separation degree |
| CN101425622A (en) * | 2008-11-20 | 2009-05-06 | 北京航空航天大学 | Floor configuration having enhanced isolation degree between two antennas |
| CN101645539A (en) * | 2009-08-28 | 2010-02-10 | 中国科学院光电技术研究所 | Low-mutual-coupling groove array antenna |
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