CN101080848A - Directed dipole antenna - Google Patents
Directed dipole antenna Download PDFInfo
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- CN101080848A CN101080848A CN200580011635.0A CN200580011635A CN101080848A CN 101080848 A CN101080848 A CN 101080848A CN 200580011635 A CN200580011635 A CN 200580011635A CN 101080848 A CN101080848 A CN 101080848A
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Abstract
A dual polarized variable beam tilt antenna having a superior Sector Power Ratio (SPR). The antenna may have slant 45 dipole radiating elements including directors, and may be disposed on a plurality of tilted element trays to orient an antenna boresight downtilt. The directors may be disposed above or about the respective dipole radiating elements. The antenna has a beam front-to-side ratio exceeding 20 dB, a horizontal beam front-to-back ratio exceeding 40 dB, a high-roll off, and is operable over an expanded frequency range.
Description
Priority claim
The application requires to enjoy the U.S. Provisional Application 60/577 of " Antenna " by name that submitted on June 4th, 2004,138 priority, and the application is the U.S. Patent application of submitting on December 16th, 2,004 10/737 that is called " Wideband Dual Polarized Base Station Antenna OfferingOptimized Horizontal Beam Radiation Patterns And VariableVertical Beam Tilt ", 214 partial continuous application (CIP), wherein this U.S. Patent application requires to enjoy the U.S. Provisional Patent Application 60/484 of " the Balun Antenna With Beam Director " by name that submitted on July 3rd, 2003,688 priority, in addition, the application still is the U.S. Patent application of submitting on November 7th, 2,003 10/703 that is called " AntennaElement; Feed Probe; Dielectric Spacer; Antenna and Method ofCommunicating with a Plurality of Devices ", 331 partial continuous application, this U.S. Patent application then requires to enjoy the priority of the U.S. Provisional Patent Application of submitting on June 26th, 2,003 60/482,689 that is called " Antenna Element; Multiband Antenna; and Methodof Communicating with a Plurality of Devices ".
Technical field
The present invention relates to field of antenna, relate in particular to antenna with the dipole radiation unit that in wireless communication system, uses.
Background technology
Along with the expansion of network traffic growth of requirement, service coverage area and the deployment of new system, mobile radio networks also obtains deployment and perfect constantly.For serving certain sector separately or being called as a plurality of antenna systems in certain zone of sub-district,, can cover bigger coverage, and the cellular-type communications system gains the name thus also by implementing these antenna system.These sub-district collectives have constituted the whole coverage that is used for specific wireless communication network.
What provide service for each sub-district is antenna array and the associated switch that the sub-district is inserted whole communication network.In general, antenna array is divided into the sector, wherein each antenna service respective sectors.For example, three antennas of antenna system can provide service for three sectors, and the coverage of each antenna is about 120 °.These antenna is perpendicular polarization normally, and has having a down dip to a certain degree, makes the directional diagram cell phone that uses of directed towards user slightly downwards of antenna.The normally function of landform and other geographical feature that has a down dip of this hope.Yet before actual installation and test, the optimum value that has a down dip is always not foreseeable.Therefore, when the actual installation antenna, always need to customize having a down dip of each antenna be set.Usually, big capacity cellular system may be optimized in 24 hours cycle again.In addition, the user wishes that antenna can have the highest gain and very little intermodulation (IM) under the situation of having specified size.Therefore, the user can stipulate which antenna is best for given network implementation mode.
Summary of the invention
Another object of the present invention is, a kind of dual polarized antenna is provided, and this antenna has the directivity of improvement and the sector isolation of improvement is provided, with the sector power ratio (SPR, Sector Power Ratio) that realizes increasing.
An object of the present invention is, a kind of double polarized antenna with optimal level surface radiation directional diagram is provided.Target provide a kind of horizontal beam front side with 20dB at least than, at least before and after the horizontal beam of 40dB than and the antenna pattern of improved roll-off characteristic.
Another object of the present invention provides a kind of antenna array of cross-polarization performance optimum, its 120 the degree horizontal sector in same polarization and the ratio minimum of cross polarization be 10dB.
Another object of the present invention provides a kind of antenna array with horizontal directivity pattern beamwidth of 50 °～75 °.
Another object of the present invention provides a kind of antenna array of intermodulation minimum.
Another object of the present invention provides a kind of double polarized antenna that can work on extended frequency band.
Another object of the present invention provides a kind of double polarized antenna that can produce adjustable vertical plane radiation patterns.
Another object of the present invention provides the antenna that a kind of interport isolation with enhancing is at least 30dB.
Another object of the present invention provides a kind of antenna of cheapness.
These and other target of the present invention by a kind of be used to transmit and receive have+45 ° and-45 ° of electromagnetic improvement antenna arrays of linearly polarized realize.
Description of drawings
Fig. 1 is the perspective view according to the dual polarized antenna of first preferred embodiment of the invention;
Fig. 2 has removed the broadband perspective view of multistage ground plane configuration of 45 crossed dipoles radiation elements that tilts, and the pallet profile that is used for describing the RF absorber of the inclination of ground plane and RF choke;
Fig. 3 is the perspective view in N cross-shaped directors of dipole radiation unit upper support;
Fig. 4 is the rearview of an element tray, has described the design of the micro belt shifting phase that is used for every pair of crossed dipoles radiation element of feed;
Fig. 5 is a rearview of describing the dual polarized antenna of cable-fed network, one of each other dual polarized antenna of micro belt shifting phase feed;
Fig. 6 is the perspective view that comprises the dual polarized antenna of RF absorber, and wherein the RF absorber is used for the radiation from phase shifter microstrip line dissipation RF, and prevents RF electric current cross-couplings;
Fig. 7 describes the figure that compares with typical cross dipole antenna antenna pattern with the high roll-off radiation pattern of the present invention's realization;
Fig. 8 A and 8B are the figure that describes the beam pattern in three sector site of using the dressing plate antenna;
Fig. 9 A and 9B describe the figure that uses according to the beam pattern in three sector site of antenna of the present invention;
Figure 10 is the perspective view that has comprised the another embodiment of the present invention of double frequency-band radiation element;
Figure 11 be in one of radiation element deploy the perspective view embodiment illustrated in fig. 10 of verge ring;
Figure 12 is a perspective view of all having disposed the embodiment of the invention of verge ring on each radiation element;
Figure 13 is the view of various appropriate configurations of directors;
Figure 14 is the close-up illustration of double frequency band aerial; And
Figure 15 has described the array of double frequency-band and single band dipole radiation unit.
Embodiment
With reference now to Fig. 1,, wherein generality has shown the wideband dual polarized base station antenna 10 with optimal level surface radiation directional diagram and variable vertical beam inclination.As can be seen, antenna 10 comprises a plurality of element tray 12, in the element tray deploy 45 crossed dipoless (X dipole) radiation element 14 that tilts in the broadband that dipole is arranged in to 16 is arranged.Each element tray 12 is all with the form oblique arrangement of " dominoes that pushes over ", and supported by a pair of tray supports 20.As depicted in figs. 1 and 2, integrated element tray 12 and tray supports 20 are fixed on the outer trays 22, make laterally to form the gap between the sidewall of tray supports 20 and pallet 22.As shown, each tray unit 12 all has the upper surface of definition respective dipole to 16 ground plane, and have thereon at interval and the feed dipole to the respective air medium microstrip line 30 of each dipole radiation unit 14 of 16.Between the sidewall of pallet 22, fix a plurality of conductions arc 26, with rigidity that antenna 10 is provided and improve isolation between the dipole radiation unit 14.
As shown, above each tray unit 12, extend a pair of cable support thing 32.Supporter 32 support from cable 76 to air dielectric microstrip line 30 and to its printed circuit board (PCB) 50 that adheres to down the corresponding low IM RF stube cable 34 of formed microstrip feed network, will be discussed in greater detail with reference to figure 4 after a while.
With reference now to Fig. 2,, wherein shown the perspective view of the element tray 12 of arranging with " dominoes that pushes over " form in the mode of the sidewall of tray supports 20 of partly cut-away and pallet 22.Each tray unit 12 all is to arrange with the form of this " dominoes that pushes over ", so that have a down dip oriented phase to answer the directional diagram optical axis (boresight) of dipole radiation unit 14 with predetermined, for instance, this predetermined having a down dip can be the mid point of array adjustable slant range.In this example, about 4 ° of the maximum wave beam degree of skewness of the expection of antenna 10 and the mechanical optical axis have a down dip and depart from consistently, rather than about 8 ° mechanical optical axis departs under the situation that does not have inclined element pallet 12.According to the present invention, the maximum horizontal beam degree of skewness is compared with conventional method and is reduced to about 5 °, considers the wide bandwidth of operation and the slant range of antenna, and this value is an acceptable very.
Still with reference to figure 2, as shown, tray supports 20 is separated an elongate gap with the adjacent wall of respective trays 22, defines RF choke 36 betwixt.This choke 36 that is formed by physical geometry has advantageously reduced the RF electric current that flows on the back side of pallet 22 externally.Faradic reduction has directly reduced backward radiation on outer trays 22 back sides.Make before and after the radiation comprise than the critical design criterion that reaches maximum related this RF choke 36 outer trays 22 on roll over RF choke 36 between the sidewall rim 38 of the height of height, tray supports 20 of sidewall 38 and tray supports and pallet 22.Preferably, RF choke 36 is λ/4 of radiation element 14 centre frequencies, and in addition, because the internal reflection in the air dielectric is eliminated, RF choke 356 has the narrow bandwidth with frequency dependence, and the choke bandwidth is about 22% of centre frequency.
According to an alternative embodiment of the invention, in RF choke 36, add a RF absorber 39, so that the frequency dependence of RF choke reduces, create the bigger RF choke of bandwidth thus.Preferably, described RF absorber 39 comprises the very high carbon of degree, slows down and any RF reflected wave that dissipates, and avoids influencing the main beam radiation that cross dipole antenna 12 is produced.As shown, the cross polarization main beam radiation of 45 cross dipole antenna that tilt, 14 generations+/-45 degree directions, each wave beam all has vertical component and horizontal component.When these components when 360 degree have all even equal amplitude on the directions, cross polarization is very good.For the plate aerial 10 with linearly aligned crossed dipoles 14 shown in Figure 1, the horizontal component of each beam direction is roll-offed sooner than vertical component.This means that the vertical beam width of each beam direction will be wider than horizontal beam width, and the vertical component of propagating along the edge of respective trays 12 will be more than horizontal component.Because the surface area of thin metal tray 12 is limited, the surface current on it is less with the possibility of horizontal component reflected back main beam radiation.On the contrary, along the edge of respective trays 12, stairstepping baffle plate 35 must comprise a lot of vertical component vector currents.Very advantageously be that by RF absorber 39 is added in the RF choke 36, the vertical component of each beam direction is by the main beam radiation of minimum degree ground reflected back crossed dipoles 14.So, cremasteric reflex device not after crossed dipoles 14.
Preferably, element tray 12 is made by brass alloys, and in order to weld it is carried out zinc-plated polishing.As shown, the main effect of element tray is to support radiation element 14 at specific direction.This direction provides the vertical and horizontal beam directional diagram of optimal balance for two ports of antenna 10.In addition, this direction also provides the improvement between each port to isolate.In addition, element tray 12 provides RF earth point at coaxial cable/air band interface.
Preferably, this tray supports is made by aluminium alloy.The main effect of tray supports is in five element tray 12 of specific direction upper support, so that the wave beam deflection minimum of horizontal directivity pattern.
Compare with element tray 12, outer trays 22 is preferably made by thicker aluminum alloy materials, and described outer trays employing Alodine (Alodine) coating processing, so that prevent the corrosion that external environment condition produces.The major function of outer trays 22 is to support the local array assembly.Its miscellaneous function is that the radiation by will be backward reduces to minimum and the RF power of radiation is focused on forward sector towards antenna 10, thereby such as already explained, the front and back ratio of maximization antenna pattern.
With reference now to Fig. 3,, as shown, the parasitic broadband cross dipole director 40 of having disposed N horizontal expansion on radiation element 14 has been described, and by air band feeding network 30 feeds.N is 1,2,3,4 ..., show in the present embodiment that wherein N equals 4.Preferably, the upper lateral extended element of parasitic broadband cross dipole director 40 is by each other evenly at interval, and as shown in handling wherein as at broadened bandwidth, upper component preferably has the length of weak point.The spacing of the lower member of director 40 and radiation element 14 is more tight, so that the RF energy appropriately is coupled to director in a kind of mode that in the impedance matching of remaining valid, provides directional diagram to strengthen, making that director 40 is actual does not realize gain, and this is different with yagi-uda (Yagi-Uda) antenna that has reflector and create the spacer element that gains separately.Advantageously, not to realize gain, but in the similar 3dB beamwidth of maintenance, outside the 3dB of antenna pattern beamwidth, realized improved directional diagram roll-off characteristic.Preferably, the about .033 λ in upper elements of directors 40 spaces (centre frequency), and between bottom director element and the radiation element 14 by parasitic structure 42 about .025 λ (λ is the wavelength of the centre frequency of radiation element 14 designs) at interval.
With reference now to Fig. 4,, what this figure showed is a low-loss printed circuit board (PCB) 50, its deploy a usefulness 52 summarize the microstrip capacitive phase shifter system that shows.This low-loss PCB50 is fixed on the back side of respective element tray 12.Microstrip capacitive phase shifter system 52 is merged into its feed by respective cable 34 with a pair of relative corresponding radiation element 14 couplings.
As shown in Figure 4, each microstrip phase shifter system 52 all comprises a phase shifter cursor slide 56, fixes a dielectric member 54 under it, and this cursor slide can center on pivoting point 58 arc adjustment by corresponding carriage release lever 60.Carriage release lever 60 can vertically be adjusted with a far-end crank (not shown), so that selectively phase shifter 54 and respective media member 56 are positioned on a pair of arc feeder line part 62 and 64, thereby adjusts the therefrom phase velocity of conduction.By a pair of non-conductive insulator 66 carriage release lever 60 being fixed to PCB50 goes up but leaves the space thereon.The loss coaxial cables 34 usefulness transmission medium of deciding is used to provide being electrically connected between phase shifter system 52 and the radiation element 14.Optimize gain performance by phase place and amplitude distribution on the radiation element 14 of accurate control antenna 10.And the highly stable phase shifter design that shows among Fig. 4 has realized this control.
With reference now to Fig. 5,, what this figure showed is the back side of antenna 10, has described cable-fed network, and each microstrip phase shifter system 52 all is one of other poliarizing antenna 14 feed.Input 72 is called as port I, and it is to be used for the input that-45 polarization are tilted, and is called as port II and import 74, and it is to be used for+input that 45 polarization are tilted.As shown in Figure 4, cable 76 is the feed lines that are coupled with a respective phase shifter system 52.Represent that by the output of this phase shifter system 52 of output 1～5 expression dipole by the corresponding output feed of phase shifter system 52 is to 16.
With reference now to Fig. 6,, the figure illustrates further comprise be positioned at below each element tray 12, the antenna 10 of the RF absorber 78 after the antenna 10, the reverse RF radiation that is used to dissipate of this RF absorber from the phase shifter microstrip line, and prevent that the RF electric current is coupled between phase shifter system 52.
With reference now to Fig. 7,, the antenna pattern of this figure ratio before and after mark 68 has shown having of being realized according to antenna 10 of the present invention synoptically height roll-offs and be high, 65 ° of plate aerials of this directional diagram and 69 standards with dipole radiation directional diagram that show form and contrast.This high roll-off radiation pattern 68 is the significant improvement on typical dipole direction Figure 69.On the point of 3dB, horizontal beam width still remains on about 65 degree.
In addition, the design with radiation element 14 of director 40 is providing very big improvement aspect the horizontal beam radiation pattern of antenna, and the front side that wherein shows in Fig. 7 ratio is 23dB.As shown in Figure 7, traditional crossed dipoles radiation element produces the front side than the horizontal beam radiation pattern that is about 17dB.According to the present invention, the broadband parasitic directors 40 that is integrated on the radiation element 14 advantageously reaches 10dB with the antenna front side than improving, and has shown the 6dB increment in the example of Fig. 7.This improved front side is also referred to as " height roll-offs " design than effect.In this embodiment, radiation element 14 and cross dipole orientation 40 have advantageously kept the horizontal beam widths of about 65 degree on the 3dB of antenna point, this is different with having more directors with the traditional Yagi-Uda antenna that obtains more gains and reduce horizontal beam width thus.
Still, show the outstanding front and back ratio of antenna 10 with reference to figure 7.As shown, plate aerial 10 has the backside lobe that fully reduces, and has realized the front and back ratio of about 40dB thus.In addition, be that next-door neighbour's fan antenna/isolation between antennas of 26dB is compared with the size of 65 ° of plate aerials of standard, next-door neighbour's fan antenna/isolation between antennas of antenna 10 approximately is 40dB.In Fig. 7, can understand,, can after radiation lobe, provide 120 ° no sector interference zone, then be referred to as " quiet taper " in the present invention by significantly reducing backside lobe.
With reference now to Fig. 8 A and 8B,, what this figure showed is the several advantages that had when use is of the present invention in three sector site.What Fig. 8 A described is the 65 ° of plate aerials of standard that use in three sector site, and what Fig. 8 B described is the 90 ° of plate aerials of standard that use in three sector site.The remarkable overlapping of these antenna antenna pattern will produce imperfect subregion, may cause thus that More Soft Handoff increases, interference signal increases, call out and abandon and capacity reduces.
With reference now to Fig. 9 A and 9B,, what this figure showed respectively is the technological merit of the present invention that uses in three sector site according to 65 ° of plate aerials of the present invention and 90 ° of plate aerials.With reference to figure 9A, what this figure described is that the overlapping of radiation lobe of antenna significantly reduces, and realizes littler Zone switched thus.Do like this and can greatly improve call quality, and can increase by 5～10% site capacity.
Back with reference to figure 7, shown in Fig. 8 A～8B and Fig. 9 A～9B, the unexpected lobe of stretching 120 ° of radiation sector extensions can overlap with adjacent radiation pattern.The ratio of the expectation power that not expecting of transmitting in the lobe outside these 120 ° of forward sector transmits in 120 ° of sectors of power and this has defined so-called sector power ratio (SPR).Advantageously, the present invention has realized the SPR less than 2%, and wherein SPR is defined by following equation:
This SPR is a significant improvement on the dressing plate antenna, and is to be used to describe measuring of technological merit of the present invention.At 90 ohm, director 40 is impedance matchings with microstrip line 30, but can not infer in view of the above that this impedance is so limited.Radiation element 14 and cross dipole directors 40 have mutual transient electromagnetic coupling, and this coupling is to be produced by 90 ohm source impedance of matching network and source voltage.By introducing this high roll-off antenna design, can provide much other system-level performance benefit, comprising the soft handoff capabilities of improving, the common station channel disturbance that reduces and because the base station system capacity of the sector that increases-increase that sector inhibition is produced.
With reference now to Figure 10,, the figure illustrates an alternative embodiment of the invention, it can be seen, this embodiment comprises a single band bipolar (dualpol) antenna 80, this antenna comprises inclination 45 little ring (MAR with holes that tilt 45 crossed dipoles radiation elements 14 and center on described dipole, microstrip annular ring) radiator 94 will briefly be described these contents with reference to Figure 11 hereinafter.In this embodiment, antenna 80 comprises N annular (ring-type) director 82, the wherein N=1,2,3,4 that is deployed on the radiation element 14 ...This N director 82 is configured to the parallel polygonal member of perpendicular separation, and it is shown as concentric ring here, but can not derive described director 82 in view of the above only is confined to this geometry.As shown in figure 13, other director geometry also is operable.
The set of the annular director 82 that piles up can also comprise the ring of equal circumference, and the improvement that simultaneously still the keeps similar performance of roll-offing, and can produce the SPR of improvement in conjunction with aforesaid system benefit thus, still keeps similar 3dB beamwidth simultaneously.
With reference now to Figure 11,, this figure has shown a double frequency band aerial at mark 90 places, and wherein this antenna comprises one group of director ring 92 that is deployed on ring little with holes (MAR) radiator 94 that piles up.In this view, four feed probes 96 (2 balanced feeding to) of paired arrangement are arranged, the biorthogonal polarization of feed MAR radiator 94.In this embodiment of the present invention, as shown, director 92 is the thin rings that are stacked on the corresponding MAR radiator 94.Advantageously, the element pattern roll-off characteristic of the improvement that this double frequency band aerial 90 also has outside the 3dB beamwidth has improved SPR thus in the 3dB beamwidth that keeps equivalence.
With reference now to Figure 12,, what this figure showed is the double frequency band aerial 100 with annular director 82 and 92.The annular director 92 that is on the MAR radiator 94 also carries out alternately with X dipole radiation unit 14, and for X dipole radiation unit provides some additional beam shaping, the roll-off characteristic that comprises the improvement of the main beam outside the 3dB wave beam bandwidth, and the front and back radiation that improves, can in the similar 3dB beamwidth of maintenance, produce SPR and system's benefit of previous described improvement thus.
On MAR radiator elements 94 and X dipole radiation unit 14, all has the corresponding annular director.The annular director 82 that is used for X dipole radiation unit 14 still is concentric with the annular director 92 that is used for MAR radiator 94.Aforementioned benefit about director is equally applicable to each frequency band (the front and back ratio of the SPR of improved roll-off characteristic outside the 3dB beamwidth and generation improvement just) here.
With reference now to Figure 13,, what this figure showed is other suitable geometry of director 82 and 92, but should not infer in view of the above that described director only limits to the director of similar annular.Circle can be considered to be the polygon with unlimited bar limit, and what use in accessory claim then is the term polygon.
With reference now to Figure 14,, what this figure showed is the close-up illustration of double frequency band aerial 80, wherein this double frequency band aerial 80 MAR radiator 94 of having the cross-shaped directors 40 of extending and do not have relevant annular director on radiation element 14.
With reference now to Figure 15,, this illustrates the plate aerial 110 with radiation element 14 arrays, and wherein each radiation element has cross-shaped directors 40, and as selection, this antenna also can be equipped with the MAR radiator 94 that is deployed on the common ground face 112.The advantage of this design comprises the H plane pattern of having improved the upper frequency radiation element that is used for the double frequency-band topological structure.The H plane pattern of described improvement provides the roll-off characteristic of improvement and the front and back ratio of improvement outside the 3dB beamwidth.Because the low level of side and reradiation, the roll-off characteristic of described improvement adds the radiator decoupling that provides slight according to the quantity of the director of being introduced.
Though described the present invention with reference to concrete preferred embodiment, for a person skilled in the art, under the situation of having read the application, various modifications and changes will be conspicuous.Thus, accessory claim is to explain that in the wide as far as possible mode of scope the present invention has then comprised all of these changes and modifications under the situation of having considered prior art.
Claims (50)
1. antenna comprises:
At least one 45 dipole radiation unit of tilting is suitable for producing wave beam; And
And then at least one director that described at least one dipole radiation unit disposes is suitable for improving the sector power ratio (SPR) of described wave beam when keeping equivalent 3dB beamwidth.
2. antenna as claimed in claim 1, wherein, described antenna has the sector power ratio less than 10%.
3. antenna as claimed in claim 2, wherein, described antenna has the sector power ratio less than 5%.
4. antenna as claimed in claim 3, wherein, described antenna has the sector power ratio less than 2%.
5. antenna as claimed in claim 1 comprises at least two directors.
6. antenna as claimed in claim 5, wherein, described at least two directors are parallel to each other.
7. antenna as claimed in claim 5, wherein, at least some directors mutually evenly at interval.
8. antenna as claimed in claim 7, wherein, one of described director is compared more approaching described radiation element with adjacent described director.
9. antenna as claimed in claim 1, wherein, described radiation element is the crossed dipoles radiation element.
10. antenna as claimed in claim 9, wherein, described director has at least two members.
11. antenna as claimed in claim 10, wherein, described member be in vertical direction with the parallel dagger of described crossed dipoles radiation element.
12. antenna as claimed in claim 1, wherein, described at least one director comprises polygonal ring.
13. antenna as claimed in claim 12 also comprises a plurality of polygonal ring that is deployed on the radiation element.
14. antenna as claimed in claim 13, wherein, described polygonal ring is concentric.
15. antenna as claimed in claim 14, wherein, described polygonal ring has common diameter.
16. antenna as claimed in claim 14, wherein, described polygonal ring has different-diameter, and forms a taper director.
17. antenna as claimed in claim 10, wherein, described member has different length, and forms a taper director.
18. antenna as claimed in claim 1, wherein, described antenna has the front side ratio of 20dB at least.
19. antenna as claimed in claim 1, wherein, described antenna has the front and back ratio of 40dB at least.
20. an antenna comprises:
The ground plane of a plurality of inclinations is with " dominoes that pushes over " alignment arrangements; And
A plurality of dipole radiation unit is deployed on the described ground plane and is arranged such that described dipole radiation unit limits the optical axis and has a down dip.
21. antenna as claimed in claim 20, wherein, described antenna has downwards bevel beam, also comprises with the coupling of a plurality of dipole radiations unit and is suitable for adjusting selectively the feeding network that antenna beam has a down dip.
22. antenna as claimed in claim 21, wherein, the described optical axis has a down dip and roughly is limited at the mid point of whole downwards bevel beam.
23. antenna as claimed in claim 22, wherein, described ground plane is disposed with fixed range each other.
24. antenna as claimed in claim 21, wherein, it is right that described dipole radiation unit is grouped into, and wherein, limits on each ground plane that at least one is described right.
25. an antenna comprises the radiation element that is deployed on the pallet, described pallet has the back side and at least one ground plane that is deployed on the pallet, and described pallet has the sidewall that separates and limit betwixt the gap with described ground plane.
26. antenna as claimed in claim 25, wherein, described gap forms the RF choke, and this RF choke is configured to reduce at the mobile RF electric current of tray back.
27. antenna as claimed in claim 26 also comprises the RF absorber that is deployed in the RF choke.
28. antenna as claimed in claim 25, wherein, the height of described pallet side wall is configured to increase the front and back ratio of antenna.
29. antenna as claimed in claim 25 comprises also being deployed in ground plane RF absorber afterwards that the RF electric current that described RF absorber is suitable for reducing between the described ground plane is coupled.
30. a double frequency band aerial comprises:
First inclination, 45 dipole radiation units are suitable for producing first wave beam that is in first frequency;
And then first director disposed of first radiation element, this first director is suitable for improving the sector power ratio of wave beam when keeping equivalent 3dB beamwidth; And
And then second radiation element disposed of first radiation element, this second radiation element is suitable for producing second wave beam that is in second frequency.
31. double frequency band aerial as claimed in claim 30 also comprises and then second director of second radiation element deployment, this second director is suitable for improving the sector power ratio of second wave beam when keeping equivalent 3dB beamwidth.
32. double frequency band aerial as claimed in claim 31, wherein, described first director comprises at least two members.
33. double frequency band aerial as claimed in claim 32, wherein, described second director comprises at least two members.
34. double frequency band aerial as claimed in claim 33, wherein, described first and second directors are deployed on corresponding first and second radiation elements.
35. double frequency band aerial as claimed in claim 30, wherein, described second radiation element comprises tilting 45 little ring radiation elements with holes.
36. double frequency band aerial as claimed in claim 30, wherein, described first radiation element comprises the cross radiator.
37. double frequency band aerial as claimed in claim 36, wherein, described second radiation element comprises the polygon radiator.
38. double frequency band aerial as claimed in claim 30, wherein, described first director comprises at least one dagger.
39. double frequency band aerial as claimed in claim 31, wherein, described second director comprises at least one polygonal member.
40. double frequency band aerial as claimed in claim 37, wherein, described first director comprises a plurality of daggers.
41. double frequency band aerial as claimed in claim 37, wherein, described second director comprises a plurality of polygonal member.
42. double frequency band aerial as claimed in claim 30, wherein, described second radiation element is around first radiation element.
43. double frequency band aerial as claimed in claim 42, wherein, described first radiation element comprises cross dipole radiation unit.
44. double frequency band aerial as claimed in claim 42, wherein, described second radiation element comprises polygon.
45. an antenna comprises:
The 45 dipole radiation units of tilting are suitable for producing wave beam; With
The director parts are used for directed described wave beam.
46. double frequency band aerial as claimed in claim 45, wherein, described director parts are set up the beam sector power ratio less than 10%.
47. double frequency band aerial as claimed in claim 45, wherein, described director parts are set up the beam sector power ratio less than 5%.
48. double frequency band aerial as claimed in claim 45, wherein, described director parts are set up the beam sector power ratio less than 2%.
49. double frequency band aerial as claimed in claim 45, wherein, described director parts are set up at least about ratio before and after the wave beam of 40dB.
50. double frequency band aerial as claimed in claim 45, wherein, described director parts are set up the wave beam front side ratio at least about 20B.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US57713804P | 2004-06-04 | 2004-06-04 | |
| US60/577,138 | 2004-06-04 | ||
| PCT/US2005/012528 WO2005122331A1 (en) | 2004-06-04 | 2005-04-13 | Directed dipole antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101080848A true CN101080848A (en) | 2007-11-28 |
| CN101080848B CN101080848B (en) | 2012-09-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2005800116350A Active CN101080848B (en) | 2004-06-04 | 2005-04-13 | Directed dipole antenna |
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| Country | Link |
|---|---|
| CN (1) | CN101080848B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102769174A (en) * | 2011-05-03 | 2012-11-07 | 安德鲁有限责任公司 | Multiband antenna |
| CN102780091A (en) * | 2012-07-31 | 2012-11-14 | 华南理工大学 | Circular polarization spiral antenna with high low elevation gain |
| CN105051971A (en) * | 2013-03-29 | 2015-11-11 | 日本电业工作株式会社 | Phase shifter, antenna and radio apparatus |
| TWI559614B (en) * | 2014-10-21 | 2016-11-21 | Chunghwa Telecom Co Ltd | Dual - frequency directional antenna device and its array |
| CN109273833A (en) * | 2017-07-18 | 2019-01-25 | 霍尼韦尔国际公司 | In the crossed dipoles at low elevation angles with enhancing gain |
| CN109417219A (en) * | 2016-07-05 | 2019-03-01 | 凯瑟雷恩欧洲股份公司 | Antenna system at least one dipole shape radiator assemblies |
| CN110741508A (en) * | 2017-05-03 | 2020-01-31 | 康普技术有限责任公司 | Multiband base station antenna with crossed dipole radiating elements |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6072439A (en) * | 1998-01-15 | 2000-06-06 | Andrew Corporation | Base station antenna for dual polarization |
| US6211841B1 (en) * | 1999-12-28 | 2001-04-03 | Nortel Networks Limited | Multi-band cellular basestation antenna |
| US6547140B2 (en) * | 2000-11-29 | 2003-04-15 | Xerox Corporation | Microwave barcode reader using dipole antenna |
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| CN102769174A (en) * | 2011-05-03 | 2012-11-07 | 安德鲁有限责任公司 | Multiband antenna |
| CN102769174B (en) * | 2011-05-03 | 2016-09-21 | 康普技术有限责任公司 | Multiband aerial |
| CN102780091A (en) * | 2012-07-31 | 2012-11-14 | 华南理工大学 | Circular polarization spiral antenna with high low elevation gain |
| CN102780091B (en) * | 2012-07-31 | 2014-07-02 | 华南理工大学 | Circular polarization spiral antenna with high low elevation gain |
| CN105051971A (en) * | 2013-03-29 | 2015-11-11 | 日本电业工作株式会社 | Phase shifter, antenna and radio apparatus |
| TWI559614B (en) * | 2014-10-21 | 2016-11-21 | Chunghwa Telecom Co Ltd | Dual - frequency directional antenna device and its array |
| US10854997B2 (en) | 2016-07-05 | 2020-12-01 | Telefonaktiebolaget Lm Ericsson (Publ) | Antenna array with at least one dipole-type emitter arrangement |
| CN109417219A (en) * | 2016-07-05 | 2019-03-01 | 凯瑟雷恩欧洲股份公司 | Antenna system at least one dipole shape radiator assemblies |
| CN110741508A (en) * | 2017-05-03 | 2020-01-31 | 康普技术有限责任公司 | Multiband base station antenna with crossed dipole radiating elements |
| CN110741508B (en) * | 2017-05-03 | 2021-03-12 | 康普技术有限责任公司 | Multiband base station antenna with crossed dipole radiating elements |
| CN109273833A (en) * | 2017-07-18 | 2019-01-25 | 霍尼韦尔国际公司 | In the crossed dipoles at low elevation angles with enhancing gain |
| CN109273833B (en) * | 2017-07-18 | 2022-11-04 | 霍尼韦尔国际公司 | Crossed dipole with enhanced gain at low elevation angles |
| CN115473054A (en) * | 2022-09-27 | 2022-12-13 | 南京理工大学 | Rapid synthesis method of ultra-wideband circular common-caliber array |
| CN115473054B (en) * | 2022-09-27 | 2023-12-15 | 南京理工大学 | Rapid synthesis method of ultra-wideband circular common-caliber array |
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