CN103346411A - Orientation ground station antenna and arrangement method for earth air wideband communication system - Google Patents
Orientation ground station antenna and arrangement method for earth air wideband communication system Download PDFInfo
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- CN103346411A CN103346411A CN2013102387194A CN201310238719A CN103346411A CN 103346411 A CN103346411 A CN 103346411A CN 2013102387194 A CN2013102387194 A CN 2013102387194A CN 201310238719 A CN201310238719 A CN 201310238719A CN 103346411 A CN103346411 A CN 103346411A
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Abstract
The invention relates to an orientation ground station antenna and an arrangement method for an earth air wideband communication system. The orientation ground station antenna comprises radiation elements, a reflector, a feed network, a feed port, an antenna cover, an adjusting support used for adjusting an antenna elevation angle and an embracing rod for fixing the antenna. At least four radiation elements are arranged to be a radiation set in a linear mode in the vertical direction, and three radiation sets are arranged to be a surface-shaped radiation array in the horizontal direction. An elevation angle above zero is arranged upwards by the antenna through the adjusting support. According to the orientation ground station antenna and the arrangement method for the earth air wideband communication system, long-distance covering can be achieved, the covering distance of 200km can be achieved at the flying height of 8km, good covering flatness can be achieved in the whole airline, and interference on ground mobile communication under a tower can be reduced. By adjusting the elevation angle of the antenna, the covering distance of the antenna and the covering effect of the middle of the antenna can be adjusted; through shaping of wide-beam directional diagram shaping and special antenna arrangement, directive antennas can cover the whole airspace range, and in addition, space diversity or MIMO application can be effectively supported.
Description
Technical field
The present invention relates to wireless communication field, particularly a kind of directed earth station antenna and aligning method for the empty wide-band communication system in ground.
Background technology
Along with the continuous development of wireless communication technology, people no longer are satisfied with the communication whenever and wherever possible on ground, and the interchange of wishing also to realize information aloft with share.Realize that at flight a kind of method of data communication is wireless signal to be provided for via satellite aloft aircraft.But this scheme traffic rate is limited, and cost is very high.
The empty wide-band communication system in ground utilizes ground station to provide wireless signal for the aircraft on the course line, realizes ground outage speed communication.Transmit scheme with respect to satellite, the cost of building a station of the empty wide-band communication system in ground is lower.The empty wide-band communication system in ground is based on LTE(Long Term Evolution, Long Term Evolution) standard, adopt OFDM(Orthogonal Frequency Division Multiplexing, OFDM), MIMO(Multiple Input Multiple Output, multiple-input and multiple-output) advanced wireless communication technology such as, cost that can be lower is realized the higher data traffic rate.
Because the flying speed of aircraft is very fast, the general requirement of the coverage distance of the empty wide-band communication system in ground reaches more than the 100km, so earth station antenna will have bigger gain.Owing to may there be many webbed course lines that are interweaved in a zone, so ground station wants can cover whole 360 and spends the horizontal plane orientation, and this requires earth station antenna that bigger beamwidth is arranged.Different with land mobile communication, the earth-space communication base station range is very big, and the signal level decline is very serious, and how making signal level relatively steadily also is the key issue that the empty wide-band communication system in ground need solve.A solution is to adopt high-gain omni-directional antenna.
Though omnidirectional antenna can cover whole 360 degree horizontal azimuths, because the difference of earth-space communication and land mobile communication, omnidirectional antenna is used in the empty wide-band communication system in ground and has a series of problems.
The gain of omnidirectional antenna is generally not high enough, and increases after gain reaches certain value that the antenna length gain promotes and not obvious again.For the coverage distance of 200km, the gain of omnidirectional antenna not enough.
Second problem that omnidirectional antenna exists is that website middle part covering quality is not high.Because it is dark that zero of omni-directional antenna pattern middle part fell into, received signal level significantly declines when causing aircraft to leap directly over the ground station.
The energy of the empty wide-band communication system earth station antenna in ground but has portion of energy to be leaked to the bottom to overhead radiation, disturbs land mobile communication.The energy intensity of omni-directional antenna pattern upper and lower is the same substantially, and is therefore more serious to the interference of land mobile communication under the tower.
MIMO is one of key technology of LTE, adopts the MIMO technology can promote the traffic rate of the empty wide-band communication system in ground at double, and this requires earth station antenna to support MIMO.
For solving the above technical problem, the present invention aims to provide a kind of directed earth station antenna and aligning method for the empty wide-band communication system in ground, is realizing that big coverage distance basis obtains good covering performance.
Summary of the invention
The object of the present invention is to provide a kind of on the practical flight circuit coverage big, cover good uniformity, middle part covering quality height, bottom disturb little, support the directed earth station antenna that is used for the empty wide-band communication system in ground that MIMO uses, and effectively solve under the earth-space communication environment with directional antenna and realize the antenna alignment method that evenly covers.
A kind of directed earth station antenna for the empty wide-band communication system in ground is characterized in that, comprises radome, reflecting plate, feeding network, the feed port that is connected with feeding network and is fixed for regulating the adjustment support of aerial angle with radome; Described reflecting plate is provided with some radiating elements; All radiating elements, feeding network and reflecting plate on the reflecting plate are encapsulated in the radome; Wherein, at least three above radiating elements vertically linear array become a radiation group, three radiation group along continuous straight runs are arranged in a planar radiating curtain, all radiating elements are arranged on the reflecting plate along equidirectional, described feeding network is arranged on the below of reflecting plate, described adjustment support one end is fixed on the radome back side, and the other end is fixed on the described pole, and antenna upwards arranges one greater than the elevation angle of zero degree by described adjustment support.
At above-mentioned a kind of directed earth station antenna for the empty wide-band communication system in ground, described adjustment support comprises two fixed mounts that are fixed on the described radome back side, the last end support that is connected with two fixed mounts and following end support, be used for the folder sign indicating number of fixed antenna on described pole, described end support down comprises a rotating shaft and two turning arms, described two turning arms open one greater than the angle of zero degree, constitute a V-arrangement and adjust support, and described V-arrangement is adjusted support, and Open Side Down.
At above-mentioned a kind of directed earth station antenna for the empty wide-band communication system in ground, described feeding network comprises that radiation group feeding network, feeder cable and merit divide plate; Three radiation groups are carried out feed by identical radiation group feeding network, and three radiation groups divide plate to be connected with feeder cable by merit, and merit divides plate to be connected with feed port by feeder cable; The length of the centre feed cable of radiation group is less than the length of the both sides feeder cable that connects both sides radiation group in the middle of connecting, and the length of the both sides feeder cable of connection both sides radiation group is identical; The centre feed cable is than the centre frequency guide wavelength of short 0.2 to 0.6 feeder cable of both sides feeder cable.
At above-mentioned a kind of directed earth station antenna for the empty wide-band communication system in ground, described radiating element is the perpendicular polarization radiating element.
At above-mentioned a kind of directed earth station antenna for the empty wide-band communication system in ground, described radiating element is dual-polarization radiating unit, and the radiation arm of dual-polarization radiating unit is arranged along ± 45 degree directions.
At above-mentioned a kind of directed earth station antenna for the empty wide-band communication system in ground, described radiating element is dual-polarization radiating unit, and the radiation arm of described dual-polarization radiating unit is arranged along the vertical-horizontal direction.
At above-mentioned a kind of directed earth station antenna for the empty wide-band communication system in ground, the radiation group is parallel equidistant arrangement in the horizontal direction, and the two ends of all described radiation groups align mutually, and the spacing between the adjacent radiation group is 0.4 to 0.7 centre frequency wavelength.
At above-mentioned a kind of directed earth station antenna for the empty wide-band communication system in ground, the radiation group is parallel equidistant arrangement in the horizontal direction, staggered in the vertical direction, and vertically spacing is the spacing between the adjacent radiation unit in 0.5 times of radiation group between the adjacent radiation group, and the spacing of along continuous straight runs is 0.25 to 0.7 centre frequency wavelength.
At above-mentioned a kind of directed earth station antenna for the empty wide-band communication system in ground, the elevation coverage that should upwards arrange by described adjustment support for the directed earth station antenna of the empty wide-band communication system in ground is 3 to 30 degree.
A kind of aligning method of the directed earth station antenna for the empty wide-band communication system in ground, it is characterized in that, concrete grammar is as follows: three sectors are set, and each sector is provided for the directed earth station antenna of the empty wide-band communication system in ground, three concyclic hearts in sector, and arrange in the annulus equal intervals of the concyclic heart, each sector rotates 120 degree and-120 degree respectively with respect to other two sectors, the radiating surface of antenna is towards described annulus outside, and the radius of described annulus is 1 to 6 meter.
At the aligning method of above-mentioned a kind of directed earth station antenna for the empty wide-band communication system in ground, each sector arranges a secondary directed earth station antenna that is used for the empty wide-band communication system in ground.
At the aligning method of above-mentioned a kind of directed earth station antenna for the empty wide-band communication system in ground, each sector arranges the directed earth station antenna that two width of cloth are used for the empty wide-band communication system in ground, and the adjacent antenna of every width of cloth antenna and adjacent sectors is parallel to each other.
The gain directional antenna of utilizing directed earth station antenna of the present invention realizes remote the covering, under the flying height of 8km, can reach the coverage distance of 200km; Arrange and figuration by particular array, in whole course line, can realize covering flatness preferably, reduce the interference to land mobile communication under the tower; By the antenna elevation angle adjustment, adjustable antenna coverage distance and middle part coverage effect; Arrange by broad beam directional diagram figuration and particular antenna, make directional antenna cover whole spatial domain scope, and effectively support spatial diversity or MIMO application.
Description of drawings
Fig. 1 is perspective view of the invention process.
Fig. 2 is the structural representation based on the directed earth station antenna of perpendicular polarization radiating element.
Fig. 3 is the structural representation based on the directed earth station antenna of ± 45 degree dual-polarization radiating units
Figure.
Fig. 4 is the structural representation based on the directed earth station antenna of vertical-horizontal dual-polarization radiating unit
Figure.
Fig. 5 is the structural representation of radiation group dislocation arrangement mode.
Fig. 6 is the schematic diagram of feeding network.
The schematic diagram that Fig. 7 covers the course line for directed earth station antenna of the present invention.
Fig. 8 is the vertical plane actual measurement directional diagram of directed earth station antenna of the present invention.
Fig. 9 is the horizontal plane actual measurement directional diagram of directed earth station antenna of the present invention.
Figure 10 is the perspective view of the arrangement mode embodiment 1 of directed earth station antenna of the present invention.
Figure 11 is the perspective view of the arrangement mode embodiment 2 of directed earth station antenna of the present invention.
Figure 12 is the plan structure schematic diagram of the arrangement mode embodiment 2 of directed earth station antenna of the present invention.
Embodiment
The present invention is described in detail below in conjunction with accompanying drawing, so that those skilled in the art can further understand above-mentioned purpose of the present invention, effect and structure.
Referring to Fig. 1 and Fig. 2, a kind of directed earth station antenna for the empty wide-band communication system in ground provided by the invention, comprise radiating element 1, reflecting plate 2, feeding network 3, radome 4, feed port 5, be used for adjusting the adjustment support 6 of antenna elevation angle, with the pole 7 of fixed antenna, radiating element 1, reflecting plate 2 and feeding network 3 are encapsulated in the inside of radome 4.
Referring to Fig. 2, the radiation function of antenna is realized by 1 group of battle array of radiating element.For elevation radiation patytern being realized accurately control, in the vertical direction by three above radiating elements 1 vertically linear array become a radiation group 9, all radiating element 1 placement directions are identical.Because in a zone, may there be many direction differences webbed course line that is interweaved, be subjected to nondistinctive covering in order to make all course lines, earth station antenna must have wide cone of coverage at horizontal plane.Directed earth station antenna of the present invention is arranged in a planar radiating curtain 10 by three radiation group 9 along continuous straight runs.
Fig. 2 is a kind of embodiment of described directed earth station antenna, and radiating element 1 adopts the perpendicular polarization radiating element.Because the used airborne antenna of passenger plane is generally vertical polarized antenna, so the perpendicular polarization earth station antenna can be complementary with the airborne antenna polarization.
Fig. 3 is another embodiment of described directed earth station antenna, and radiating element 1 adopts dual-polarization radiating unit, constitutes the directed earth station antenna of dual polarization.Because single width single polarization earth station antenna is not supported diversity or MIMO, behind the employing dual-polarization radiating unit, the described directed earth station antenna of single width can be supported polarization diversity or 2X2 MIMO.
Fig. 3 shows the embodiment 1 of the directed earth station antenna of described dual polarization, and the radiation arm of radiating element 1 is arranged along ± 45 degree directions.± 45 degree polarization earth station antennas have the loss of 3dB polarization mismatch with respect to airborne vertical polarized antenna, but the consistency of two polarization is better, and directly can support polarization diversity or 2X2 MIMO.
Fig. 4 shows the embodiment 2 of the directed earth station antenna of described dual polarization, and the radiation arm of radiating element 1 is arranged along the vertical-horizontal direction.The perpendicular polarization end does not have the polarization mismatch loss with respect to airborne vertical polarized antenna, but the loss of the airborne relatively vertical polarized antenna polarization mismatch of horizontal polarization end is infinitely great.Therefore this scheme needs to increase on the passenger plane horizontally-polarized antenna and could support 2X2 MIMO.
Referring to Fig. 2, Fig. 3 and Fig. 4, three radiation groups 9 are parallel in the horizontal direction equidistantly to be arranged in planar radiating curtain 10, and aligns mutually in the two ends of all described radiation groups.Spacing between the adjacent radiation group 9 is 0.4 to 0.7 centre frequency wavelength.
Referring to Fig. 5, radiation group 9 another arrangement mode is in the horizontal direction arranged for dislocation.The radiation group 92 on middle radiation group 91 relative both sides is vertically staggered, vertically spacing is the spacing between the adjacent radiation unit in 0.5 times of radiation group between the adjacent radiation group, and the spacing of along continuous straight runs is 0.25 to 0.7 centre frequency wavelength.This arrangement mode can reduce the lateral dimension of directed earth station antenna of the present invention.
Referring to Fig. 6, feeding network 3 divides plate 33 to form by radiation group feeding network 31, feeder cable 32 and merit, three radiation groups 9 are carried out feed by identical radiation group feeding network 31, three radiation groups 9 divide plate 33 to be connected with feeder cable 32 by merit, and merit divides plate 33 to be connected with feed port 5 by feeder cable 32.The length of the centre feed cable 321 of radiation group 91 is less than the length of the both sides feeder cable 322 that connects both sides radiation group 92 in the middle of connecting, and the length of the centre feed cable 322 of connection both sides radiation group 92 is identical.Centre feed cable 321 is than the centre frequency guide wavelength of both sides feeder cable 322 short 0.2 to 0.6 feeder cable.
Referring to Fig. 1, described directed earth station antenna for the empty wide-band communication system in ground installs and fixes and adjusts antenna elevation angle by adjusting support 6.Adjust support 6 by the fixed mount 61 that is fixed on radome 4 back sides and fixed mount 62, the last end support 63 that is connected with fixed mount 61, the following end support 64 that is connected with fixed mount 62, and be used for folder sign indicating number 65 compositions of fixed antenna on pole 7.Wherein descend end support 64 to comprise rotating shaft 641 and last turning arm 642 and following turning arm 643.Last turning arm 642 links to each other with fixed mount 62, and following turning arm 643 links to each other with folder sign indicating number 65, and two turning arms open one greater than the angle of zero degree, constitutes a V-arrangement that Open Side Down and adjusts support 66.Adjust the opening angle of support 66 by changing V-arrangement, elevation angle size that can control antenna.Directed earth station antenna of the present invention is adjusted coverage distance by adjusting antenna elevation angle, optimizes the middle part coverage effect.
By antenna array configuration of the present invention and feeding network setting, can obtain to meet the directional diagram of beechnut demand.Referring to Fig. 7, because the flying height of passenger plane is generally 6km to 12km, consider the coverage distance of 200km, then edge, overlay area aircraft to the angle a of the line of antenna and horizontal plane 5 spend in.Fig. 8 is the vertical plane actual measurement directional diagram of directed earth station antenna of the present invention.When directed earth station antenna of the present invention is vertically placed, the normal of the relative antenna surface of greatest irradiation direction of elevation radiation patytern has the inclination angle of 3 to 30 degree, for the greatest irradiation direction being aimed at the maximum position that covers, need by adjusting the elevation angle that support 6 upwards arranges one 3 to 30 degree.The inclination angle size of directional diagram has been taken all factors into consideration the middle part covering, disturb and the polarization mismatch loss bottom.When the directional diagram inclination angle was spent less than 3, the middle part coverage effect was relatively poor; And the directional diagram inclination angle is when spending greater than 30, and for the greatest irradiation direction being aimed at the edge, overlay area, antenna need raise the above elevation angle of 30 degree, and polarization mismatch loss meeting obviously increases.
Referring to Fig. 9, the directed earth station antenna for the empty wide-band communication system in ground of the present invention has the beamwidth of spending greater than 110 at horizontal plane, and more steady in whole beam area internal power distribution ratio.
Referring to Fig. 8, the directed earth station antenna for the empty wide-band communication system in ground of the present invention has downward inclination angle at vertical plane, for the greatest irradiation direction is aimed at the edge, overlay area, need antenna be adjusted upward an elevation angle by adjusting support 6.By array format of the present invention and feed method, when the fall off rate of elevation radiation patytern reduces one times at coverage distance decrease less than 6dB, thereby make in the whole coverage incoming level of airborne antenna more steady; Elevation radiation patytern does not have dark zero to fall on top, therefore problem such as can not occur going offline in the passenger traffic process; By suitable directional diagram inclination angle is set, the degree of depth zero that can make directional diagram avoid 90 degree places falls into, and covers thereby optimize the middle part; The energy of directional diagram bottom is less than top, and has a degree of depth zero to fall near near the greatest irradiation direction, therefore can significantly reduce directed earth station antenna to the interference of bottom land mobile communication.
A kind of aligning method of the directed earth station antenna for the empty wide-band communication system in ground is provided according to a second aspect of the invention.The described directed earth station antenna for the empty wide-band communication system in ground of three sectors is arranged in the annulus equal intervals, each sector rotates 120 degree and-120 degree respectively with respect to other two sectors, the radiating surface of antenna is towards described annulus outside, and the radius of described annulus is 1 to 6 meter.
Referring to Figure 10, the embodiment 1 of directed earth station antenna arrangement mode of the present invention is that each sector arranges a secondary described directed earth station antenna 11 for the empty wide-band communication system in ground.
Referring to Figure 11 and Figure 12, the embodiment 2 of directed earth station antenna arrangement mode of the present invention is that each sector arranges two described directed earth station antennas for the empty wide-band communication system in ground, and the directed earth station antenna 11 of every width of cloth is parallel to each other with the adjacent antenna radiating surface of adjacent sectors.Figure 11 shows concrete aligning method, and directed earth station antenna 111 is parallel with the adjacent antenna 112 of adjacent sectors, and each sector rotates 120 degree and-120 degree respectively with respect to other two sectors.This arrangement mode can be saved the antenna installing space, can realize the transmitting-receiving of antenna space diversity or MIMO again easily.
Owing to be distributed as net distribution in course line, compact district, course line, wish that therefore earth station antenna can evenly cover in the realization of whole overlay area, rather than the even covering of single sector.The present invention adopts the earth station antenna of three sectors to realize the even covering of whole overlay area.The directed earth station antenna of three sectors is formed an annular array, in the even covering of horizontal plane realization near omnidirectional; On vertical plane, behind every width of cloth antenna to directional diagram synthetic at the middle part, thereby further improve the effect that the middle part, zone covers.By this arrangement mode, be implemented in the even covering of whole website overlay area.
Although above the present invention is had been described in detail, the present invention is not limited thereto, and those skilled in the art of the present technique can carry out various modifications according to principle of the present invention.Therefore, all modifications of doing according to the principle of the invention all should be understood to fall into protection scope of the present invention.
Claims (12)
1. a directed earth station antenna that is used for the empty wide-band communication system in ground is characterized in that, comprises radome, reflecting plate, feeding network, the feed port that is connected with feeding network and is fixed for regulating the adjustment support of aerial angle with radome; Described reflecting plate is provided with some radiating elements; All radiating elements on feeding network, reflecting plate and the reflecting plate all are encapsulated in the radome; Wherein, at least three above radiating elements vertically linear array become a radiation group, three radiation group along continuous straight runs are arranged in a planar radiating curtain, all radiating elements are arranged on the reflecting plate along equidirectional, described feeding network is arranged on the below of reflecting plate, described adjustment support one end is fixed on the radome back side, and the other end is fixed on the described pole, and antenna upwards arranges one greater than the elevation angle of zero degree by described adjustment support.
2. a kind of directed earth station antenna for the empty wide-band communication system in ground according to claim 1, it is characterized in that, described adjustment support comprises two fixed mounts that are fixed on the described radome back side, the last end support that is connected with two fixed mounts and following end support, be used for the folder sign indicating number of fixed antenna on described pole, described end support down comprises a rotating shaft and two turning arms, described two turning arms open one greater than the angle of zero degree, constitute a V-arrangement and adjust support, described V-arrangement is adjusted support, and Open Side Down.
3. a kind of directed earth station antenna for the empty wide-band communication system in ground according to claim 1 is characterized in that, described feeding network comprises that radiation group feeding network, feeder cable and merit divide plate; Three radiation groups are carried out feed by identical radiation group feeding network, and three radiation groups divide plate to be connected with feeder cable by merit, and merit divides plate to be connected with feed port by feeder cable; The length of the centre feed cable of radiation group is less than the length of the both sides feeder cable that connects both sides radiation group in the middle of connecting, and the length of the both sides feeder cable of connection both sides radiation group is identical; The centre feed cable is than the centre frequency guide wavelength of short 0.2 to 0.6 feeder cable of both sides feeder cable.
4. a kind of directed earth station antenna for the empty wide-band communication system in ground according to claim 1 is characterized in that described radiating element is the perpendicular polarization radiating element.
5. a kind of directed earth station antenna for the empty wide-band communication system in ground according to claim 1 is characterized in that described radiating element is dual-polarization radiating unit, and the radiation arm of dual-polarization radiating unit is arranged along ± 45 degree directions.
6. a kind of directed earth station antenna for the empty wide-band communication system in ground according to claim 1 is characterized in that described radiating element is dual-polarization radiating unit, and the radiation arm of described dual-polarization radiating unit is arranged along the vertical-horizontal direction.
7. according to claim 4 or 5 or 6 described a kind of directed earth station antennas for the empty wide-band communication system in ground, it is characterized in that, the radiation group is parallel equidistant arrangement in the horizontal direction, and align mutually in the two ends of all described radiation groups, and the spacing between the adjacent radiation group is 0.4 to 0.7 centre frequency wavelength.
8. according to claim 4 or 5 or 6 described a kind of directed earth station antennas for the empty wide-band communication system in ground, it is characterized in that, the radiation group is parallel equidistant arrangement in the horizontal direction, staggered in the vertical direction, and vertically spacing is the spacing between the adjacent radiation unit in 0.5 times of radiation group between the adjacent radiation group, and the spacing of along continuous straight runs is 0.25 to 0.7 centre frequency wavelength.
9. the directed earth station antenna for the empty wide-band communication system in ground according to claim 1 is characterized in that, the elevation coverage that should upwards arrange by described adjustment support for the directed earth station antenna of the empty wide-band communication system in ground is 3 to 30 degree.
10. aligning method that is used for the directed earth station antenna of the empty wide-band communication system in ground, it is characterized in that, concrete grammar is as follows: three sectors are set, and each sector is provided for the directed earth station antenna of the empty wide-band communication system in ground, three concyclic hearts in sector, and arrange in the annulus equal intervals of the concyclic heart, each sector rotates 120 degree and-120 degree respectively with respect to other two sectors, the radiating surface of antenna is towards described annulus outside, and the radius of described annulus is 1 to 6 meter.
11. the aligning method of a kind of directed earth station antenna for the empty wide-band communication system in ground according to claim 10 is characterized in that each sector arranges a secondary directed earth station antenna that is used for the empty wide-band communication system in ground.
12. the aligning method of the directed earth station antenna for the empty wide-band communication system in ground according to claim 10, it is characterized in that, each sector arranges the directed earth station antenna that two width of cloth are used for the empty wide-band communication system in ground, and the adjacent antenna of every width of cloth antenna and adjacent sectors is parallel to each other.
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| CN105140617A (en) * | 2015-08-18 | 2015-12-09 | 江苏捷诚车载电子信息工程有限公司 | Antenna base turnover device |
| CN110719596A (en) * | 2019-09-19 | 2020-01-21 | 北京长焜科技有限公司 | Base station antenna design method for greatly improving ground-air communication signal coverage quality |
| CN113541743A (en) * | 2020-12-17 | 2021-10-22 | 中兴通讯股份有限公司 | Ground-to-air communication control method, antenna, base station and storage medium |
| WO2023051472A1 (en) * | 2021-09-30 | 2023-04-06 | 华为技术有限公司 | Antenna and base station antenna feeder system |
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| CN101320846A (en) * | 2008-06-24 | 2008-12-10 | 东南大学 | Substrate integration wave-guide multi-beam intelligent antenna |
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| CN110719596B (en) * | 2019-09-19 | 2022-07-12 | 北京长焜科技有限公司 | Base station antenna design method for greatly improving ground-air communication signal coverage quality |
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| WO2023051472A1 (en) * | 2021-09-30 | 2023-04-06 | 华为技术有限公司 | Antenna and base station antenna feeder system |
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| CN103346411B (en) | 2016-12-28 |
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