CN202405421U - Mobile communication system and multi-beam antenna device thereof - Google Patents
Mobile communication system and multi-beam antenna device thereof Download PDFInfo
- Publication number
- CN202405421U CN202405421U CN2011205091988U CN201120509198U CN202405421U CN 202405421 U CN202405421 U CN 202405421U CN 2011205091988 U CN2011205091988 U CN 2011205091988U CN 201120509198 U CN201120509198 U CN 201120509198U CN 202405421 U CN202405421 U CN 202405421U
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- antenna
- directional
- directional antenna
- antenna device
- rotary joint
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Abstract
A mobile communication system comprises a multi-beam antenna device and a floating platform, wherein the multi-beam antenna device comprises a columnar microwave rotating joint, a plurality of first directional antennas, a second directional antenna and an electric cable, the plurality of first directional antennas are arranged on the side wall of the microwave rotating joint, the first directional antennas are distributed at equal angles on a cross section of the side wall of the microwave rotating joint, and the second directional antenna is arranged at one end of the microwave rotating joint, so that the second directional antenna is perpendicular to the first directional antennas, and the first directional antennas and the second directional antenna are distributed on the microwave rotating joint and are electrically connected through the electric cable. The multi-beam antenna device is arranged on the floating platform and the second directional antenna is arranged towards the ground. Compared with mobile communication systems in prior art, the mobile communication system can provide stable, long-distance and all-around communication coverage in emergency. The mobile communication system and the multi-beam antenna device thereof are simple in structure, high in operability and easy to produce.
Description
Technical field
The utility model belongs to moving communicating field, relates to a kind of GSM and multi-beam antenna device thereof, is applied to the emergency communication field to realize comprehensive remote covering.
Background technology
In mobile communications network covered, antenna for base station was one of key equipment of overlay network, and distance that antenna for base station covers and capacity are the important indicators of weighing network performance.The base station is separated by a distance fixedly installing, and in the emergency communication of regional space, general at present employing Emergency communication vehicle, intercom or other means realize.But above-mentioned mode exists a major defect, and promptly coverage distance is very limited.When disaster took place, like earthquake, tsunami etc., the cellular basestation on ground possibly all damaged, and then can cause large-area communication disruption, and road traffic is paralysis simultaneously also, then can't use communications such as Emergency communication vehicle.
The utility model content
The shortcoming that the purpose of the utility model is to overcome prior art provides a kind of GSM and multi-beam antenna device thereof of remote covering with not enough.
The utility model is realized through following technical scheme: a kind of GSM comprises multi-beam antenna device and floating hollow panel.The multi-beam antenna device comprises the microwave rotary joint of a column, a plurality of first directional antenna, second directional antenna and cable; These a plurality of first directional antennas are arranged on the sidewall of this microwave rotary joint; And on cross section, being isogonism between each first directional antenna distributes; The end that this second directional antenna is arranged on this microwave rotary joint makes it vertical with each first directional antenna, and this first directional antenna and second directional antenna are electrically connected through cable with microwave rotary joint respectively.Said multi-beam antenna device is arranged on the floating hollow panel, and the direction towards ground of this second directional antenna is provided with.
Further, comprise three first directional antennas, be 120 degree angles between the first adjacent directional antenna and distribute.
And; A kind of multi-beam antenna device; Comprise the microwave rotary joint of a column, a plurality of first directional antenna, second directional antenna and cable; These a plurality of first directional antennas are arranged on the sidewall of this microwave rotary joint; And on cross section, be isogonism between each first directional antenna and distribute, the end that this second directional antenna is arranged on this microwave rotary joint makes it vertical with each first directional antenna, and this first directional antenna and second directional antenna are electrically connected through cable with microwave rotary joint respectively.
With respect to prior art, GSM that the utility model provides and multi-beam antenna device thereof can provide stable remote omnibearing communication to cover in case of emergency.This GSM and multi-beam antenna apparatus structure thereof are simple, workable, are easy to produce.
Description of drawings
Fig. 1 is the structural representation of the utility model GSM.
Fig. 2 is the structural representation of multi-beam antenna device 20 shown in Figure 1.
Fig. 3 is that the orientation of three first directional antennas 22 shown in Figure 2 covers sketch map.
Fig. 4 is that the half-power width of three first directional antennas shown in Figure 2 is about 65 ° sector coverage diagram.
Fig. 5 is that the half-power width of three first directional antennas shown in Figure 2 is about 90 ° sector coverage diagram.
Fig. 6 is that the space of aerial signal covers sketch map.
Covering when Fig. 7 is the high 1km of antenna holder receives signal schematic representation.
Embodiment
See also Fig. 1, it is the structural representation of the utility model GSM.This GSM comprises floating hollow panel 10 and is arranged on the multi-beam antenna device 20 on this floating hollow panel 10.
Please consult Fig. 2 simultaneously, it is the structural representation of multi-beam antenna device 20 shown in Figure 1.This multi-beam antenna device 20 comprises microwave rotary joint 21, first directional antenna 22, second directional antenna 23, jockey 24 and the cable 25 of column.In the present embodiment, this microwave rotary joint 21 is cylindrical, has three first directional antennas 22.These three first directional antennas are arranged on the sidewall of this microwave rotary joint 21 through jockey 24, and the angle between adjacent first directional antenna is 120 degree, are equal angles and distribute.This microwave rotary joint 21 can arbitrarily angled continuous rotation, and this first directional antenna 22 is rotated thereupon.This second directional antenna 23 is arranged on an end of this microwave rotary joint 21, and this second directional antenna is vertical with first directional antenna.Between this first directional antenna 22 and the microwave rotary joint 21, and this second directional antenna 23 and microwave rotary joint between be connected through cable 25, thereby realize that the signal between them transmits.Signal inputs to first directional antenna 22 and second directional antenna 23 through microwave rotary joint 21, covers through this first directional antenna 22 and 23 emissions of second directional antenna then.This first directional antenna 22 and second directional antenna 23 are dual polarization fixedly inferior horn antenna, electrical tilt antenna or single-polarized antenna.
The other end of this microwave rotary joint 21 is arranged on the floating hollow panel 10.Be suspended in the high-altitude when floating hollow panel 10, and the transmit direction that makes this second directional antenna 23 is vertically towards ground.See also Fig. 3, it is the covering schematic diagram of the GSM of the utility model.The signal of this first directional antenna 22 covers A1, A2, A3 sector region respectively, and the signal of this second directional antenna 23 has covered A1, A2, the regional blind spot region A4 of A3.
In order to realize comprehensive, the remote covering of signal, the GSM signal that below specifies the utility model transmits principle.
1) orientation of these three first directional antennas 22 covers.
See also Fig. 3, it is that the orientation of three first directional antennas 22 shown in Figure 2 covers sketch map.In theory, three first directional antennas should cover the sector of 120 degree scopes respectively.And in fact, first directional antenna 22 that covers each sector reaches the edge of covering when this sector greatest irradiation deviation in driction ± 60 °, crosses this edge and then need switch to adjacent sector work.The switching angular domain of greatest irradiation deviation in driction ± 60 ° in the sector, pattern levels should have one reasonably to descend.This be because; If it is too many that level descends, then cause coverage hole easily near the angular domain and stop communication switching, if level descends very little; Then near switching angular domain, be easy to generate overlapping covering, cause the adjacent sectors interference to increase and make receiving error rate rising.Draw according to theoretical simulation and Analysis of application result, the switching angular domain level in greatest irradiation deviation in driction ± 60 ° drops to-6dB for good, wherein, drops to the-10dB-during 10dB for best.Owing to adopt half-power width to weigh antenna beamwidth, according to Principle of Antenna, drop at level-during 10dB, the half-power width of this antenna is about 65 °, and its overlay area is as shown in Figure 4; Drop at level-during 6dB, the half-power width of this antenna is about 90 °, and its overlay area is as shown in Figure 5.Can find out thus, be that 65 ° antenna has obtained better orientation coverage effect at half-power width.If this first directional antenna 22 is a dual polarized antenna, then adopt the polarization diversity form, wherein; Two mutually orthogonal signals that polarize are uncorrelated mutually, are connected in the receiver of input more than, through suitable vector calculus; Select best reception signal or composite signal; Improve receiving gain 3～5dB, thereby reach the purpose of antagonism multipath fading, can obtain good diversity.
2) distance of this first directional antenna 22 covers.
Mainly by factors such as elevation radiation patytern characteristic, antenna installation height H, coverage distance R and downwards bevel beam angle θ decisions, when requiring to realize farthest coverage distance, need take into account solutions " tower is deceived down " problem apart from coverage effect.
See also Fig. 6, it is the space covering sketch map of aerial signal.At first analyze the restriction relation between antenna height H, coverage distance R and the angle of declination θ three; Wherein, the antenna height H of this first directional antenna 22 is 0.5～2km, and ground covering radius R is 0～20km; Set the greatest irradiation direction of this first directional antenna 22 and point to covering 6km place; According to θ=arctan (H/R), downwards bevel beam angle θ ∈ (arctan (0.5/6)～arctan (2/6)) then, promptly 4.8 °～18.5 °.
According to Principle of Antenna and network optimization in early stage experience; For guaranteeing the polarization purity and the coverage effect of antenna; The antenna beam angle of declination should be no more than 20 °, and sets up difficulty and stability for reducing antenna system, avoids the use of following hectare of machinery as far as possible; Therefore antenna is hung height and is no more than 2km, and the floating hollow panel 10 that promptly carries this multi-beam antenna device should be arranged on the high-altitude that is no more than 2km apart from ground.
Further; When being set in the space loss maximum, first directional antenna 22 is hung high 0.5～2km, and these first directional antenna, 22 greatest irradiation directions are pointed to the 6km place; Do not considering under the factors such as multipath reflection; Suppose at beam axis to use the antenna reception of gain as Gr at a distance of the place of d, received signal power can be expressed as:
P
r＝P
tG
tG
r(λ/4πd)
2 (1)
P in the formula (1)
tBe the antenna transmitting power, λ is a wavelength, then free-space loss L
pCan be expressed as:
L
p＝(4πd/λ)
2 (2)
Usually with L
pBe expressed as
L
p(dB)＝32.44+20lgd(km)+20lgf(MHz) (3)
F is a frequency in the formula (3).
According to the engineering experience formula:
L
s=L
p+ L
Revise=32.44+20lgf+20lgd+18 (4)
In the budget of real CS12.2k service uplink:
L
p=transmitting power-receiving sensitivity+antenna gain-human body loss-line loss-interference
Surplus-power control surplus-shadow fading surplus-bad weather surplus
＝21-(-126.44)+Gi-3-0.5-3-2-4.2-2＝132.74+Gi(dB)
Be that the gain of antenna is satisfied formula (5) and got final product:
18+32.44+20lg(1952.5)+20lgd＜132.74+Gi(dB)(5)
According to the covering space of formula (5) combination antenna pattern and Fig. 6, calculate the relation of (km) of incoming level (dBm) and coverage distance, as long as incoming level promptly can reach the purpose of covering greater than receiving sensitivity.
See also Fig. 7, the covering when it shows the high 1km of antenna holder receives signal(l)ing condition.
3) covering of the 4th sector.
For the antenna system in the anxious communication system, realize that the maximum difficult point that covers continuously is " tower is black down " problem.Under equal conditions, the wide more antenna of half-power beam width of the vertical plane on relative ground, because of its tower lower area quantity at zero point is few more, level value is big more, is beneficial to solution " tower is black down " problem more, the wide antenna that low gain then need be set of wave beam.Be head it off, in the present embodiment, this second directional antenna 23 antenna that is set to gain for 9dBi, and make its radiation direction perpendicular to ground, solve the problem of " tower is black down ".
With respect to prior art, the GSM that the utility model provides can provide stable remote omnibearing communication to cover in case of emergency.This GSM and multi-beam antenna apparatus structure thereof are simple, workable, are easy to produce.
The utility model is not limited to above-mentioned execution mode; If the various changes of the utility model or distortion are not broken away from the spirit and the scope of the utility model; If these changes and distortion belong within the claim and equivalent technologies scope of the utility model, then the utility model also is intended to comprise these changes and distortion.
Claims (10)
1. multi-beam antenna device; It is characterized in that: comprise the microwave rotary joint of a column, a plurality of first directional antenna, second directional antenna and cable; These a plurality of first directional antennas are arranged on the sidewall of this microwave rotary joint; And on cross section, being isogonism between each first directional antenna distributes; The end that this second directional antenna is arranged on this microwave rotary joint makes it vertical with each first directional antenna, and this first directional antenna and second directional antenna are electrically connected through cable with microwave rotary joint respectively.
2. multi-beam antenna device according to claim 1 is characterized in that: comprise three first directional antennas, be 120 degree angles between the first adjacent directional antenna and distribute.
3. multi-beam antenna device according to claim 1 and 2 is characterized in that: this microwave rotary joint is cylindric.
4. multi-beam antenna device according to claim 1 and 2 is characterized in that: also comprise jockey, this first directional antenna is arranged on this microwave rotary joint through this jockey.
5. multi-beam antenna device according to claim 3 is characterized in that: the horizontal plane lobe width of this first directional antenna is 65 degree or 90 degree.
6. multi-beam antenna device according to claim 4 is characterized in that: this first directional antenna and second directional antenna are fixedly inferior horn antenna, electrical tilt antenna or single-polarized antenna of dual polarization.
7. GSM is characterized in that: comprise multi-beam antenna device as claimed in claim 1 and floating hollow panel, said multi-beam antenna device is arranged on the floating hollow panel, and the direction towards ground of this second directional antenna is provided with.
8. GSM according to claim 7 is characterized in that: this multi-beam antenna device comprises three first directional antennas, is 120 degree angles between the first adjacent directional antenna and distributes.
9. GSM according to claim 8 is characterized in that: this floating hollow panel is arranged on the high-altitude that is no more than 2km apart from ground.
10. GSM according to claim 9 is characterized in that: the horizontal plane lobe width of this first directional antenna is 65 degree or 90 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205091988U CN202405421U (en) | 2011-12-08 | 2011-12-08 | Mobile communication system and multi-beam antenna device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205091988U CN202405421U (en) | 2011-12-08 | 2011-12-08 | Mobile communication system and multi-beam antenna device thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202405421U true CN202405421U (en) | 2012-08-29 |
Family
ID=46703048
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205091988U Expired - Lifetime CN202405421U (en) | 2011-12-08 | 2011-12-08 | Mobile communication system and multi-beam antenna device thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202405421U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103165984A (en) * | 2011-12-08 | 2013-06-19 | 京信通信系统（中国）有限公司 | Mobile communication system and multi-beam antenna device thereof |
| CN105103463A (en) * | 2013-04-10 | 2015-11-25 | Lg电子株式会社 | Layer alignment method and apparatus for multilayer three-dimensional beamforming in wireless communication system |
| WO2017185554A1 (en) * | 2016-04-28 | 2017-11-02 | 深圳市道通智能航空技术有限公司 | Unmanned aerial vehicle |
-
2011
- 2011-12-08 CN CN2011205091988U patent/CN202405421U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103165984A (en) * | 2011-12-08 | 2013-06-19 | 京信通信系统（中国）有限公司 | Mobile communication system and multi-beam antenna device thereof |
| CN103165984B (en) * | 2011-12-08 | 2016-10-05 | 京信通信系统（中国）有限公司 | A kind of mobile communication system and Multi-beam antenna apparatus thereof |
| CN105103463A (en) * | 2013-04-10 | 2015-11-25 | Lg电子株式会社 | Layer alignment method and apparatus for multilayer three-dimensional beamforming in wireless communication system |
| CN105103463B (en) * | 2013-04-10 | 2018-08-17 | Lg电子株式会社 | Layer alignment schemes and equipment for the multi-layer three-dimension beam forming in wireless communication system |
| WO2017185554A1 (en) * | 2016-04-28 | 2017-11-02 | 深圳市道通智能航空技术有限公司 | Unmanned aerial vehicle |
| US10707564B2 (en) | 2016-04-28 | 2020-07-07 | Autel Robotics Co., Ltd. | Unmanned aerial vehicle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120829 Effective date of abandoning: 20161005 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |