CN2730033Y - Omnidirectional intelligent antenna of wireless local telephone PHS communication system - Google Patents
Omnidirectional intelligent antenna of wireless local telephone PHS communication system Download PDFInfo
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- CN2730033Y CN2730033Y CN 200420041838 CN200420041838U CN2730033Y CN 2730033 Y CN2730033 Y CN 2730033Y CN 200420041838 CN200420041838 CN 200420041838 CN 200420041838 U CN200420041838 U CN 200420041838U CN 2730033 Y CN2730033 Y CN 2730033Y
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Abstract
The utility model relates to an omnidirectional intelligent antenna with polarization diversity for a PHS communication system of a wireless local telephone. Three polarized-sector six-array antennas of +/-45 DEG (5, 6) and active control units such as an amplitude phase controller (1), a power amplifier (3), etc. are integrated into a whole. The six-array antenna adopts three-surface polarized-sector array directional antenna of +/-45 DEG; three polarized-sector array antennas of +45 DEG (6) receive up signals and obtain; high-gain omnidirectional polarized diversity by controlling amplitude and phase; then, up gain is increased after power amplifier to keep the balance of up and down links. Three polarized-sector array antennas (5) of-45 DEG realize the bidirectional functions of receiving up signals and transmitting down signals; when receiving signals, the three polarized-sector array antennas (5) of-45 DEG are matched with the three polarized-sector array antennas of +45 DEG (6) to receive the signals; when the utility model transmits signals, after the down power of the base station is amplified and the amplitude phase controller controls the amplitude and the phase, the signals are assigned to the three-array directional antennas to be forwarded to form omnidirectional transmitting coverage. The utility model has the advantages that the utility model has simple structure and low cost and can upgrade a 10 mw base station into a 50 mw base station.
Description
Technical field
The utility model relates to antenna for base station, the polarization diversity omnidirectional intelligent aerial that especially a kind of Personal Handyphone System PHS communication system base station is used.
Background technology
Along with developing rapidly of global mobile communication business, number of users is in continuous increase, and professional type is also more and more diversified, thereby frequency resource has become the matter of utmost importance that solves the Communication Development bottleneck.At present, the technological means that addresses this problem has two kinds, a kind of means are to optimize the mobile network by increasing spectral bandwidth and base station and number of cells, improve the network coverage and capacity, but drop into huge, the interference problem of bringing is also more outstanding, and the frequency resource of expansion is very limited.Second kind of means is by intelligent antenna technology extension frequency resource, this means are to solve effectively stimulating the menstrual flow of frequency problem, show great attention to countries in the world government, capital equipment manufacturer and operation commercial city, and drop into great amount of manpower and material resources and ability is studied.The 3G (Third Generation) Moblie normal structure has realized that the important function of smart antenna aspect the reduction network interferences, in 3-G (Generation Three mobile communication system), wide band code division multiplex (MUX) access WCDMA and the standard formulation that is applied to a kind of wideband CDMA technology cdma2000 of 3G have taken into full account compatible intelligent antenna technology, support the clause of intelligent antenna technology to occur, and intelligent antenna technology one of the core technology of the another one standard TD SDMA TD-SCDMA of 3-G (Generation Three mobile communication system) especially, visible smart antenna has become the important component part of 3G.But, rather than, therefore be difficult to directly apply to original base station system as an auxiliary equipment after the system design well owing to smart antenna must design with system.In order to overcome above-mentioned shortcoming, released the product of a kind of being called " duplex tower top amplifier " on the market.It seals in one " bilateral amplifier " at former antenna for base station root, and descending base station transmit signals is carried out power amplification, and up base station received signal is carried out " low noise amplification ", to improve the Signal to Interference plus Noise Ratio of base station system, enlarges effective covering of base station.But owing to be subjected to " low noise amplifier " to improve the restriction of degree, usually reduce system noise 1～2dB only, thereby increase " duplex tower top amplifier ", though increased descending covering, up improvement is very little, the base station is effectively covered increase not obvious, and it is up and down link is asymmetric, Personal Handyphone System system particularly, because of its mobile phone power 10mw only, " duplex tower top amplifier " more falls flat.
The utility model content
The purpose of this utility model is to overcome the deficiency of above-mentioned duplex tower top amplifier formula antenna for base station, providing a kind of is not changing original Personal Handyphone System PHS base station and is still using on the basis of 10mw small-power mobile phone, can improve the up-downgoing gain of original base station, enlarge the Personal Handyphone System PHS communication system omnidirectional intelligent aerial of the polarization diversity of original base station range, make the little upgrading base station of Personal Handyphone System PHS, reach the coverage effect of the big base station of 500MW.
Realize that the utility model purpose technical thought is " tower amplifier " design philosophy that does not change former architecture of base station, only former antenna for base station is replaced by polarization diversity omnidirectional intelligent aerial of the present utility model.Based on time-division system, the active part of smart antenna obtains the transmitting-receiving control signal from the transmission signal of former base station, can guarantee to stand erectly with original hase to connect the synchronizing characteristics that links to each other, and realizes the upgrading to little base station; Utilize the array antenna principle of the input of a plurality of radio frequencies, delivery outlet of smart antenna and directional antenna than the high characteristics of omnidirectional antenna gain, design a kind of novel intelligent antenna that can improve base station range.Its technical scheme is reception antenna to be covered to change into by three ± 45 ° polarization sector six array antennas combinations by original omnidirectional antenna cover, the associating reception, and amplitude and phase place by the array of controls antenna, reach high-gain omnidirectional polarization diversity usefulness, increase the up link receiving gain, keep the balance of uplink and downlink link.One of its technical characterictic is that three ± 45 ° polarization sector six array antennas and active control unit are integrated as a whole, reduce the loss of feeder line, reduce and receive noise factor, improve snr of received signal, this active control unit is made up of width of cloth phase controller, transmitting-receiving isolator, power amplifier and DC power supply.Two of characteristics are to adopt three ± 45 ° polarization sector six array directional antennas, form and receive omnidirectional's covering, wherein, three+45 ° polarization sector tri-array antennas are used to finish upward signal and receive, the upward signal that is about to receive, after carrying out the synthetic and selectivity polarization diversity of omnidirectional and receive by width of cloth phase controller, the ingoing power amplifier amplifies, and is input to the base station again; Three-45 ° polarization sector tri-array antennas are used to finish upward signal reception and downstream signal emission two-way function, unite reception with+45 ° of polarization tri-array antennas during up reception, and with the upward signal that receives, after carrying out the synthetic and selectivity polarization diversity of omnidirectional and receive by another width of cloth phase controller, after amplifying, transmitting-receiving isolator ingoing power amplifier is input to the base station again; During downlink, after by power amplifier the 10MW descending power of former base station being amplified, via the transmitting-receiving isolator, be assigned to three-45 ° of array directional antennas by width of cloth phase controller, the descending forwarding of sub-sequence on time forms emission omnidirectional and covers.
The utility model has tangible advantage compared with the prior art:
1. compare with the PHS passive antenna that generally uses at present,, replace former spatial polarizations diversity, dwindled antenna space greatly and taken volume because the up polarization diversity processing array antenna that utilizes is done omnidirectional's covering; Because descending employing selectivity is amplified, guaranteed the up-downgoing balance of transmission channel simultaneously, and downstream signal only uses a control channel can realize that omnidirectional covers.
With the traditional intelligence antenna ratio, omitted the hardware device of large amount of complex; Do not need to carry out complicated signal processing; Omitted calibrate, with low cost.
3. with traditional " duplex tower top amplifier " comparison, overcome " duplex tower top amplifier " and only relied on the noise factor that improves the reception noise amplifier limitedly, can not remedy because mobile phone power is little, up effective covering increases unconspicuous problem; Increased the gain of up link, guaranteed upper and lower shape link balance, made little base station reach effective covering of big base station.
By showing to the Personal Handyphone System 10mW base station of using the utility model smart antenna with to the fixed test contrast of the 500mW base station of using common antenna, use its coverage effect of 10mW base station of the utility model smart antenna to be better than the effect that common antenna is used in the 500mW base station, its data are as shown in the table:
| Classification | The strong coverage rate of high field | The strong coverage rate of inferior high field | Coverage distance greater than 40dB μ V |
| The common antenna in 500mw base station | 91.18％ | 71.57％ | 782 meters |
| The 10mw base station intelligent antenna | 99.31％ | 89.58％ | 822 meters |
Description of drawings
Fig. 1 is a schematic diagram of the present utility model
Fig. 2 is overall structure figure of the present utility model
Fig. 3 is the outline drawing of an embodiment of the present utility model
Fig. 4 is a horizontal directivity pattern of the present utility model
Embodiment
Followingly further specify structure of the present utility model and effect with reference to accompanying drawing
With reference to Fig. 1, the utility model is made up of following five parts:
1. array antenna 5,6
The dual polarization sector six array directional antennas that this array antenna is made up of three ± 45 ° polarisation unit, wherein:
Three array directional antennas 5 of-45 ° of polarization sectors are two-way uses, and sub-sequence carries out downlink to the signal after amplifying and upward signal is received on time;
Three array directional antennas 6 of+45 ° of polarization sectors are used for upward signal is received.
2. width of cloth phase controller 1
This width of cloth phase controller is finished amplitude and the phase control to the uplink and downlink signal.Receive omnidirectional's covering because the utility model adopts three sector dual polarization six array antennas to be combined to form, so width of cloth phase controller is made as by ± 45 ° of corresponding respectively two of connecting of polarization array directional antenna, each width of cloth phase controller is divided into three the tunnel and imports.
3. power amplifier 3
This power amplifier is mainly finished three kinds of functions, and the one, from the forward signal of base station, extract the transmitting-receiving control signal; The 2nd, the downstream signal of base station is carried out power amplification; The 3rd, the up weak signal that receives is carried out low noise amplify.
4. receive and dispatch isolator 2
This transmitting-receiving isolator is mainly used in isolates the receiving and transmitting signal of three array antennas of-45 ° of polarization of two-way use, and promptly firing cadence isolates transmitting from received signal during reception.
5. DC power supply 4
It is the direct voltage that each circuit uses in the system that this power supply is mainly finished the alternating current of the 220V of input or dc voltage conversion that far-end provides.
The annexation and the operation principle of above-mentioned each parts are as follows:
Three array directional antennas 5 of-45 ° of polarization sectors and the width of cloth controller 1, transmitting-receiving isolator 2, power amplifier 3 mutually are connected successively with DC power supply 3, wherein, receive and dispatch isolator 2 respectively with the width of cloth controller 1 and 3 two-way connections of power amplifier mutually.Three array directional antennas 6 of+45 ° of polarization sectors are connected with power amplifier 3 by another width of cloth phase controller 1.
During reception, dual polarization six array antennas are worked simultaneously, unite the reception upward signal.Three+45 ° polarization sector array directional antennas 6 will receive the upward signal of being sent by mobile phone, carrying out omnidirectional by width of cloth phase controller 1 synthesizes, and after the signal that receives carried out selectivity polarization diversity and receive, be input to power amplifier 3 and amplify, be input to the base station then.Three-45 ° polarization sector array antennas 5 also will receive the upward signal of being sent by mobile phone, being input to another width of cloth phase controller 1, to carry out omnidirectional synthetic, and after the signal that receives carried out selectivity polarization diversity and receives, be input to power amplifier 3 by transmitting-receiving isolator 2 and amplify, be input to the base station then.
During emission, just three-45 ° polarization sector array antennas, 5 work.After power amplifier 3 carries out power amplification to the downstream signal of little base station chronologically, be sent to width of cloth phase controller 1 by transmitting-receiving isolator 2, by width of cloth phase controller it is assigned to three-45 ° polarization sector array directional antennas, descending again forwarding, utilize the high-gain of directional antenna itself to form the theaomni-directional transmission covering, make mobile phone can receive the descending strong signal that transmit the base station in different azimuth.
With reference to Fig. 2, dual polarization of the present utility model sector six array antennas are that three array directional antennas are connected into an integral body, fixing two arrays that constitute by ± 45 ° of poliarizing antenna unit 8 on each face, all active control units are arranged on this whole clear position, formation integrates the antenna structure of active control unit and three sector dual polarization sector array, receive noise factor to reduce the loss of feeder line, to reduce, improved snr of received signal.Described one antenna structure upper end is fixed with lightning arrester 7, and radio frequency feed line 9 and power line 10 are drawn from power amplifier and DC power supply respectively in the lower end.Described one antenna structure outside is with radome 11, constitutes the antenna product of a profile sealing, as shown in Figure 3.As long as two radio frequency feed lines 9 directly are connected with the base station, plugging in gets final product during installation.
With reference to Fig. 4, the utility model is 192.000MHZ at test frequency, and maximum is-21.42db 57.00 °; Lobe width-3.00dB, 170.00 °; Before and after than being-3.73dB, under-150.00 ° the condition, the horizontal direction deviation in roundness of being tested has reached omnidirectional's characteristic preferably less than ± 2.5dB.
Claims (3)
1. the Personal Handyphone System PHS communication system omnidirectional intelligent aerial of a polarization diversity is characterized in that: with three ± 45 ° polarization sector six array antennas and the width of cloth mutually controller (1), to receive and dispatch isolator (2), power amplifier (3), power supply (4) integrated as a whole; Described six array antennas adopt three ± 45 ° polarization sector six array directional antennas, wherein:
The upward signal that three+45 ° polarization sector array antennas (6) are about to receive, after carrying out the synthetic and selectivity polarization diversity of omnidirectional and receive by width of cloth phase controller (1), obtain high-gain omnidirectional polarization diversity usefulness, ingoing power amplifier (3) is input to the base station after amplifying again, finishes upward signal and receives;
Three-45 ° polarization sector array antennas (5) carry out the upward signal reception respectively and downstream signal is transmitted, when receiving upward signal, unite reception with three+45 ° polarization sector array antennas (6), and with the upward signal that receives, after carrying out the synthetic and selectivity polarization diversity of omnidirectional and receive by another width of cloth phase controller (1), after amplifying, transmitting-receiving isolator (2) ingoing power amplifier (3) is input to the base station again; When converting downlink signal, after power amplifier (3) the descending power amplification to base station chronologically, enter width of cloth phase controller (1) through transmitting-receiving isolator (2) and be assigned to three descending forwardings of array directional antenna, form theaomni-directional transmission and cover.
2. omnidirectional intelligent aerial according to claim 1, it is characterized in that width of cloth phase controller (1), be made as corresponding two, each width of cloth phase controller is divided into three tunnel inputs, be connected with three-45 ° polarization sector array antennas with three+45 ° polarization sector array antennas respectively, finish the width of cloth of uplink and downlink signal is controlled mutually.
3. omnidirectional intelligent aerial according to claim 1, it is characterized in that receiving and dispatching isolator (2) respectively with the width of cloth controller (1) and two-way connection of power amplifier (3) mutually, the receiving and transmitting signal that is used to control three array antennas of right-45 ° of polarization sectors is isolated, promptly at firing cadence from received signal, isolate transmitting during reception.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 200420041838 CN2730033Y (en) | 2004-04-26 | 2004-04-26 | Omnidirectional intelligent antenna of wireless local telephone PHS communication system |
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|---|---|---|---|
| CN 200420041838 CN2730033Y (en) | 2004-04-26 | 2004-04-26 | Omnidirectional intelligent antenna of wireless local telephone PHS communication system |
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| CN2730033Y true CN2730033Y (en) | 2005-09-28 |
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