CN101916918A - Automatically polarized adjustment antenna system and polarization calibration method thereof - Google Patents
Automatically polarized adjustment antenna system and polarization calibration method thereof Download PDFInfo
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- CN101916918A CN101916918A CN2010102141398A CN201010214139A CN101916918A CN 101916918 A CN101916918 A CN 101916918A CN 2010102141398 A CN2010102141398 A CN 2010102141398A CN 201010214139 A CN201010214139 A CN 201010214139A CN 101916918 A CN101916918 A CN 101916918A
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Abstract
The invention discloses an automatically polarized adjustment antenna system and a polarization calibration method thereof, and relates to an antenna device with the polarization adjustment function in the field of communication. The automatically polarized adjustment antenna system comprises a horizontally polarized antenna, a vertically polarized antenna, an automatically polarized adjustment module, a polarized control circuit and the like. The automatically polarized adjustment module consists of a first amplifier, a second amplifier and a matching circuit thereof, a first numerical control phase shifter, a second numerical control phase shifter, a first numerical control attenuator, a second numerical control attenuator and a combiner/a divider. In the invention, the function of automatically polarized adjustment is realized by a method for automatically adjusting the proportion of an orthogonal two-wire polarization unit; and the process of polarization calibration is finished by an automatic calibrating method. The method has the advantages of high adjusting speed, capacity of realizing constant adjustment, good adjustment effect, no change of the profile of the antenna and the like. The automatically polarized adjustment antenna system and the polarization calibration method thereof are suitable for manufacturing the antenna with the polarized adjustment function in a satellite communication system or other communication systems, particularly for the low profile satellite communication antenna of a moving carrier.
Description
Technical field
The present invention relates to a kind of antenna technology in the communications field, be applicable to make to have antenna system and the polarization calibration steps thereof that function is adjusted in polarization in satellite communication or other communication system.
Background technology
The antenna of adjusting that polarizes that uses in communication system at present has following several form, though characteristics are respectively arranged on performance, all has certain deficiency.
1, utilize the mode of mechanical rotation antenna or antenna feed, can realize manual or electronic polarization adjustment, but major defect has: adopt the mode of mechanical rotation, it is slow to regulate the speed; If antenna is an array format, then need entire antenna is rotated, increase the complexity of antenna structure, and when antenna when polaxis rotates, may cause the increase of antenna height.
2, utilize the mode of rotating the feed waveguide direction, can realize manual or electronic polarization adjustment, but major defect has: this method still adopts the mode of mechanical rotation, and it is slow to regulate the speed; This method only is fit to the circular aperture horn antenna of waveguide form feed and with the reflector antenna of circular aperture loudspeaker as feed, the antenna of other form can't adopt this mode.
Summary of the invention
The objective of the invention is to avoid the weak point in the above-mentioned background technology and provide a kind of automatic Polarization to adjust antenna system and polarization calibration steps thereof.The present invention adopts the method for automatic adjustment Orthogonal Double linear polarization element amplitude ratio to finish automatic Polarization and adjusts function, and adopts automatic calibrating method to finish the polarization calibration process.This method has to regulate the speed and can realize adjusting constantly, adjusting effective, as not change antenna advantages such as profile soon, be applicable to make to have the antenna that function is adjusted in polarization in satellite communication or other communication system, be specially adapted to the low profile satellite communication antena of mobile vehicle.
A kind of automatic Polarization is adjusted antenna system, and described antenna is a reception antenna, comprises horizontally-polarized antenna and vertical polarized antenna, also comprises automatic Polarization adjusting module and polarization control circuit; Two input ports of described automatic Polarization adjusting module are connected with vertical polarized antenna with horizontally-polarized antenna with radio frequency cable respectively, the output port of automatic Polarization adjusting module is connected with external receiving equipment, is used for adjusting automatically the amplitude-phase relation between horizontal polarization signal and the perpendicular polarization signal, the adjustment of realization automatic Polarization; The polarization control circuit is connected with the automatic Polarization adjusting module, is used for amplitude and phase place according to control command control polarization adjusting module.Wherein, described automatic Polarization adjusting module is made up of first, second amplifier and match circuit thereof, first, second digital phase shifter, first, second numerical-control attenuator, mixer; The input port of first, second amplifier and match circuit thereof connects the output port of horizontally-polarized antenna and vertical polarized antenna respectively, the output port of first, second amplifier and match circuit thereof is connected in series the input port of first, second digital phase shifter respectively, so use amplifying signal; The output port of first, second digital phase shifter is connected in series the input port of first, second numerical-control attenuator respectively, so with signal is carried out phase shift; The input port of the output port serial connection mixer of first, second numerical-control attenuator is used for signal is decayed; The output port of mixer is connected with external receiving equipment.
A kind of automatic Polarization is adjusted antenna system, and described antenna is a transmitting antenna, comprises horizontally-polarized antenna and vertical polarized antenna, also comprises automatic Polarization adjusting module and polarization control circuit; Two output ports of described automatic Polarization adjusting module are connected with vertical polarized antenna with horizontally-polarized antenna with radio frequency cable respectively, the input port of automatic Polarization adjusting module is connected with external receiving equipment, is used for adjusting automatically the amplitude-phase relation between horizontal polarization signal and the perpendicular polarization signal, the adjustment of realization automatic Polarization; The polarization control circuit is connected with the automatic Polarization adjusting module, is used for amplitude and phase place according to control command control polarization adjusting module.Wherein, described automatic Polarization adjusting module is made up of first, second amplifier and match circuit thereof, first, second digital phase shifter, first, second numerical-control attenuator, splitter; The output port of first, second amplifier and match circuit thereof connects the input port of horizontally-polarized antenna and vertical polarized antenna respectively, the input port of first, second amplifier and match circuit thereof is connected in series the output port of first, second digital phase shifter respectively, so use amplifying signal; The input port of first, second digital phase shifter is connected in series the output port of first, second numerical-control attenuator respectively, so with signal is carried out phase shift; The output port of the input port serial connection splitter of first, second numerical-control attenuator is used for signal is decayed; The input port of splitter is connected with external receiving equipment.
A kind of automatic Polarization is adjusted the polarization calibration steps of antenna system, described antenna is a reception antenna, form by horizontally-polarized antenna and vertical polarized antenna, mainly realize by means of the automatic Polarization calibration system, described automatic Polarization calibration system comprises the antenna of the calibration of waiting to polarize, test table, spectrum analyzer, interface convertor, computer, beacon antenna, the polarization whirligig, signal source and beacon tower, computer is by interface convertor control first in the antenna of calibration of waiting to polarize, second digital phase shifter and first, second numerical-control attenuator, read the power level value of spectrum analyzer simultaneously by interface convertor, the realization automatic Polarization is adjusted, and comprises step:
1, beacon antenna is rotated to a certain angle θ, with the antenna normal alignment beacon antenna received signal of waiting to polarize and calibrate, signal source transmits and sends by beacon antenna;
2, phase shifter in the automatic Polarization adjusting module and attenuator all are arranged on 0 ° or 0dB state, when writing down independent horizontally-polarized antenna and using vertical polarized antenna as reception antenna separately with spectrum analyzer mensuration and with computer respectively, the incoming level value of automatic Polarization adjusting module output port;
3, adjust first, second numerical-control attenuator, the level of the received signal of horizontally-polarized antenna and vertical polarized antenna is adjusted consistent, adjusting afterwards, the value of first, second numerical-control attenuator is respectively A1 and A2;
4, change the value of second digital phase shifter, measure the incoming level value of automatic Polarization adjusting module output port, the phase value φ 0 when the recorder level value reaches maximum;
5, the phase value of second digital phase shifter is arranged to φ=φ 0+180 °, the level value C (dBm of unit) of record automatic Polarization adjusting module output port, cross polarization level when this value (is got negative sign when the θ＞0, get positive sign when θ＜0) in θ ± 90 ° for polarizing angle;
6, with the beacon antenna half-twist, promptly forward ° position, θ ± 90 to, the phase value of second digital phase shifter still is φ=φ 0+180 °, the level value of record automatic Polarization adjusting module (3) output port, be main pole level M (dBm of unit) this moment;
When 7, the polarizing angle that obtains of record is θ ± 90 °, first, second numerical-control attenuator and the second digital phase shifter respective value A1, A2 and φ, promptly these devices in automatic Polarization adjusting module this moment are adjusted to this state, the antenna 10 of calibration of waiting to polarize just forms the polarized state of θ ± 90 ° direction, and this moment, the cross polarization isolation of this antenna was: M-C (dB).
A kind of automatic Polarization is adjusted the polarization calibration steps of antenna system, described antenna is a transmitting antenna, form by horizontally-polarized antenna and vertical polarized antenna, mainly realize by means of the automatic Polarization calibration system, described automatic Polarization calibration system comprises the antenna of the calibration of waiting to polarize, test table, spectrum analyzer, interface convertor, computer, beacon antenna, the polarization whirligig, signal source and beacon tower, computer is by interface convertor control first in the antenna of calibration of waiting to polarize, second digital phase shifter and first, second numerical-control attenuator, read the power level value of spectrum analyzer simultaneously by interface convertor, the realization automatic Polarization is adjusted, and comprises step:
1, beacon antenna is rotated to a certain angle θ, the antenna normal alignment beacon antenna of the calibration of waiting to polarize is transmitted, the beacon antenna received signal also sends spectrum analyzer to;
2, phase shifter in the automatic Polarization adjusting module and attenuator all are arranged on 0 ° or 0dB state, when writing down independent horizontally-polarized antenna and using vertical polarized antenna as transmitting antenna separately with spectrum analyzer mensuration and with computer respectively, beacon antenna sends the incoming level value of spectrum analyzer to;
3, adjust first, second numerical-control attenuator, the level that the transmits adjustment of horizontally-polarized antenna and vertical polarized antenna is consistent, and the value of adjusting first, second numerical-control attenuator of back is respectively A1 and A2;
4, change the value of second digital phase shifter, measure the incoming level value that beacon antenna sends spectrum analyzer to, the phase value φ 0 when the recorder level value reaches maximum;
5, the phase value of second digital phase shifter is arranged to φ=φ 0+180 °, the record beacon antenna sends the incoming level value C (dBm of unit) of spectrum analyzer to, cross polarization level when this value (is got negative sign when the θ＞0, get positive sign when θ＜0) in θ ± 90 ° for polarizing angle;
6, with the beacon antenna half-twist, promptly forward ° position, θ ± 90 to, the phase value of second digital phase shifter still is φ=φ 0+180 °, and the record beacon antenna sends the incoming level value of spectrum analyzer to, and be main pole level M (dBm of unit) this moment;
When 7, the polarizing angle that obtains of record is θ ± 90 °, first, second numerical-control attenuator and the second digital phase shifter respective value A1, A2 and φ, promptly these devices in automatic Polarization adjusting module this moment are adjusted to this state, the antenna 10 of calibration of waiting to polarize just forms the polarized state of θ ± 90 ° direction, and this moment, the cross polarization isolation of this antenna was: M-C (dB).
The present invention compares background technology following advantage:
1, the present invention utilizes the method for automatic adjustment Orthogonal Double linear polarization element amplitude ratio to finish automatic Polarization and adjusts function, has and regulates the speed soon, adjusts effective, as not change antenna advantages such as profile.
2, automatic Polarization adjusting module 3 of the present invention adopts modularized design, not only can realize polarization adjustment function, and have very little size and weight, can conveniently be used for miniature antenna.
3, the present invention adopts automatic calibrating method to finish the polarization calibration process, and calibration process is fast, precision is high.
4, the present invention does not need mechanical rotation, and polarization can not cause when adjusting that antenna height increases; The present invention can realize the automatic Polarization adjustment, and it is fast to regulate the speed; The present invention is applicable to various forms of antennas.
Description of drawings
Fig. 1 is an electric principle composition frame chart of the present invention.
Fig. 2 is the electric principle composition frame chart of automatic Polarization adjusting module 3 of the present invention.
Fig. 3 is the calibration system composition frame chart of antenna system of the present invention during as reception antenna.
Fig. 4 is the calibration system composition frame chart of antenna system of the present invention during as transmitting antenna.
Fig. 5 is the polarization calibration steps flow chart of antenna system of the present invention during as reception antenna.
Embodiment
Referring to figs. 1 through Fig. 2, the present invention includes horizontally-polarized antenna 1, vertical polarized antenna 2, automatic Polarization adjusting module 3, polarization control circuit 4, described horizontally-polarized antenna 1 or vertical polarized antenna 2 are various forms of antennas or aerial array, and its polarization is respectively horizontal polarization and perpendicular polarization.Fig. 1 is an electric principle composition frame chart of the present invention, and embodiment presses Fig. 1 connection line.Wherein horizontally-polarized antenna 1, vertical polarized antenna 2 are respectively the antenna or the aerial arrays of horizontal polarization form and perpendicular polarization form, effect is to receive respectively from the space or to the space to send electromagnetic horizontal polarization component and perpendicular polarization component, and embodiment adopts 4 * 32 aerial array.For reception antenna, two inputs of automatic Polarization adjusting module 3 are connected with vertical polarized antenna 2 with horizontally-polarized antenna 1 with radio frequency cable respectively, the output of automatic Polarization adjusting module 3 is connected with external receiving equipment or transmitter by radio frequency cable, its effect is to adjust the amplitude-phase relation between horizontal polarization signal and the perpendicular polarization signal, the function that the realization automatic Polarization is adjusted automatically, and embodiment adopts special-purpose polarization adjusting module; Polarization control circuit 4 is connected with automatic Polarization adjusting module 3 by telecommunication cable, and its effect is that embodiment adopts the control circuit of phase shifter and attenuator according to the amplitude and the phase place of control command control polarization adjusting module 3.Polarization control circuit 4 is connected with external watch-dog by telecommunication cable.For transmitting antenna, in the above-mentioned annexation, input and output all exchange get final product.
Described automatic Polarization adjusting module 3 is made up of first, second amplifier and match circuit 5-1,5-2, first, second digital phase shifter 6-1,6-2, first, second numerical-control attenuator 7-1,7-2, mixer 8-1 or splitter 8-2.For reception antenna, the input of described first, second amplifier and match circuit 5-1,5-2 connects horizontally-polarized antenna 1 and vertical polarized antenna 2 respectively, the output of first, second amplifier and match circuit 5-1,5-2 is connected in series the input of first, second digital phase shifter 6-1,6-2 respectively, its effect is an amplifying signal, and embodiment adopts commercially available amplifier integrated circuit; The output of first, second digital phase shifter 6-1,6-2 is connected in series the input of first, second numerical-control attenuator 7-1,7-2 respectively, and its effect is that signal is carried out phase shift, and embodiment adopts commercially available digital phase shifter integrated circuit; The input of the output serial connection mixer 8-1 of first, second numerical-control attenuator 7-1,7-2, its effect is that signal is decayed, embodiment adopts commercially available numerical-control attenuator integrated circuit; The output of mixer 8-1 connects external reception or transmitter by radio frequency cable, and its effect is a composite signal, and embodiment adopts commercially available power splitter or special-purpose power splitter to make.For transmitting antenna, in the above-mentioned annexation, mixer 8-1 changes splitter 8-2 into, and the input of miscellaneous part and output all exchange get final product.
Polarization calibration steps of the present invention adopts the automatic Polarization calibration steps, automatic Polarization calibration system composition frame chart as shown in Figure 3, wherein Fig. 3 waits to polarize the antenna 10 of the calibration calibration system composition frame chart during as reception antenna, the automatic Polarization calibration system is by the antenna of waiting to polarize and calibrate 10, test table 11, spectrum analyzer 12, interface convertor 13-1,13-2, computer 14, beacon antenna 15, polarization whirligig 16, signal source 17, beacon tower 18 is formed, the antenna of calibrating 10 of waiting to polarize is automatic Polarization adjustment antenna of the present invention, test table 11, spectrum analyzer 12, interface convertor 13-1,13-2, computer 14, beacon antenna 15, polarization whirligig 16, signal source 17, beacon tower 18 is commercially available instrument or equipment.Its automatic Polarization calibration steps comprises step:
1, beacon antenna 15 is rotated to a certain angle θ, with antenna 10 normal alignment beacon antennas 15 received signals of waiting to polarize and calibrate, signal source 17 transmits and sends by beacon antenna 15;
2, phase shifter in the automatic Polarization adjusting module 3 and attenuator all are arranged on 0 ° or 0dB state, when writing down independent horizontally-polarized antenna 1 and using vertical polarized antenna 2 as reception antenna separately with spectrum analyzer 12 mensuration and with computer 14 respectively, the incoming level value of automatic Polarization adjusting module 3 output ports;
3, adjust first, second numerical-control attenuator 7-1,7-2, the level adjustment of horizontally-polarized antenna 1 and vertical polarized antenna 2 received signals is consistent, and the value of adjusting back numerical-control attenuator 7-1,7-2 is respectively A1 and A2;
4, change the value of the second digital phase shifter 6-2, measure the incoming level value of automatic Polarization adjusting module 3 output ports, the phase value φ 0 when the recorder level value reaches maximum;
5, the phase value of the second digital phase shifter 6-2 is arranged to φ=φ 0+180 °, the level value C (dBm of unit) of record automatic Polarization adjusting module 3 output ports, cross polarization level when this value (is got negative sign when the θ＞0, get positive sign when θ＜0) in θ ± 90 ° for polarizing angle;
6, with beacon antenna 15 half-twists, promptly forward ° position, θ ± 90 to, the phase value of the second digital phase shifter 6-2 still is φ=φ 0+180 °, the level value of record automatic Polarization adjusting module 3 output ports, be main pole level M (dBm of unit) this moment;
When 7, the polarizing angle that obtains of record is θ ± 90 °, first, second numerical-control attenuator 7-1,7-2 and the second digital phase shifter 6-2 respective value A1, A2 and φ, promptly these devices in the automatic Polarization adjusting module 3 this moment are adjusted to this state, and the antenna 10 of the calibration of waiting to polarize just forms the polarized state of θ ± 90 ° direction.This moment, the cross polarization isolation of this antenna was: M-C (dB).
For reception antenna, it is as follows that the course of work is adjusted in polarization of the present invention:
1, horizontally-polarized antenna 1, vertical polarized antenna 2 receive horizontal polarization component and the perpendicular polarization component that comes spacing wave respectively, send into automatic Polarization adjusting module 3.
2, the control command that sends according to external telecommunication cable of polarization control circuit 4, first, second digital phase shifter 6-1,6-2 in the control automatic Polarization adjusting module 3 and the value of first, second numerical-control attenuator 7-1,7-2.
3, promptly form through the adjusted signal of hyperpolarization on the external radio frequency cable of automatic Polarization adjusting module 3.
4, in the antenna use, receive the control command that external telecommunication cable transmits constantly according to antenna attitude variation or dbjective state variation, controlling first, second digital phase shifter 6-1,6-2 in the automatic Polarization adjusting module 3 and the value of first, second numerical-control attenuator 7-1,7-2 constantly, is through the adjusted signal of hyperpolarization all the time on the external radio frequency cable of automatic Polarization adjusting module 3.
Fig. 4 waits to polarize the antenna 10 of the calibration calibration system composition frame chart during as transmitting antenna.For transmitting antenna, the antenna 10 of the step of automatic Polarization calibration steps and the above calibration of waiting to polarize is basic identical as the calibration steps of reception antenna, the location swap of signal source 17 and spectrum analyzer 12 and the interface convertor 13-2 that is connected thereof, computer 14 in the calibration system just, the antenna 10 calibrated of waiting to polarize gets final product as reception antenna as transmitting antenna, beacon antenna 15.
For transmitting antenna, it is as follows that the course of work is adjusted in polarization of the present invention:
1, the signal on the external radio frequency cable of automatic Polarization adjusting module 3 sends to automatic Polarization adjusting module 3.
2, the control command that sends according to external telecommunication cable of polarization control circuit 4, first, second digital phase shifter 6-1,6-2 in the control automatic Polarization adjusting module 3 and the value of first, second numerical-control attenuator 7-1,7-2.
3, automatic Polarization adjusting module 3 sends to horizontally-polarized antenna 1, vertical polarized antenna 2 to the signal of adjusting respectively, and the signal that horizontally-polarized antenna 1, vertical polarized antenna 2 send forms the signal of adjusting through hyperpolarization in the space.
4, in the antenna use, receive the control command that external telecommunication cable transmits constantly according to antenna attitude variation or dbjective state variation, control first, second digital phase shifter 6-1,6-2 in the automatic Polarization adjusting module 3 and the value of first, second numerical-control attenuator 7-1,7-2 constantly, the signal that horizontally-polarized antenna 1, vertical polarized antenna 2 send forms the signal of adjusting through hyperpolarization all the time in the space.
Claims (6)
1. an automatic Polarization is adjusted antenna system, and described antenna is a reception antenna, comprises horizontally-polarized antenna (1) and vertical polarized antenna (2), it is characterized in that: also comprise automatic Polarization adjusting module (3) and polarization control circuit (4); Two input ports of described automatic Polarization adjusting module (3) use radio frequency cable to be connected with vertical polarized antenna (2) with horizontally-polarized antenna (1) respectively, the output port usefulness radio frequency cable of automatic Polarization adjusting module (3) is connected with external receiving equipment, is used for adjusting automatically the amplitude-phase relation between horizontal polarization signal and the perpendicular polarization signal, the adjustment of realization automatic Polarization; Polarization control circuit (4) is connected with automatic Polarization adjusting module (3), is used for amplitude and phase place according to control command control polarization adjusting module (3).
2. a kind of automatic Polarization according to claim 1 is adjusted antenna system, it is characterized in that: described automatic Polarization adjusting module (3) is made up of first, second amplifier and match circuit (5-1,5-2) thereof, first, second digital phase shifter (6-1,6-2), first, second numerical-control attenuator (7-1,7-2), mixer (8-1); The input port of first, second amplifier and match circuit thereof (5-1,5-2) connects the output port of horizontally-polarized antenna (1) and vertical polarized antenna (2) respectively, the output port of first, second amplifier and match circuit thereof (5-1,5-2) is connected in series the input port of first, second digital phase shifter (6-1,6-2) respectively, so use amplifying signal; The output port of first, second digital phase shifter (6-1,6-2) is connected in series the input port of first, second numerical-control attenuator (7-1,7-2) respectively, so with signal is carried out phase shift; The input port of the output port serial connection mixer (8-1) of first, second numerical-control attenuator (7-1,7-2) is used for signal is decayed; The output port usefulness radio frequency cable of mixer is connected with external receiving equipment.
3. an automatic Polarization is adjusted antenna system, and described antenna is a transmitting antenna, comprises horizontally-polarized antenna (1) and vertical polarized antenna (2), it is characterized in that: also comprise automatic Polarization adjusting module (3) and polarization control circuit (4); Two output ports of described automatic Polarization adjusting module (3) use radio frequency cable to be connected with vertical polarized antenna (2) with horizontally-polarized antenna (1) respectively, the input port usefulness radio frequency cable of automatic Polarization adjusting module (3) is connected with external transmitter, is used for adjusting automatically the amplitude-phase relation between horizontal polarization signal and the perpendicular polarization signal, the adjustment of realization automatic Polarization; Polarization control circuit (4) is connected with automatic Polarization adjusting module (3), is used for amplitude and phase place according to control command control polarization adjusting module (3).
4. a kind of automatic Polarization according to claim 3 is adjusted antenna system, it is characterized in that: described automatic Polarization adjusting module (3) is made up of first, second amplifier and match circuit (5-1,5-2) thereof, first, second digital phase shifter (6-1,6-2), first, second numerical-control attenuator (7-1,7-2), splitter (8-2); The output port of first, second amplifier and match circuit thereof (5-1,5-2) connects the input port of horizontally-polarized antenna (1) and vertical polarized antenna (2) respectively, the input port of first, second amplifier and match circuit thereof (5-1,5-2) is connected in series the output port of first, second digital phase shifter (6-1,6-2) respectively, so use amplifying signal; The input port of first, second digital phase shifter (6-1,6-2) is connected in series the output port of first, second numerical-control attenuator (7-1,7-2) respectively, so with signal is carried out phase shift; The output port of the input port serial connection splitter (8-2) of first, second numerical-control attenuator (7-1,7-2) is used for signal is decayed; The input port usefulness radio frequency cable of splitter (8-2) is connected with external transmitter.
5. an automatic Polarization is adjusted the polarization calibration steps of antenna system, described antenna is a reception antenna, form by horizontally-polarized antenna (1) and vertical polarized antenna (2), mainly realize by means of the automatic Polarization calibration system, described automatic Polarization calibration system comprises the antenna (10) of the calibration of waiting to polarize, test table (11), spectrum analyzer (12), first, second interface convertor (the 13-1,13-2), computer (14), beacon antenna (15), polarization whirligig (16), signal source (17) and beacon tower (18), computer (14) is by interface convertor (13-1) control first in the antenna (10) of calibration of waiting to polarize, second digital phase shifter (the 6-1,6-2) with first, second numerical-control attenuator (the 7-1,7-2), read the power level value of spectrum analyzer (12) by interface convertor (13-2) simultaneously, it is characterized in that comprising step:
1) beacon antenna (15) is rotated to a certain angle θ, with antenna (10) normal alignment beacon antenna (15) received signal of waiting to polarize and calibrate, signal source (17) transmits and sends by beacon antenna (15);
2) phase shifter in the automatic Polarization adjusting module (3) and attenuator all are arranged on 0 ° or 0dB state, use spectrum analyzer (12) to measure respectively and when writing down independent horizontally-polarized antenna (1) and independent use vertical polarized antenna (2) as reception antenna, the incoming level value of automatic Polarization adjusting module (3) output port with computer (14);
3) adjust first, second numerical-control attenuator (7-1), (7-2), the level adjustment of horizontally-polarized antenna (1) and vertical polarized antenna (2) received signal is consistent, and the value of adjusting back numerical-control attenuator (7-1), (7-2) is respectively A1 and A2;
4) value of change second digital phase shifter (6-2), the incoming level value of measurement automatic Polarization adjusting module (3) output port, the phase value d φ 0 when the recorder level value reaches maximum;
5) phase value of second digital phase shifter (6-2) is arranged to φ=φ 0+180 °, the level value C (dBm of unit) of record automatic Polarization adjusting module (3) output port, cross polarization level when this value (is got negative sign when the θ＞0, get positive sign when θ＜0) in θ ± 90 ° for polarizing angle;
6) with beacon antenna (15) half-twist, promptly forward ° position, θ ± 90 to, the phase value of second digital phase shifter (6-2) still is φ=φ 0+180 °, the level value of record automatic Polarization adjusting module (3) output port, and be main pole level M (dBm of unit) this moment;
When 7) polarizing angle that obtains of record is θ ± 90 °, first, second numerical-control attenuator (7-1,7-2) and second digital phase shifter (6-2) respective value A1, A2 and φ, promptly these devices in automatic Polarization adjusting module this moment (3) are adjusted to this state, the antenna (10) of calibration of waiting to polarize just forms the polarized state of θ ± 90 ° direction, and this moment, the cross polarization isolation of this antenna was: M-C (dB).
6. an automatic Polarization is adjusted the polarization calibration steps of antenna system, described antenna is a transmitting antenna, form by horizontally-polarized antenna (1) and vertical polarized antenna (2), mainly realize by means of the automatic Polarization calibration system, described automatic Polarization calibration system comprises the antenna (10) of the calibration of waiting to polarize, test table (11), spectrum analyzer (12), first, second interface convertor (the 13-1,13-2), computer (14), beacon antenna (15), polarization whirligig (16), signal source (17) and beacon tower (18), computer (14) is by interface convertor (13-1) control first in the antenna (10) of calibration of waiting to polarize, second digital phase shifter (the 6-1,6-2) with first, second numerical-control attenuator (the 7-1,7-2), read the power level value of spectrum analyzer (12) by interface convertor (13-2) simultaneously, it is characterized in that comprising step:
1) beacon antenna (15) is rotated to a certain angle θ, to wait to polarize antenna (10) the normal alignment beacon antenna (15) of calibration and the signal that signal source (17) is sent launched, beacon antenna (15) received signal also sends spectrum analyzer (12) to;
2) phase shifter in the automatic Polarization adjusting module (3) and attenuator all are arranged on 0 ° or 0dB state, use spectrum analyzer (12) to measure respectively and when writing down independent horizontally-polarized antenna (1) and independent use vertical polarized antenna (2) as transmitting antenna with computer (14), beacon antenna (15) sends the incoming level value of spectrum analyzer (12) to;
3) adjust first, second numerical-control attenuator (7-1), (7-2), the level adjustment that horizontally-polarized antenna (1) and vertical polarized antenna (2) transmit is consistent, and the value of adjusting back numerical-control attenuator (7-1), (7-2) is respectively A1 and A2;
4) value of change second digital phase shifter (6-2) is measured the incoming level value that beacon antenna (15) sends spectrum analyzer (12) to, the phase value φ 0 when the recorder level value reaches maximum;
5) phase value of second digital phase shifter (6-2) is arranged to φ=φ 0+180 °, record beacon antenna (15) sends the level value C (dBm of unit) of spectrum analyzer (12) to, cross polarization level when this value (is got negative sign when the θ＞0, get positive sign when θ＜0) in θ ± 90 ° for polarizing angle;
6) with beacon antenna (15) half-twist, promptly forward ° position, θ ± 90 to, the phase value of second digital phase shifter (6-2) still is φ=φ 0+180 °, and record beacon antenna (15) sends the level value of spectrum analyzer (12) to, and be main pole level M (dBm of unit) this moment;
When 7) polarizing angle that obtains of record is θ ± 90 °, first, second numerical-control attenuator (7-1,7-2) and second digital phase shifter (6-2) respective value A1, A2 and φ, promptly these devices in automatic Polarization adjusting module this moment (3) are adjusted to this state, the antenna (10) of calibration of waiting to polarize just forms the polarized state of θ ± 90 ° direction, and this moment, the cross polarization isolation of this antenna was: M-C (dB).
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Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
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