CN102610920A - Antenna-feeder system and phase calibration method - Google Patents
Antenna-feeder system and phase calibration method Download PDFInfo
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Abstract
The invention provides an antenna-feeder system and a phase calibration method. The antenna-feeder system comprises a first phase shift network and a second phase shift network, wherein the first phase shift network and the second phase shift network comprise corresponding phase shift devices with the same number, the antenna-feeder system also comprises a first phase shift control module, a coupler module, a phase difference detection module and a second phase shift control module, the first phase shift control module is used for receiving phase change quantity control signals and regulates the phase shift quantity of the phase shift devices in the first phase shift network according to the phase change quantity control signals, the coupler module is used for coupling radio frequency signals of each path of phase shift devices passing through the first phase shift network and the second phase shift network, in addition, the radio frequency signals are sent to the phase difference detection module, the phase difference detection module is used for obtaining the phase difference of the phase shift devices with the corresponding relationship in the first phase shift network and the second phase shift network according to the phase value of the radio frequency signals and sending the phase difference to the second phase shift control module, and the second phase shift control module is used for regulating the phase shift quantity of the phase shift devices in the second phase shift network according to the phase difference.
Description
Technical field
The present invention relates to the signal calibration technology, relate in particular to a kind of antenna-feedback system and phase alignment, belong to communication technical field.
Background technology
In the mobile communication, the angle of pitch of antenna is an important parameters of network operation and optimization, and the angle of pitch that antenna rationally is set is the basic assurance of whole mobile communication network quality.Can realize the adjusting of the antenna beam angle of pitch through the relative phase of regulating FD feed on each array element.
Dual polarized antenna is made up of two groups of radiating elements with mutually orthogonal polarised direction, and every group of radiating element has identical array features.Since the correlation between the different polarization direction signals a little less than, therefore with respect to single-polarized antenna, dual polarized antenna can produce the effect of polarization diversity preferably.
Fig. 1 is the system architecture diagram of the antenna-feedback system of typical application dual polarized antenna.As shown in Figure 1, baseband processing unit (BBU) 11 and radio frequency remoto module (RRU) 12 are sent to antenna-feedback system 13 through two cables with signal.Wherein, cable transmission to the first polarization of signal warp port one 4a, and through another root cable transmission to the second polarization port one 4b.Fig. 2 is the internal structure sketch map of antenna-feedback system shown in Figure 1.As shown in Figure 2; The radiofrequency signal of the first polarization port one 4a input through the first power division network 22a and the first phase-shift network 23a after; Input to the first polarization array element (shown in the solid line of aerial array among Fig. 2 24); The radiofrequency signal of the second polarization port one 4b input through the second power division network 22b and the second phase-shift network 23b after, input to the second polarization array element (shown in the dotted line of aerial array part among Fig. 2).Each phase shifter among the first phase-shift network 23a and the second phase-shift network 23b presets certain phase shift angle; In practical application; Can be according to the change of the angle of the angle of declination of required antenna in the network planning, in phase shifting control port 25 signalization phase change amounts, this phase change amount can on the occasion of or negative value; By each phase shifter among the phase shifting control module 26 control first phase-shift network 23a and the second phase-shift network 23b; On the basis of current phase shift angle, increase or reduce the corresponding angle of phase change amount, be fed into the signal relative phase of two each array elements of polarization array, realize the control of the angle of pitch with change.
The phase sensitive degree of radiofrequency signal is higher, and receives influence of various factors, and transmission cable length, transmission apparatus performance etc. can both change the phase place of signal.Because the radiofrequency signal of two polarization of dual polarized antenna array is through independently feeding network (power division network and phase-shift network) transmission; It is inconsistent that factors such as the influence at cable error in length, merit branch networking and phase-shift network phase shift error have caused the FD feed phase place of two polarization arrays in the feeding network; Though be employed in the phase place that phase shifting control port signalization phase change amount is regulated two polarization arrays in the such scheme; But can't calibrate the phase error that the two-way radiofrequency signal produces through feeding network independently; Cause two radiation pattern angles of pitch on the polarised direction inconsistent; The electromagnetic wave that occurs on two polarised directions in the cell edge position covers inconsistent problem, has reduced the polarization diversity effect.
Summary of the invention
The present invention provides a kind of antenna-feedback system and phase alignment, in order to eliminate the phase error of two-way radiofrequency signal because of producing through different feeding network transmission in the antenna-feedback system.
According to an aspect of the present invention; A kind of antenna-feedback system is provided; Comprise first phase-shift network and second phase-shift network, said first phase-shift network and said second phase-shift network comprise the phase shifter of equal number, and the phase shifter in said first phase-shift network is corresponding with the phase shifter in said second phase-shift network; Also comprise the first phase shifting control module, the second phase shifting control module, coupler module and phase difference detection module, wherein:
The said first phase shifting control module is used for receiving phase change amount control signal, the amount of phase shift of regulating the phase shifter in said first phase-shift network according to said phase change amount control signal;
Said coupler module is used for being coupled through the radiofrequency signal of each road phase shifter of said first phase-shift network and said second phase-shift network, and said radiofrequency signal is sent to said phase difference detection module;
Said phase difference detection module is used for the phase value according to said radiofrequency signal, obtains the phase difference that has the phase shifter of corresponding relation in said first phase-shift network and said second phase-shift network, and said phase difference is sent to the second phase shifting control module;
The said second phase shifting control module is used for according to said phase difference, regulates the amount of phase shift of the phase shifter in said second phase-shift network.
According to a further aspect in the invention, a kind of phase alignment is provided also, comprises:
The first phase shifting control module receiving phase change amount, the amount of phase shift of regulating the phase shifter in first phase-shift network according to said phase change amount;
The radiofrequency signal of coupler module coupling each the road phase shifter in said first phase-shift network and second phase-shift network, and said radiofrequency signal is sent to the phase difference detection module;
Said phase difference detection module is obtained the phase difference that has the phase shifter of corresponding relation in said first phase-shift network and said second phase-shift network according to the phase value of said radiofrequency signal, and said phase difference is sent to the second phase shifting control module;
The said second phase shifting control module is regulated the amount of phase shift of the phase shifter in said second phase-shift network according to said phase difference.
According to antenna-feedback system provided by the invention and phase alignment; Because the first polarization phase shifting control module is only controlled first phase-shift network according to the phase change amount that receives; Realize the luffing angle control of the first poliarizing antenna array corresponding with first phase-shift network; In antenna-feedback system, increase coupler group and phase difference detection module simultaneously; Detecting the phase place difference of the radiofrequency signal after first phase-shift network and the second phase-shift network phase shift in real time, and the amount of phase shift of second phase-shift network is regulated, realize the angle of pitch control of the second poliarizing antenna array according to phase place difference amount.Therefore; This antenna-feedback system can eliminate since the two-way radiofrequency signal through two different paths; Thereby two polarised direction figure of the inconsistent antenna that causes of signal phase angle of pitch that difference such as length of cable error, power division network influence and phase-shift network precision cause changes inconsistent problem, has improved dual polarized antenna polarization diversity effect.
Description of drawings
Fig. 1 is the system architecture diagram of the antenna-feedback system of typical application dual polarized antenna;
Fig. 2 is the internal structure sketch map of antenna-feedback system shown in Figure 1;
Fig. 3 is the structural representation of the antenna-feedback system of the embodiment of the invention one;
Fig. 4 is the structural representation of the antenna-feedback system of the embodiment of the invention two;
Fig. 5 is the transport stream signal journey sketch map of antenna-feedback system shown in Figure 4;
Fig. 6 is the schematic flow sheet of the phase alignment of the embodiment of the invention four.
Embodiment
Embodiment one
Fig. 3 is the structural representation of the antenna-feedback system of the embodiment of the invention one.As shown in Figure 3, this antenna-feedback system comprises the first phase-shift network 31a, the second phase-shift network 31b, the first phase shifting control module 32a, the second phase shifting control module 32b, coupler module 33 and phase difference detection module 34, wherein:
The first phase-shift network 31a and the second phase-shift network 31b comprise the phase shifter of equal number, and the phase shifter among the said first phase-shift network 31a is corresponding with the phase shifter among the said second phase-shift network 31b;
The first phase shifting control module 32a is used for receiving phase change amount, regulates the amount of phase shift of the phase shifter among the said first phase-shift network 31a according to said phase change amount;
Said phase difference detection module 34; Be used for phase value according to said radiofrequency signal; Obtain among said first phase-shift network 31a and the said second phase-shift network 31b, have the phase difference of the phase shifter of corresponding relation, and said phase difference is sent to the second phase shifting control module 32b;
The said second phase shifting control module 32b is used for according to said phase difference, regulates the amount of phase shift of the phase shifter among the said second phase-shift network 31b.
Particularly, including n phase shifter with the first phase-shift network 31a and the second phase-shift network 31b among Fig. 3 is that example describes, and n is any natural number that is provided with as required, situation as shown in Figure 3, and n is greater than 3.Comprise among the first phase-shift network 31a that phase shifter 11 is to phase shifter 1n; Comprise phase shifter 21 to phase shifter 2n among the second phase-shift network 31b, wherein the first phase-shift network 31a is corresponding one by one with phase shifter among the second phase-shift network 31b, and promptly phase shifter 11 is corresponding with phase shifter 21; Phase shifter 12 is corresponding with phase shifter 22; Phase shifter 13 is corresponding with phase shifter 23, and similarly, phase shifter 1n is corresponding with phase shifter 2n.Wherein, This antenna-feedback system in the course of the work; The two-way radiofrequency signal is sent to the first phase-shift network 31a and the second phase-shift network 31b respectively, and is undertaken being sent to poliarizing antenna array (not shown among Fig. 3) after the phase shift by the phase shifter among the first phase-shift network 31a and the second phase-shift network 31b.For example; The radiofrequency signal of carrying out phase shift through phase shifter 11 is sent to first poliarizing antenna; The radiofrequency signal of carrying out phase shift through phase shifter 21 for example is sent to second poliarizing antenna; Phase shifter 11 is corresponding with phase shifter 21, and promptly first poliarizing antenna and second poliarizing antenna are the dual polarized antenna with mutually orthogonal polarised direction.
The phase shifting control port (not shown among Fig. 3) that the first phase shifting control module 32a is provided with through self obtains by phase change amount user's input or that provided by arbitrary network equipment; Generate the phase adjusted instruction according to the phase change amount; And the phase shifter 11 among the first phase-shift network 31a to the amount of phase shift of phase shifter 1n is regulated according to phase adjusted instruction; Wherein the phase change amount can be provided with according to the angle at the descending angle of required antenna in the network planning, and its numerical value can be on the occasion of also being negative value.
Phase difference detection module 34 is according to the signal in groups that receives from coupler module 33; Detect the phase difference of two paths of signals in this group signal; And this phase difference is sent to the second phase shifting control module 32b, so that carrying out amount of phase shift according to this phase difference to the phase shifter among the second phase-shift network 31b, regulates the second phase shifting control module 32b.
In the present embodiment, phase difference detection module 34 existing phase difference detectors capable of using realize that the first phase shifting control module 32a and the second phase shifting control module 32b existing phase-shift controller capable of using are realized.
Antenna-feedback system according to the foregoing description; Because the first polarization phase shifting control module is only controlled first phase-shift network according to the phase change amount that receives; Realize the luffing angle control of the first poliarizing antenna array corresponding with first phase-shift network; In antenna-feedback system, increase coupler group and phase difference detection module simultaneously; Detecting the phase place difference of the radiofrequency signal after first phase-shift network and the second phase-shift network phase shift in real time, and the amount of phase shift of second phase-shift network is regulated, realize the angle of pitch control of the second poliarizing antenna array according to phase place difference amount.Therefore; This antenna-feedback system can eliminate since the two-way radiofrequency signal through two different paths; Thereby two polarised direction figure of the inconsistent antenna that causes of signal phase angle of pitch that difference such as length of cable error, power division network influence and phase-shift network precision cause changes inconsistent problem, has improved dual polarized antenna polarization diversity effect.
Embodiment two
Fig. 4 is the structural representation of the antenna-feedback system of the embodiment of the invention two.In the present embodiment; Comprise that with the coupler group a plurality of single channel couplers are that example describes; As shown in Figure 4, the coupler group comprises 2n single channel coupler, an end of each coupler respectively with the first phase-shift network 43a in phase shifter 11 to 1n and the phase shifter 21 to 2n among the second phase-shift network 43b be connected; Corresponding with the phase shifter respectively poliarizing antenna of the other end connects, and is used to be coupled out after phase shifter carries out phase shift, as the radiofrequency signal of the input signal of poliarizing antenna.
Fig. 5 is the transport stream signal journey sketch map of antenna-feedback system shown in Figure 4.As shown in Figure 5, comprising:
Step S501, first via radiofrequency signal inputs to the first polarization port 41a, through the first power division network 42a, is divided into n road low-power level signal;
Step S502, phase-shifted control signal inputs to the first phase shifting control module 46a through phase shifting control port 47, controls the amount of phase shift of each phase shifter among the first phase-shift network 43a;
Step S503, n road low-power level signal be through the first phase-shift network 43a, each road signal generation phase change;
Step S504, the low-power level signal of the n road first phase-shift network 43a phase shift inputs to the first polarization array element (shown in the solid line of aerial array among Fig. 4 45) through coupler, gives off first via phase shift radiofrequency signal;
Step S505, the second tunnel radiofrequency signal inputs to the second polarization port 41b, through the second power division network 42b, is divided into n road low-power level signal;
Step S506, the n road low-power level signal of second power division network 42b output be through the second phase-shift network 43b, each road signal generation phase change;
Step S507, the low-power level signal of the n road second phase-shift network 43b phase shift inputs to the second polarization array element (shown in the dotted line of aerial array among Fig. 4 45) through coupler, gives off the second tunnel phase shift radiofrequency signal;
Step S508; 2n in the coupler group 44 coupler is coupled out respectively as the low-power level signal of the input of the first polarization array element and the second polarization array element; Form n to output; The corresponding n that exports phase difference detection module 48 respectively to is to input port, and detects each phase difference to the two-way low-power level signal of input port by phase difference detection module 48;
Step S509, phase difference detection module 48 converts each into the respective phase difference signal to the corresponding phase difference of input port, inputs to the second phase shifting control module 46b;
Particularly, phase difference detection module 48 for example is connected through n bar circuit with the second phase shifting control module 46b, and promptly phase difference detection module 48 n port being respectively applied for output n road phase signal is connected with n the port of the second phase shifting control module 46b respectively; For example, the 1st phase signal that phase difference detection module 48 is obtained according to the 1st pair of input port reception signal passes through the 1st output port of self, is sent to the 1st input port of the second phase shifting control module 46b;
Step S510, the phase signal that second phase shifting control module 46b basis receives from phase detecting module 48 is controlled the amount of phase shift of each phase shifter the second phase-shift network 43b;
Particularly; The 1st phase signal that the second phase shifting control module 46b receives according to self the 1st input port, the amount of phase shift of regulating phase shifter 21, similarly; According to the n phase signal that self n input port receives, the amount of phase shift of regulating phase shifter 2n.
Embodiment three
On the basis of the foregoing description, in the present embodiment, the phase difference detection module only is connected through 1 circuit with the second phase shifting control module, and correspondingly, said phase difference detection module also is used to said phase difference sign is set; The said second phase shifting control module also is used for confirming according to said sign the phase shifter of second phase-shift network corresponding with said phase difference, and according to said phase difference, regulates the amount of phase shift of corresponding shifter.
Particularly; Be example still with the antenna-feedback system shown in Fig. 4; Phase difference detection module 48 receives the signal that coupler provides through n to input port, for example receives the low-power level signal through phase shifter 11 and phase shifter 21 phase shifts that coupler is coupled to through the 1st pair of input port, obtains phase signal based on this low-power level signal; And, phase signal is sent to the second phase shifting control module 46b together with sign for this phase signal is provided with one and phase shifter 21 corresponding identification.After the second phase shifting control module 46b receives phase signal, confirm this phase signal corresponding to phase shifter 21, then regulate the amount of phase shift of phase shifter 21 according to phase signal according to the entrained sign of phase signal.
Phase difference detection module in the present embodiment for example realizes through in existing phase difference detector, setting up an identify unit that is used to carry out identification function that this identify unit both can be realized also can realizing through hardware through software.
Embodiment four
Fig. 6 is the schematic flow sheet of the phase alignment of the embodiment of the invention four.As shown in Figure 6, this phase alignment may further comprise the steps:
Step S601, the first phase shifting control module receiving phase change amount, the amount of phase shift of regulating the phase shifter in first phase-shift network according to said phase change amount;
Step S602, the radiofrequency signal of coupler module coupling each the road phase shifter phase shift in said first phase-shift network and second phase-shift network, and said radiofrequency signal is sent to the phase difference detection module;
Step S603, said phase difference detection module is obtained the phase difference that has the phase shifter of corresponding relation in said first phase-shift network and said second phase-shift network according to the phase value of said radiofrequency signal, and said phase difference is sent to the second phase shifting control module;
Step S604, the said second phase shifting control module is regulated the amount of phase shift of the phase shifter in said second phase-shift network according to said phase difference.
Above-mentioned phase alignment is carried out by the antenna-feedback system of above-mentioned arbitrary embodiment, and its idiographic flow is identical with the process of the antenna-feedback system excute phase calibration of the foregoing description, so locate to repeat no more.
Phase alignment according to the foregoing description; Because the first polarization phase shifting control module is only controlled first phase-shift network according to the phase change amount that receives; Realize the luffing angle control of the first poliarizing antenna array corresponding with first phase-shift network; In antenna-feedback system, increase coupler group and phase difference detection module simultaneously; Detecting the phase place difference of the radiofrequency signal after first phase-shift network and the second phase-shift network phase shift in real time, and the amount of phase shift of second phase-shift network is regulated, realize the angle of pitch control of the second poliarizing antenna array according to phase place difference amount.Therefore; Can eliminate since the two-way radiofrequency signal through two different paths; Thereby two polarised direction figure of the inconsistent antenna that causes of signal phase angle of pitch that difference such as length of cable error, power division network influence and phase-shift network precision cause changes inconsistent problem, has improved dual polarized antenna polarization diversity effect.
Further, in the phase alignment of the foregoing description, said phase difference is sent to the second phase shifting control module specifically comprises:
Said phase difference detection module is that said phase difference is provided with sign, and will carry said sign and said phase difference is sent to the said second phase shifting control module;
Correspondingly, the said second phase shifting control module is according to said phase difference, and the amount of phase shift of regulating the phase shifter in said second phase-shift network specifically comprises:
The said second phase shifting control module is confirmed the phase shifter in second phase-shift network corresponding with said phase difference according to said sign, and according to said phase difference, regulates the amount of phase shift of corresponding shifter.
Further, in the phase alignment of the foregoing description, said phase difference is sent to the second phase shifting control module specifically comprises:
Said phase difference detection module is sent to the second phase shifting control module through the circuit corresponding with said phase difference with said phase difference;
Correspondingly, the said second phase shifting control module is according to said phase difference, and the amount of phase shift of regulating the phase shifter in said second phase-shift network specifically comprises:
The said second phase shifting control module is confirmed the phase shifter in second phase-shift network corresponding with said phase difference according to the circuit that receives said phase difference, and according to said phase difference, regulates the amount of phase shift of corresponding shifter.
What should explain at last is: above each embodiment is only in order to explaining technical scheme of the present invention, but not to its restriction; Although the present invention has been carried out detailed explanation with reference to aforementioned each embodiment; Those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, perhaps to wherein part or all technical characteristic are equal to replacement; And these are revised or replacement, do not make the scope of the essence disengaging various embodiments of the present invention technical scheme of relevant art scheme.
Claims (7)
1. antenna-feedback system; Comprise first phase-shift network and second phase-shift network; Said first phase-shift network and said second phase-shift network comprise the phase shifter of equal number, and the phase shifter in said first phase-shift network is corresponding with the phase shifter in said second phase-shift network, it is characterized in that; Also comprise the first phase shifting control module, the second phase shifting control module, coupler module and phase difference detection module, wherein:
The said first phase shifting control module is used for receiving phase change amount control signal, the amount of phase shift of regulating the phase shifter in said first phase-shift network according to said phase change amount control signal;
Said coupler module is used for being coupled through the radiofrequency signal of each road phase shifter of said first phase-shift network and said second phase-shift network, and said radiofrequency signal is sent to said phase difference detection module;
Said phase difference detection module is used for the phase value according to said radiofrequency signal, obtains the phase difference that has the phase shifter of corresponding relation in said first phase-shift network and said second phase-shift network, and said phase difference is sent to the second phase shifting control module;
The said second phase shifting control module is used for according to said phase difference, regulates the amount of phase shift of the phase shifter in said second phase-shift network.
2. antenna-feedback system according to claim 1; It is characterized in that; Said coupler module is the coupler group; Said coupler group comprises a plurality of single channel couplers, and the quantity of wherein said single channel coupler equals the quantity sum of the phase shifter in said first phase-shift network and said second phase-shift network; Perhaps
Said coupler module is single multichannel coupler, the number of channels of said multichannel coupler be not less than in said first phase-shift network with said second phase-shift network in the quantity sum of phase shifter.
3. antenna-feedback system according to claim 1 and 2 is characterized in that, said phase difference detection module is connected with the second phase shifting control module through a circuit;
Correspondingly, said phase difference detection module also is used to said phase difference sign is set; The said second phase shifting control module also is used for confirming according to said sign the phase shifter of second phase-shift network corresponding with said phase difference, and according to said phase difference, regulates the amount of phase shift of corresponding shifter.
4. antenna-feedback system according to claim 1 and 2; It is characterized in that; Said phase difference detection module is connected with the second phase shifting control module through many circuits; The quantity of the phase shifter in the quantity of wherein said circuit and said second phase-shift network equates that said circuit is corresponding with the phase shifter in said second phase-shift network;
Correspondingly, the said second phase shifting control module also is used for confirming the phase shifter in second phase-shift network corresponding with said phase difference according to the circuit that receives said phase difference, and according to said phase difference, regulates the amount of phase shift of corresponding shifter.
5. a phase alignment of carrying out based on the arbitrary described antenna-feedback system of claim 1-4 is characterized in that, comprising:
The first phase shifting control module receiving phase change amount, the amount of phase shift of regulating the phase shifter in first phase-shift network according to said phase change amount;
The radiofrequency signal of coupler module coupling each the road phase shifter in said first phase-shift network and second phase-shift network, and said radiofrequency signal is sent to the phase difference detection module;
Said phase difference detection module is obtained the phase difference that has the phase shifter of corresponding relation in said first phase-shift network and said second phase-shift network according to the phase value of said radiofrequency signal, and said phase difference is sent to the second phase shifting control module;
The said second phase shifting control module is regulated the amount of phase shift of the phase shifter in said second phase-shift network according to said phase difference.
6. phase alignment according to claim 5 is characterized in that, said phase difference is sent to the second phase shifting control module specifically comprises:
Said phase difference detection module is that said phase difference is provided with sign, and said sign and said phase difference are sent to the said second phase shifting control module;
Correspondingly, the said second phase shifting control module is according to said phase difference, and the amount of phase shift of regulating the phase shifter in said second phase-shift network specifically comprises:
The said second phase shifting control module is confirmed the phase shifter in second phase-shift network corresponding with said phase difference according to said sign, and according to said phase difference, regulates the amount of phase shift of corresponding shifter.
7. phase alignment according to claim 5 is characterized in that, said phase difference is sent to the second phase shifting control module specifically comprises:
Said phase difference detection module is sent to the second phase shifting control module through the circuit corresponding with said phase difference with said phase difference;
Correspondingly, the said second phase shifting control module is according to said phase difference, and the amount of phase shift of regulating the phase shifter in said second phase-shift network specifically comprises:
The said second phase shifting control module is confirmed the phase shifter in second phase-shift network corresponding with said phase difference according to the circuit that receives said phase difference, and according to said phase difference, regulates the amount of phase shift of corresponding shifter.
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| WO2016179799A1 (en) * | 2015-05-12 | 2016-11-17 | 华为技术有限公司 | Double-frequency phased array |
| CN106663871A (en) * | 2014-11-19 | 2017-05-10 | 华为技术有限公司 | Phase calibration method and apparatus |
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| CN110299951A (en) * | 2018-03-23 | 2019-10-01 | 中兴通讯股份有限公司 | A kind of phase alignment and device |
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