CN112269070A - Channel balancing method and system for antenna test dual-polarization probe - Google Patents
Channel balancing method and system for antenna test dual-polarization probe Download PDFInfo
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Abstract
The invention discloses a channel balancing method and a channel balancing system for an antenna test dual-polarized probe, wherein the method comprises the following steps: determining a channel balance initial position of a dual-polarization channel probe according to the polarization type of the antenna to be tested; acquiring amplitudes and phases corresponding to two polarizations of a dual-polarization channel probe at a channel balance initial position; rotating the dual-polarization channel probe for multiple times according to a preset rotation rule until the dual-polarization channel probe returns to the initial channel balance position again; simultaneously acquiring the amplitude and the phase corresponding to the two polarizations in each rotation process; and carrying out channel balance according to the obtained amplitude and phase to obtain channel balance data. The invention eliminates the twisting influence of the rotary joint and the cable in the traditional channel balancing method, obtains the channel balancing data after eliminating the twisting influence of the rotary joint and the cable by using error cancellation through a mathematical algorithm, and completes the channel balancing by using the antenna testing system on the basis of not adding extra hardware equipment.
Description
Technical Field
The invention belongs to the technical field of antenna measurement, and particularly relates to a channel balancing method and system for an antenna test dual-polarization probe.
Background
The dual-polarized probe is a standard probe widely adopted in the field of antenna testing in recent years, and compared with a single-polarized probe, the dual-polarized probe is high in testing efficiency and high in testing speed. The excellent characteristics of the compound are rapidly and widely appreciated, and the compound has excellent performances in near field, far field and compact field in recent years, and is widely applied.
The probe can obtain two orthogonal polarized directional diagram information without rotating during the test of the dual-polarized probe, and the antenna test can avoid the influence of various errors such as the twisting of a rotary joint and a cable, but the errors can still be introduced by the conventional channel balancing mode adopted at present, so that the dual-polarized probe loses the advantages in the aspect.
In the traditional channel balance mode, a rotary joint (or a cable) and a polarization shaft are utilized, H and V channels are used for measuring electric field information of the same polarization respectively, and a channel balance result is calculated through the measured electric field amplitude and phase difference. The scheme has certain defect that errors caused by rotation joints (or cable twisting) are introduced, rotation keys need to be omitted, or the cable responses at different angles are different, so that the final measurement result has errors and inaccuracy.
Disclosure of Invention
The technical problem of the invention is solved: the method and the system overcome the defects of the prior art, eliminate the twisting influence of a rotary joint and a cable in the traditional channel balancing method, obtain channel balancing data after the twisting influence of the rotary joint and the cable is eliminated by using error cancellation through a mathematical algorithm, and complete channel balancing by using the antenna testing system on the basis of not adding extra hardware equipment.
In order to solve the technical problem, the invention discloses a channel balancing method of an antenna testing dual-polarized probe, which comprises the following steps:
determining a channel balance initial position of a dual-polarization channel probe according to the polarization type of the antenna to be tested;
acquiring amplitudes and phases corresponding to two polarizations of the dual-polarization channel probe at a channel balance initial position, and recording the amplitudes and phases as initial data;
rotating the dual-polarization channel probe for multiple times according to a preset rotation rule until the dual-polarization channel probe returns to the initial channel balance position again; simultaneously, acquiring the amplitude and the phase corresponding to two polarizations in each rotation process of the dual-polarized channel probe, and recording the amplitude and the phase as process data;
and carrying out channel balance according to the initial data and the process data to obtain channel balance data.
In the above method for channel balancing of antenna test dual-polarized probe, determining an initial channel balancing position of the dual-polarized channel probe according to the polarization type of the antenna to be tested includes:
if the polarization type of the antenna to be tested is circular polarization, selecting any position as a channel balance initial position;
and if the polarization type of the antenna to be tested is linear polarization, selecting a position with an included angle of 45 degrees with the main polarization as a channel balance initial position.
In the channel balancing method for testing a dual-polarized probe by using the antenna, the method further comprises the following steps: and according to the universal antenna test method, the antenna to be tested and the dual-polarized channel probe are installed and field calibrated.
In the channel balancing method for the antenna test dual-polarized probe, the preset rotation rule is as follows: and the rotation is carried out in turn according to the clockwise direction, each time the rotation is carried out by 90 degrees, the rotation is carried out for 4 times in total, and the channel is returned to the balance initial position again.
In the above-described channel balancing method of the antenna testing dual-polarized probe head,
initial data, comprising: h polarization amplitude EH of dual-polarization channel probe when channels balance initial position1Am and phase EH1Ph, and V polarization amplitude EV1Am and phase EV1_ph；
Process data, comprising:
after the probe rotates clockwise for 90 degrees for the first time, the H polarization amplitude EH of the dual-polarization channel probe2Am and phase EH2Ph, and V polarization amplitude EV2Am and phase EV2_ph；
After the probe rotates clockwise for 90 degrees for the second time, the H polarization amplitude EH of the dual-polarization channel probe3Am and phase EH3Ph, and V polarization amplitude EV3Am and phase EV3_ph；
After the probe rotates clockwise for 90 degrees for the third time, the H polarization amplitude EH of the dual-polarization channel probe4Am and phase EH4Ph, and V polarization amplitude EV4Am and phase EV4_ph；
After the fourth clockwise rotation is carried out for 90 degrees, the H polarization amplitude EH of the dual-polarization channel probe5Am and phase EH5Ph, and V polarization amplitude EV5Am and phase EV5_ph。
In the above method for channel balancing of an antenna test dual-polarization probe, channel balancing is performed according to initial data and process data to obtain channel balancing data, and the method includes:
according to EH1_am、EH2_am、EH3_am、EH4_am、EH5_am、EH1_ph、EH2_ph、EH3_ph、EH4_ph、EH5_ph、EV1_am、EV2_am、EV3_am、EV4_am、EV5_am、EV1_ph、EV2_ph、EV3_ph、EV4Ph and EV5Phi, resolving to obtain an amplitude average value delta am and a phase average value delta ph;
and subtracting delta am from the amplitude of the V-polarized directional diagram tested by the dual-polarized probe, and subtracting delta ph from the phase of the V-polarized directional diagram to obtain directional diagram data after channel balance.
In the channel balancing method for testing the dual-polarized probe by the antenna, the solving mode of the amplitude mean value Δ am and the phase mean value Δ ph is as follows:
ΔamA＝EV4_am-EH5_am
ΔamB＝EV3_am-EH4_am
ΔamC＝EV2_am-EH3_am
ΔamD＝EV1_am-EH2_am
ΔamE＝EV5_am-EH4_am
ΔamF＝EV4_am-EH3_am
ΔamG＝EV3_am-EH2_am
ΔamH＝EV2_am-EH1_am
comprises the following steps:
Δam＝(ΔamA+ΔamB+ΔamC+ΔamD+ΔamE+ΔamF+ΔamG+ΔamH)/8
ΔphA＝EV4_ph-EH5_ph
ΔphB＝EV3_ph-EH4_ph
ΔphC＝EV2_ph-EH3_ph
ΔphD＝EV1_ph-EH2_ph
ΔphE＝EV5_ph-EH4_ph-180
ΔphF＝EV4_ph-EH3_ph-180
ΔphG＝EV3_ph-EH2_ph-180
ΔphH＝EV2_ph-EH1_ph-180
comprises the following steps:
Δph＝(ΔphA+ΔphB+ΔphC+ΔphD+ΔphE+ΔphF+ΔphG+ΔphH)/8
where Δ amI denotes an amplitude difference, Δ phJ denotes a phase difference, I is A, B, C, D, E, F, G, H, and J is A, B, C, D, E, F, G, H.
In the channel balancing method for testing a dual-polarized probe by using the antenna, the method further comprises the following steps: before calculating Δ ph, eight sets of amplitude differences Δ phA, Δ phB, Δ phC, Δ phD, Δ phE, Δ phF, Δ phG, Δ phH are subjected to phase singularity processing.
Correspondingly, the invention also discloses a channel balance system of the antenna test dual-polarized probe, which comprises the following components:
the determining module is used for determining the channel balance initial position of the dual-polarization channel probe according to the polarization type of the antenna to be tested;
the data acquisition module is used for acquiring the amplitudes and phases corresponding to the two polarizations of the dual-polarization channel probe at the initial channel balance position and recording the amplitudes and phases as initial data; rotating the dual-polarization channel probe for multiple times according to a preset rotation rule until the dual-polarization channel probe returns to the initial channel balance position again; simultaneously, acquiring the amplitude and the phase corresponding to two polarizations in each rotation process of the dual-polarized channel probe, and recording the amplitude and the phase as process data;
and the channel balancing module is used for carrying out channel balancing according to the initial data and the process data to obtain channel balancing data.
In the channel balancing system for testing a dual-polarized probe by using the antenna, the determining module is configured to:
if the polarization type of the antenna to be tested is circular polarization, selecting any position as a channel balance initial position;
and if the polarization type of the antenna to be tested is linear polarization, selecting a position with an included angle of 45 degrees with the main polarization as a channel balance initial position.
The invention has the following advantages:
(1) the invention eliminates the twisting influence of the rotary joint and the cable in the traditional channel balancing method, obtains the channel balancing data after eliminating the twisting influence of the rotary joint and the cable by using error cancellation through a mathematical algorithm, and completes the channel balancing by using the antenna testing system on the basis of not adding extra hardware equipment.
(2) According to the invention, a data post-processing mode is adopted, and a measurement error caused by the installation accuracy of the probe is corrected through a mathematical algorithm, so that directional diagram test data after the installation accuracy of the probe is corrected is obtained, and the accuracy requirement of the installation of the plane near-field probe and the working difficulty of mechanical adjustment of the installation of the probe are reduced.
Drawings
FIG. 1 is a schematic diagram of a dual-polarized channel probe link in an embodiment of the invention;
fig. 2 is a schematic flow chart of a channel balancing method for an antenna testing dual-polarized probe according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a circularly polarized channel balance according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a balanced starting position of a linearly polarized channel according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the embodiments of the present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1, the dual-polarized channel probe can directly acquire two orthogonal polarized directional diagram information during testing, so that the problem that the polarization axis of the probe does not need to be rotated, and the problem that a rotary joint or a cable is twisted does not exist during directional diagram testing. However, when the channels are balanced, the most convenient way is to rotate the dual-polarized channel probe by using the polarization axis, align the H and V time-sharing to the same polarization of the antenna to be tested, and collect the acquired signals, compare the amplitude and phase difference, i.e. the result of channel balance, and introduce the influence of different responses at different positions due to the rotation key or the influence of cable twisting along with the rotation of the polarization axis. The specific process is as follows:
as shown in fig. 2, in this embodiment, the method for testing channel balance of a dual-polarized probe by using an antenna includes:
step 101, determining a channel balance initial position of a dual-polarization channel probe according to the polarization type of an antenna to be detected.
In this embodiment, the antenna to be tested and the dual-polarized channel probe may be installed and field calibrated according to a general antenna test method; then, determining a channel balance initial position of the dual-polarization channel probe according to the polarization type of the antenna to be detected: if the polarization type of the antenna to be tested is circular polarization, any position can be selected as a channel balance initial position; and if the polarization type of the antenna to be tested is linear polarization, selecting a position with an included angle of 45 degrees with the main polarization as a channel balance initial position.
And 102, acquiring amplitudes and phases corresponding to two polarizations of the dual-polarization channel probe at a channel balance initial position, and recording the amplitudes and phases as initial data.
In this embodiment, the initial data specifically refers to: h polarization amplitude EH of dual-polarization channel probe when channels balance initial position1Am and phase EH1Ph, and V polarization amplitude EV1Am and phase EV1_ph。
103, rotating the dual-polarized channel probe for multiple times according to a preset rotation rule until the dual-polarized channel probe returns to the initial channel balance position again; and simultaneously, acquiring the amplitude and the phase corresponding to two polarizations in each rotation process of the dual-polarization channel probe, and recording the amplitude and the phase as process data.
In this embodiment, the preset rotation rule specifically means: and the rotation is carried out in turn according to the clockwise direction, each time the rotation is carried out by 90 degrees, the rotation is carried out for 4 times in total, and the channel is returned to the balance initial position again. Namely:
a) the dual-polarized channel probe rotates 90 degrees clockwise from the initial channel balance position, and the H polarization amplitude EH of the dual-polarized channel probe at the moment is acquired2Am and phase EH2Ph, and V polarization amplitude EV2Am and phase EV2_ph。
b) Clockwise rotation is performed again for 90 degrees, and H polarization amplitude EH of the dual-polarization channel probe at the moment is acquired3Am and phase EH3Ph, and V polarization amplitude EV3Am and phase EV3_ph。
c) Clockwise rotation is performed again for 90 degrees, and H polarization amplitude EH of the dual-polarization channel probe at the moment is acquired4Am and phase EH4Ph, and V polarization amplitude EV4Am and phase EV4_ph。
d) Clockwise rotation is performed again for 90 degrees, and H polarization amplitude EH of the dual-polarization channel probe at the moment is acquired5Am and phase EH5Ph, and V polarization amplitude EV5Am and phase EV5_ph。
And 104, carrying out channel balance according to the initial data and the process data to obtain channel balance data.
In this embodiment, steps 102 and 102 may be based on the aboveThe following data acquired in step 103: EH1_am、EH2_am、EH3_am、EH4_am、EH5_am、EH1_ph、EH2_ph、EH3_ph、EH4_ph、EH5_ph、EV1_am、EV2_am、EV3_am、EV4_am、EV5_am、EV1_ph、EV2_ph、EV3_ph、EV4Ph and EV5And (4) solving to obtain an amplitude average value delta am and a phase average value delta ph. And then subtracting delta am from the amplitude of the V-polarized directional diagram tested by the dual-polarized probe, and subtracting delta ph from the phase of the V-polarized directional diagram to obtain directional diagram data after channel balance.
Preferably, the amplitude mean value Δ am and the phase mean value Δ ph are solved as follows:
taking the circularly polarized antenna to be tested as an example, as shown in fig. 3, the circularly polarized channel balance start position can be arbitrarily selected to
Starting for example, 5 sets of amplitude and phase values are acquired according to steps 102-103, and amplitude characteristics of twisting of a rotary joint or a cable are obtained
And phase
Writing in a formula, and making a difference according to the same polarization position pairwise, and considering the condition that the reverse phase difference of a polarization vector is 180 degrees, the following steps are provided:
further, there are:
for the formula (1) and the formula (2), the cancellation is carried out by using 8 groups of difference values respectively, and the influence factors of the rotary joint are removed by considering the formula (3) and the formula (4) simultaneously, wherein the formula comprises the following steps:
that is, the channel balance amplitude and phase value after removing the error caused by the rotation joint or cable twisting is obtained:
Δam＝(ΔamA+ΔamB+ΔamC+ΔamD+ΔamE+ΔamF+ΔamG+ΔamH)/8···(7)
ΔamA＝EV4_am-EH5_am
ΔamB＝EV3_am-EH4_am
ΔamC＝EV2_am-EH3_am
ΔamD＝EV1_am-EH2_am
ΔamE＝EV5_am-EH4_am
ΔamF＝EV4_am-EH3_am
ΔamG＝EV3_am-EH2_am
ΔamH＝EV2_am-EH1_am
Δph＝(ΔphA+ΔphB+ΔphC+ΔphD+ΔphE+ΔphF+ΔphG+ΔphH)/8···(8)
ΔphA＝EV4_ph-EH5_ph
ΔphB＝EV3_ph-EH4_ph
ΔphC＝EV2_ph-EH3_ph
ΔphD＝EV1_ph-EH2_ph
ΔphE＝EV5_ph-EH4_ph-180
ΔphF＝EV4_ph-EH3_ph-180
ΔphG＝EV3_ph-EH2_ph-180
ΔphH＝EV2_ph-EH1_ph-180
in this embodiment, it should be noted that the implementation principle of the linear polarization antenna to be tested is the same as that of the circular polarization antenna to be tested, and details are not repeated. It should be noted that if the linear polarization is unbalanced according to the main polarization cross polarization, since the cross polarization is very low in magnitude, and is affected by the noise floor of the system, and the measured value will greatly fluctuate, the oblique polarization measurement is adopted, that is, as shown in fig. 4, a position starting point inclined by about 45 degrees from the main polarization is selected as a channel balance position, 5 positions are also acquired for amplitude and phase, and then the processing is performed according to the equations (5) and (6).
In the embodiment of the present invention, the phase flipping phenomenon is also considered.
The first condition is as follows: since equation (6) requires averaging 8 sets of phase differences, the phase will flip.
For example, a set of example data is shown in table 1 below:
| position of | H | V |
| 0° | EH1_ph＝-109.5304 | EV1_ph＝-119.4101 |
| 90° | EH2_ph＝151.3088 | EV2_ph＝159.4697 |
| 180° | EH3_ph＝70.1268 | EV3_ph＝60.3098 |
| 270° | EH4_ph＝-28.7924 | EV4_ph＝-20.5606 |
| 360° | EH5_ph＝-109.5601 | EV5_ph＝-119.3853 |
Table 1, when the solution is directly obtained based on the values given in table 1, values Δ phA to Δ phH are shown in table 2:
| ΔphA | 88.9995 | ΔphE | -270.5929 |
| ΔphB | 89.1022 | ΔphF | -270.6874 |
| ΔphC | 89.3429 | ΔphG | -270.999 |
| ΔphD | -270.7189 | ΔphH | 89.0001 |
TABLE 2
As shown in table 2, the values Δ phD, Δ phE, and Δ phF are not in the range of (-180 ° to 180 °), and can be averaged only after being processed, otherwise, an error occurs after averaging, and Δ phA to Δ phH need to be processed into the range of (-180 ° to 180 °), for example, by adding or subtracting 360 °, it is ensured that the values Δ phA to Δ phH are of the same sign (same positive or same negative) and in the range of (-180 ° to 180 °).
Case two: the 8 sets of phase differences are just around-180 deg. or 180 deg., resulting in the phase initial value flipping. At this time, each group of phase differences is processed according to the principle of minimum variance.
For example, a set of example data is shown in table 3 below:
| position of | H | V |
| 0° | EH1_ph＝-20.2304 | EV1_ph＝-119.4101 |
| 90° | EH2_ph＝240.6088 | EV2_ph＝159.4697 |
| 180° | EH3_ph＝159.4268 | EV3_ph＝60.3098 |
| 270° | EH4_ph＝60.5076 | EV4_ph＝-20.5606 |
| 360° | EH5_ph＝-20.2601 | EV5_ph＝-119.3853 |
TABLE 3
The solution was performed directly based on the values given in table 2, and the phase values were classified into the range (-180 °) according to the method of case one, resulting in values of Δ phA- Δ phH as shown in table 4:
| item | Original result | According to the conditionsAfter condition one treatment |
| ΔphA | 179.8929 | 179.8929 |
| ΔphB | 179.9874 | 179.9874 |
| ΔphC | 180.299 | -179.701 |
| ΔphD | -179.7001 | -179.7001 |
| ΔphE | -179.6995 | -179.6995 |
| ΔphF | -179.8022 | -179.8022 |
| ΔphG | -180.0429 | 179.9571 |
| ΔphH | 180.0189 | -179.9811 |
TABLE 4
The original values of Δ phA to Δ phH were processed in a similar manner as shown in table 4, and if the calculation is performed directly according to the data in table 4, a complete error result, i.e. an error result of 0.12 degrees, will be generated, and it is obvious that the average value of 8 groups should be around 180 degrees or-180 degrees.
In order to solve the problem, a principle of minimum variance is introduced, that is, 8 phase differences are classified into two intervals of-180 to 180 degrees and 0 to 360 degrees according to a phase inversion principle, the minimum phase variance is taken as a result to perform the next calculation (note that the processing does not affect a channel balance phase result, because the results represented by the phases with a difference of 360 degrees are completely the same for 10 degrees and 370 degrees in an antenna test), and the results are shown in table 5.
| Phase difference | -180～180 | 0～360 |
| A | 179.8929 | 179.8929 |
| B | 179.9874 | 179.9874 |
| C | -179.701 | 180.299 |
| D | -179.7001 | 180.2999 |
| E | -179.6995 | 180.3005 |
| F | -179.8022 | 180.1978 |
| G | 179.9571 | 179.9571 |
| H | -179.9811 | 180.0189 |
| Variance (variance) | 192.3537117 | 0.172770537 |
TABLE 5
As can be seen from table 5, the right-side phase preprocessing result is selected because the right-side variance is smaller, and then the next calculation is performed, so as to obtain the correct result.
On the basis of the above embodiment, the present invention also discloses a channel balancing system of an antenna testing dual-polarized probe, comprising: the determining module is used for determining the channel balance initial position of the dual-polarization channel probe according to the polarization type of the antenna to be tested; the data acquisition module is used for acquiring the amplitudes and phases corresponding to the two polarizations of the dual-polarization channel probe at the initial channel balance position and recording the amplitudes and phases as initial data; rotating the dual-polarization channel probe for multiple times according to a preset rotation rule until the dual-polarization channel probe returns to the initial channel balance position again; simultaneously, acquiring the amplitude and the phase corresponding to two polarizations in each rotation process of the dual-polarized channel probe, and recording the amplitude and the phase as process data; and the channel balancing module is used for carrying out channel balancing according to the initial data and the process data to obtain channel balancing data.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make variations and modifications of the present invention without departing from the spirit and scope of the present invention by using the methods and technical contents disclosed above.
Those skilled in the art will appreciate that the invention may be practiced without these specific details.
Claims (10)
1. A channel balancing method for an antenna test dual-polarized probe is characterized by comprising the following steps:
determining a channel balance initial position of a dual-polarization channel probe according to the polarization type of the antenna to be tested;
acquiring amplitudes and phases corresponding to two polarizations of the dual-polarization channel probe at a channel balance initial position, and recording the amplitudes and phases as initial data;
rotating the dual-polarization channel probe for multiple times according to a preset rotation rule until the dual-polarization channel probe returns to the initial channel balance position again; simultaneously, acquiring the amplitude and the phase corresponding to two polarizations in each rotation process of the dual-polarized channel probe, and recording the amplitude and the phase as process data;
and carrying out channel balance according to the initial data and the process data to obtain channel balance data.
2. The method for balancing the channels of the antenna test dual-polarized probe according to claim 1, wherein the determining the initial position of the channel balance of the dual-polarized channel probe according to the polarization type of the antenna to be tested comprises:
if the polarization type of the antenna to be tested is circular polarization, selecting any position as a channel balance initial position;
and if the polarization type of the antenna to be tested is linear polarization, selecting a position with an included angle of 45 degrees with the main polarization as a channel balance initial position.
3. The method for balancing the channels of the antenna testing dual-polarized probe according to claim 1, further comprising: and according to the universal antenna test method, the antenna to be tested and the dual-polarized channel probe are installed and field calibrated.
4. The channel balancing method for the antenna testing dual-polarized probe according to claim 1, wherein the preset rotation rule is as follows: and the rotation is carried out in turn according to the clockwise direction, each time the rotation is carried out by 90 degrees, the rotation is carried out for 4 times in total, and the channel is returned to the balance initial position again.
5. The method for antenna testing of channel balancing of a dual polarized probe according to claim 4,
initial data, comprising: h polarization amplitude EH of dual-polarization channel probe when channels balance initial position1Am and phase EH1Ph, and V polarization amplitude EV1Am and phase EV1_ph；
Process data, comprising:
after the probe rotates clockwise for 90 degrees for the first time, the H polarization amplitude EH of the dual-polarization channel probe2Am and phase EH2Ph, and V polarization amplitude EV2Am and phase EV2_ph；
After the probe rotates clockwise for 90 degrees for the second time, the H polarization amplitude EH of the dual-polarization channel probe3Am and phase EH3Ph, and V polarization amplitude EV3Am and phase EV3_ph；
After the probe rotates clockwise for 90 degrees for the third time, the H polarization amplitude EH of the dual-polarization channel probe4Am and phase EH4Ph, and V polarization amplitude EV4Am and phase EV4_ph；
After the fourth clockwise rotation is carried out for 90 degrees, the H polarization amplitude EH of the dual-polarization channel probe5Am and phase EH5Ph, and V polarization amplitude EV5Am and phase EV5_ph。
6. The method for balancing the channels of the antenna test dual-polarized probe according to claim 5, wherein channel balancing is performed according to the initial data and the process data to obtain channel balancing data, and the method comprises:
according to EH1_am、EH2_am、EH3_am、EH4_am、EH5_am、EH1_ph、EH2_ph、EH3_ph、EH4_ph、EH5_ph、EV1_am、EV2_am、EV3_am、EV4_am、EV5_am、EV1_ph、EV2_ph、EV3_ph、EV4Ph and EV5Phi, resolving to obtain an amplitude average value delta am and a phase average value delta ph;
and subtracting delta am from the amplitude of the V-polarized directional diagram tested by the dual-polarized probe, and subtracting delta ph from the phase of the V-polarized directional diagram to obtain directional diagram data after channel balance.
7. The channel balancing method for the antenna testing dual-polarized probe according to claim 6, wherein the amplitude mean value Δ am and the phase mean value Δ ph are calculated as follows:
ΔamA＝EV4_am-EH5_am
ΔamB＝EV3_am-EH4_am
ΔamC＝EV2_am-EH3_am
ΔamD＝EV1_am-EH2_am
ΔamE＝EV5_am-EH4_am
ΔamF＝EV4_am-EH3_am
ΔamG＝EV3_am-EH2_am
ΔamH＝EV2_am-EH1_am
comprises the following steps:
Δam＝(ΔamA+ΔamB+ΔamC+ΔamD+ΔamE+ΔamF+ΔamG+ΔamH)/8
ΔphA＝EV4_ph-EH5_ph
ΔphB＝EV3_ph-EH4_ph
ΔphC＝EV2_ph-EH3_ph
ΔphD＝EV1_ph-EH2_ph
ΔphE＝EV5_ph-EH4_ph-180
ΔphF＝EV4_ph-EH3_ph-180
ΔphG＝EV3_ph-EH2_ph-180
ΔphH＝EV2_ph-EH1_ph-180
comprises the following steps:
Δph＝(ΔphA+ΔphB+ΔphC+ΔphD+ΔphE+ΔphF+ΔphG+ΔphH)/8
where Δ amI denotes an amplitude difference, Δ phJ denotes a phase difference, I is A, B, C, D, E, F, G, H, and J is A, B, C, D, E, F, G, H.
8. The method for antenna testing of channel balancing of a dual polarized probe according to claim 7, further comprising: before calculating Δ ph, eight sets of amplitude differences Δ phA, Δ phB, Δ phC, Δ phD, Δ phE, Δ phF, Δ phG, Δ phH are subjected to phase singularity processing.
9. A channel balancing system for an antenna testing dual-polarized probe, comprising:
the determining module is used for determining the channel balance initial position of the dual-polarization channel probe according to the polarization type of the antenna to be tested;
the data acquisition module is used for acquiring the amplitudes and phases corresponding to the two polarizations of the dual-polarization channel probe at the initial channel balance position and recording the amplitudes and phases as initial data; rotating the dual-polarization channel probe for multiple times according to a preset rotation rule until the dual-polarization channel probe returns to the initial channel balance position again; simultaneously, acquiring the amplitude and the phase corresponding to two polarizations in each rotation process of the dual-polarized channel probe, and recording the amplitude and the phase as process data;
and the channel balancing module is used for carrying out channel balancing according to the initial data and the process data to obtain channel balancing data.
10. The system for antenna testing of channel balancing of a dual polarized probe according to claim 9, characterized by a determining module for:
if the polarization type of the antenna to be tested is circular polarization, selecting any position as a channel balance initial position;
and if the polarization type of the antenna to be tested is linear polarization, selecting a position with an included angle of 45 degrees with the main polarization as a channel balance initial position.
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