CN113820548B - Antenna axial ratio measuring device, method, equipment and storage medium - Google Patents
Antenna axial ratio measuring device, method, equipment and storage medium Download PDFInfo
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- CN113820548B CN113820548B CN202111389508.1A CN202111389508A CN113820548B CN 113820548 B CN113820548 B CN 113820548B CN 202111389508 A CN202111389508 A CN 202111389508A CN 113820548 B CN113820548 B CN 113820548B
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Abstract
The embodiment of the application provides a device, a method, equipment and a storage medium for measuring the antenna axial ratio, wherein the device comprises: the system comprises a tested antenna, a standard antenna group, a network analyzer and a plurality of coaxial wires, wherein the standard antenna group consists of a left-handed polarized antenna and a right-handed polarized antenna which have the same gain, the plurality of coaxial wires comprise a first coaxial wire and a second coaxial wire, the tested antenna is fixed on a first preset antenna bracket, and the left-handed polarized antenna or the right-handed polarized antenna is installed on a second preset antenna bracket and has the direction related to the direction of the tested antenna; the tested antenna is connected with a network analyzer through a first coaxial line, and the network analyzer is connected with the left-handed polarized antenna or the right-handed polarized antenna through a second coaxial line; and the network analyzer is used for measuring the insertion loss between the antenna to be measured and each antenna in the standard antenna group, and the insertion loss is used for supporting the calculation of the axial ratio of the antenna to be measured. The embodiment of the application can quickly and effectively measure the axial ratio of the antenna and can save cost.
Description
Technical Field
The embodiment of the application relates to the technical field of measurement, in particular to a device, a method and equipment for measuring an antenna axial ratio and a storage medium.
Background
With the vigorous development of global positioning systems and Beidou navigation systems, the navigation systems are beginning to penetrate the aspects of daily life of people, and more intelligent terminal devices are equipped with the navigation systems. For a navigation system, the performance of the antenna is a key factor affecting the positioning accuracy.
For a satellite navigation system, a right-hand polarized antenna is generally adopted by a satellite as a transmitting antenna, and a right-hand polarized antenna is generally adopted by a receiving antenna of a terminal. However, if linearly polarized antenna reception is used, 3dB of performance will be lost; if the left-hand polarization antenna is used for receiving, the transmitted signal cannot be received. Therefore, the polarization and axial ratio of the antenna are two important indicators for measuring the performance of the antenna.
At present, in most cases, the axial ratio of the antenna is measured by adopting a mode of a turntable and a linear polarization antenna. And rotating the linear polarization antenna for 360 degrees, measuring the maximum value and the minimum value, and then calculating to obtain the axial ratio of the antenna. However, the turntable is relatively expensive to manufacture, and the 360-degree test speed is relatively slow, thereby being inefficient. Therefore, the prior art cannot quickly and effectively measure the axial ratio of the antenna, and cannot save the cost.
Disclosure of Invention
The embodiment of the application provides a device, a method and equipment for measuring the axial ratio of an antenna and a storage medium, which can quickly and effectively measure the axial ratio of the antenna and can save the cost.
In a first aspect, an embodiment of the present application provides an apparatus for measuring an antenna axial ratio, where the apparatus includes:
the antenna comprises a tested antenna, a standard antenna group, a network analyzer and a plurality of coaxial wires, wherein the standard antenna group consists of a left-handed polarized antenna and a right-handed polarized antenna which have the same gain, the plurality of coaxial wires comprise a first coaxial wire and a second coaxial wire, the tested antenna is fixed on a first preset antenna bracket, the left-handed polarized antenna or the right-handed polarized antenna is installed on a second preset antenna bracket, and the direction of the left-handed polarized antenna or the right-handed polarized antenna is associated with the direction of the tested antenna;
the tested antenna is connected with the network analyzer through the first coaxial line, and the network analyzer is connected with the left-handed polarized antenna or the right-handed polarized antenna through the second coaxial line;
the network analyzer is used for measuring insertion loss between the antenna to be measured and each antenna in the standard antenna group, and the insertion loss is used for supporting calculation of axial ratio of the antenna to be measured.
In one possible design, the insertion loss comprises a first insertion loss;
the left-hand polarization antenna is arranged at a preset position of the second preset antenna bracket, and the direction of the left-hand polarization antenna is opposite to that of the antenna to be tested;
correspondingly, the network analyzer is connected with the left-hand polarization antenna through the second coaxial line and is used for measuring the first insertion loss between the antenna to be measured and the left-hand polarization antenna.
In one possible design, the insertion loss further includes a second insertion loss;
the left-hand polarization antenna installed at the preset position is removed, the right-hand polarization antenna is installed at the preset position, and the direction of the right-hand polarization antenna is opposite to that of the antenna to be measured;
correspondingly, the network analyzer is connected with the right-hand polarization antenna through the second coaxial line and is used for measuring a second insertion loss between the antenna to be measured and the right-hand polarization antenna.
In one possible design, a difference between the first insertion loss and the second insertion loss is used to calculate an antenna cross-polarization isolation; and the antenna cross polarization isolation is used for supporting the calculation of the axial ratio of the antenna to be tested.
In one possible design, the axial ratio of the tested antenna is determined by the antenna cross polarization isolation and an axial ratio calculation model;
the axial ratio calculation model is XPD =24.8-20 x lgAR, wherein XPD represents the antenna cross polarization isolation, and AR represents the axial ratio of the measured antenna.
In one possible design, if the first insertion loss is greater than the second insertion loss, the polarization direction of the antenna under test is left-hand polarization;
and if the first insertion loss is smaller than the second insertion loss, the polarization direction of the antenna to be tested is right-hand polarization.
In a second aspect, an embodiment of the present application provides a method for measuring an antenna axial ratio, which is applied to the apparatus according to the first aspect and any one of various possible designs, and the method includes:
a left-hand polarization antenna in the device is installed on a second preset antenna support, the direction of the left-hand polarization antenna and the direction of the antenna to be measured are arranged in opposite directions, and meanwhile, when the network analyzer is connected with the left-hand polarization antenna through the second coaxial line, the first insertion loss between the antenna to be measured and the left-hand polarization antenna is measured through the network analyzer;
the left-hand polarization antenna in the device is removed, the right-hand polarization antenna in the device is installed on the second preset antenna support, the direction of the right-hand polarization antenna and the direction of the antenna to be measured are arranged in opposite directions, and meanwhile, when the network analyzer is connected with the right-hand polarization antenna through the second coaxial line, the second insertion loss between the antenna to be measured and the right-hand polarization antenna is measured through the network analyzer;
and calculating the axial ratio of the antenna to be measured according to the first insertion loss and the second insertion loss.
In one possible design, calculating an axial ratio of the antenna under test based on the first insertion loss and the second insertion loss includes:
calculating a difference value between the first insertion loss and the second insertion loss according to the first insertion loss and the second insertion loss to obtain antenna cross polarization isolation;
calculating to obtain the axial ratio of the antenna to be measured through an axial ratio calculation model according to the antenna cross polarization isolation;
and the axial ratio calculation model is XPD =24.8-20 × lgAR, wherein XPD represents the antenna cross polarization isolation, and AR represents the axial ratio of the measured antenna.
In one possible design, the method further includes:
and determining the polarization direction of the antenna to be tested according to the first insertion loss and the second insertion loss.
In one possible design, the determining the polarization direction of the antenna under test according to the first insertion loss and the second insertion loss includes:
if the first insertion loss is larger than the second insertion loss, determining that the polarization direction of the antenna to be tested is left-hand polarization;
and if the first insertion loss is smaller than the second insertion loss, determining that the polarization direction of the antenna to be tested is right-hand polarization.
In a third aspect, an embodiment of the present application provides a data processing apparatus, including: at least one processor and memory;
the memory stores computer-executable instructions;
the at least one processor executing the computer-executable instructions stored by the memory causes the at least one processor to perform the method of measuring antenna axis ratio as set forth in the second aspect and any one of the various possible designs.
In a fourth aspect, embodiments of the present application provide a computer-readable storage medium, in which computer-executable instructions are stored, and when a processor executes the computer-executable instructions, the method for measuring an antenna axial ratio according to any one of the second aspect and various possible designs is implemented.
In a fifth aspect, the present application provides a computer program product, which includes a computer program, and when the computer program is executed by a processor, the method for measuring the antenna axial ratio according to the second aspect and any one of various possible designs is implemented.
The measuring device of the antenna axial ratio comprises a measured antenna, a standard antenna group, a network analyzer and a plurality of coaxial lines, wherein the plurality of coaxial lines comprise a first coaxial line and a second coaxial line, the measured antenna is fixed on a first preset antenna bracket, a left-handed polarized antenna or a right-handed polarized antenna is installed on a second preset antenna bracket, and the directions of the left-handed polarized antenna or the right-handed polarized antenna are associated with the direction of the measured antenna; the tested antenna is connected with the network analyzer through the first coaxial line, the network analyzer is connected with the left-hand polarization antenna or the right-hand polarization antenna through the second coaxial line, and the network analyzer is used for measuring insertion loss between the tested antenna and each antenna in the standard antenna group, wherein the insertion loss is used for supporting data processing equipment to calculate the axial ratio of the tested antenna. Because the antenna in the standard antenna group is a circularly polarized antenna, the rotation is not required to be 360 degrees, the association is respectively established between the left-handed polarized antenna and the right-handed polarized antenna with the same gain and the antenna to be tested, and the axial ratio of the antenna to be tested can be calculated by respectively measuring the insertion loss of the antenna to be tested and each antenna in the standard antenna group by using a network analyzer. Therefore, the axial ratio of the antenna can be measured quickly and effectively, and meanwhile cost can be saved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a schematic application flow diagram of an antenna axial ratio measurement provided in an embodiment of the present application;
FIG. 2 is a schematic diagram of an apparatus for measuring an antenna axial ratio according to an embodiment of the present disclosure;
fig. 3 is a schematic diagram of an antenna axial ratio measuring device and a data processing apparatus according to an embodiment of the present disclosure;
fig. 4 is a schematic flowchart of a method for measuring an antenna axial ratio according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of a data processing apparatus according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims of the present application and in the above-described drawings (if any) are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
At present, the tested antenna is generally tested by adopting a linearly polarized antenna and a rotary table. During the test the turntable needs to be rotated 360 degrees and the insertion loss (S12 value) is recorded for each angle and the maximum and minimum values are sorted out. The axial ratio of the measured antenna is equal to the maximum minus the minimum, i.e., AR = S12(MAX) -S12 (MIN). The test of the scheme requires the antenna to rotate for one circle and records values of different angles of one circle, so the test speed is slow. In addition, the price of the rotary table is high, and the testing cost is increased. Therefore, the prior art cannot quickly and effectively measure the axial ratio of the antenna, and cannot save the cost.
In order to solve the problems, the technical idea of the application is to configure a left-handed polarized antenna and a right-handed polarized antenna with the same gain as a standard antenna group, install the left-handed polarized antenna to form an opposite position relation with a measured antenna, measure the insertion loss between the left-handed polarized antenna and the measured antenna by using a network analyzer, then remove the left-handed polarized antenna and install the right-handed polarized antenna, form an opposite position relation with the measured antenna, measure the insertion loss between the right-handed polarized antenna and the measured antenna by using the network analyzer, and calculate the axial ratio of the measured antenna according to the two insertion losses.
Exemplarily, in combination with the schematic application flow diagram of the antenna axial ratio measurement shown in fig. 1, a parameter for calculating the axial ratio of the measured antenna is measured by the antenna axial ratio measurement device, the parameter is received or acquired by the data processing device as an input quantity of the axial ratio calculation model, and the axial ratio of the measured antenna is output by the axial ratio calculation model.
Specifically, the device for measuring the antenna axial ratio adopts a set of standard antennas with left-handed polarization and right-handed polarization (namely, the standard antenna set comprises a left-handed polarization antenna and a right-handed polarization antenna), and measures the insertion loss between the left-handed polarization antenna and the antenna to be measured and the insertion loss between the right-handed polarization antenna and the antenna to be measured respectively through a network analyzer, and calculates the antenna cross polarization isolation XPD based on the two insertion losses. Then, calculating a model according to the axial ratio: XPD =24.8-20 x lgAR, and calculating the axial ratio AR (dB) of the antenna to be measured.
The technical solution of the present application will be described in detail below with specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.
Fig. 2 is a schematic view of an antenna axial ratio measurement device provided in an embodiment of the present application, where the antenna axial ratio measurement device may be applied to a usage scenario of antenna performance measurement. The device for measuring the antenna axial ratio can comprise a measured antenna 1, a standard antenna group, a network analyzer 3 and a plurality of coaxial lines 4.
The standard antenna group comprises a left-handed polarized antenna and a right-handed polarized antenna which have the same gain, namely the standard antenna group comprises two standard antennas 2, the coaxial lines 4 comprise a first coaxial line and a second coaxial line, the antenna 1 to be measured is fixed on a first preset antenna bracket, the left-handed polarized antenna or the right-handed polarized antenna is arranged on a second preset antenna bracket, and the direction of the left-handed polarized antenna or the right-handed polarized antenna is associated with the direction of the antenna 1 to be measured.
The tested antenna 1 is connected with the network analyzer 3 through the first coaxial line, and the network analyzer 3 is connected with the left-handed polarized antenna or the right-handed polarized antenna through the second coaxial line; the network analyzer 3 is used for measuring the insertion loss between the antenna to be measured 1 and each antenna in the standard antenna group, and the insertion loss is used for supporting the calculation of the axial ratio of the antenna to be measured 1.
In this embodiment, a circularly polarized antenna is used as a standard antenna, and in order to ensure the accuracy of axial ratio measurement, the standard antenna group herein uses two left-handed polarized antennas or right-handed polarized antennas with the same gain, and is fixed on an antenna bracket (i.e., a second preset antenna bracket), and the antenna 1 to be measured is fixed on a first preset antenna bracket and is connected with the network analyzer 3 through a coaxial cable.
In particular, the coaxial cable is composed of two coaxial lines 4, which are used to connect the antenna with the network analyzer. I.e. one coaxial line 4 (i.e. the first coaxial line) is used for connecting the network analyzer 3 and the antenna 1 under test, and the other coaxial line 4 (i.e. the second coaxial line) is used for connecting the network analyzer 3 and the standard antenna 2.
Fixing the antenna 1 to be tested on a first preset antenna bracket, and then connecting the antenna 1 to be tested and a network analyzer 3 by using a first coaxial line; the left-hand polarization antenna is installed on a second preset antenna support, the second coaxial line is used for connecting the left-hand polarization antenna and the network analyzer 3, the directions of the left-hand polarization antenna and the tested antenna 1 are adjusted, after the directions are confirmed, the left-hand polarization antenna serves as a standard antenna 2, and the network analyzer 3 measures and obtains the insertion loss between the tested antenna 1 and the left-hand polarization antenna; and then the left-hand polarization antenna is removed, a right-hand polarization antenna is installed on a second preset antenna support, the directions of the right-hand polarization antenna and the measured antenna 1 are adjusted, after the directions are confirmed, the right-hand polarization antenna serves as a standard antenna 2, and the network analyzer 3 measures the insertion loss between the measured antenna 1 and the right-hand polarization antenna.
The present application may further provide a system for measuring an antenna axial ratio, which combines the schematic diagram of the apparatus for measuring an antenna axial ratio and the data processing device shown in fig. 3, where the system for measuring an antenna axial ratio includes the apparatus for measuring an antenna axial ratio and the data processing device, or the apparatus for measuring an antenna axial ratio may further include the data processing device. The data processing device is used for obtaining the insertion loss measured by the network analyzer 3 and further calculating the axial ratio of the antenna 1 to be measured. Specifically, the network analyzer 3 transmits the measured insertion loss between the antenna under test 1 and the left-hand polarization antenna and the measured insertion loss between the antenna under test 1 and the right-hand polarization antenna to the data processing device for calculating the axial ratio of the antenna under test 1.
In addition, the axial ratio of the antenna to be measured can be calculated by editing a calculation formula (namely an axial ratio calculation model) of the axial ratio in a table mode, and the axial ratio of the antenna to be measured can be obtained by inputting insertion loss measured by a network analyzer.
The network analyzer 3 then transmits the measured first insertion loss and second insertion loss to the data processing device for calculating the axial ratio of the measured antenna.
The measuring device for the antenna axial ratio provided by the embodiment of the application is provided with a measured antenna, a standard antenna group, a network analyzer and a plurality of coaxial lines, wherein the plurality of coaxial lines comprise a first coaxial line and a second coaxial line, the measured antenna is fixed on a first preset antenna bracket, the left-handed polarized antenna or the right-handed polarized antenna is arranged on a second preset antenna bracket, and the direction of the left-handed polarized antenna or the direction of the right-handed polarized antenna is associated with the direction of the measured antenna; the tested antenna is connected with the network analyzer through the first coaxial line, the network analyzer is connected with the left-hand polarization antenna or the right-hand polarization antenna through the second coaxial line, and the network analyzer is used for measuring insertion loss between the tested antenna and each antenna in the standard antenna group, wherein the insertion loss is used for supporting data processing equipment to calculate the axial ratio of the tested antenna. Because the antenna in the standard antenna group is a circularly polarized antenna, the rotation is not required to be 360 degrees, the association is respectively established between the left-handed polarized antenna and the right-handed polarized antenna with the same gain and the antenna to be tested, and the axial ratio of the antenna to be tested can be calculated by respectively measuring the insertion loss of the antenna to be tested and each antenna in the standard antenna group by using a network analyzer. Therefore, the axial ratio of the antenna can be measured quickly and effectively, and meanwhile cost can be saved.
In a possible design, the present embodiment provides a detailed description of how to specifically install the standard antenna set and measure the insertion loss based on the above embodiments. Wherein the insertion loss comprises a first insertion loss and a second insertion loss.
Specifically, the left-hand polarized antenna is installed as a standard antenna: the left-hand polarization antenna is installed at a preset position of the second preset antenna support, and the direction of the left-hand polarization antenna is opposite to that of the antenna to be tested.
Correspondingly, the network analyzer is connected with the left-hand polarization antenna through the second coaxial line and is used for measuring the first insertion loss between the antenna to be measured and the left-hand polarization antenna.
In this embodiment, the standard antenna with left-hand polarization (i.e., the left-hand polarization antenna) is fixed on the antenna support (e.g., the second predetermined antenna support), and then the standard antenna with left-hand polarization and the network analyzer are connected by a coaxial cable (e.g., the second coaxial cable). The direction of the standard antenna with the left polarization is adjusted to be the position direction opposite to the direction of the antenna to be measured, so that the measurement accuracy and the data effectiveness are improved conveniently. After the directions of the antenna to be measured and the standard antenna with the left-hand polarization are confirmed, the network analyzer can measure the insertion loss between the antenna to be measured and the standard antenna with the left-hand polarization, namely the first insertion loss.
Then, the right-hand polarized antenna is installed as a standard antenna: and the left-hand polarization antenna installed at the preset position is removed, the right-hand polarization antenna is installed at the preset position, and the direction of the right-hand polarization antenna is opposite to that of the antenna to be tested.
Correspondingly, the network analyzer is connected with the right-hand polarization antenna through the second coaxial line and is used for measuring a second insertion loss between the antenna to be measured and the right-hand polarization antenna.
In this embodiment, the original standard antenna with left-hand polarization is removed, and the standard antenna with right-hand polarization (i.e., the right-hand polarization antenna) is replaced, and then the standard antenna with right-hand polarization and the network analyzer are connected by a coaxial cable (e.g., the second coaxial cable). The direction of the standard antenna with right-hand polarization is adjusted to be the position direction opposite to the direction of the antenna to be measured, so that the measurement accuracy and the data effectiveness are improved conveniently. After the directions of the antenna to be measured and the standard antenna with right-hand polarization are confirmed, the network analyzer can measure the insertion loss between the antenna to be measured and the standard antenna with right-hand polarization, that is, the second insertion loss.
And then, obtaining the axial ratio of the antenna to be measured through the first insertion loss and the second insertion loss.
It should be noted that the order of installing the left-hand polarization antenna and the right-hand polarization antenna is not specifically limited in this embodiment, and the above embodiment is merely exemplary.
In a possible design, the present embodiment provides a detailed description of the calculation of the axial ratio by using the parameters such as the first insertion loss and the second insertion loss on the basis of the above-described embodiments. The difference between the first insertion loss and the second insertion loss is used for calculating the antenna cross polarization isolation; and the antenna cross polarization isolation is used for supporting the calculation of the axial ratio of the antenna to be tested.
In this embodiment, a difference between the first insertion loss and the second insertion loss is first calculated, and then an absolute value of the difference is taken to obtain the antenna cross polarization isolation. Namely: XPD = | S12(L) -S12(R) |; where XPD denotes antenna cross-polarization isolation (i.e., the absolute value of the difference between the first insertion loss and the second insertion loss), S12(L) denotes the first insertion loss, and S12(R) denotes the second insertion loss; and then calculating the axial ratio of the antenna to be measured according to the cross polarization isolation XPD of the antenna.
In a possible design, the present embodiment provides a detailed description of the calculation of the axial ratio by using the antenna cross polarization isolation XPD on the basis of the above-described embodiments. The axial ratio of the antenna to be measured is determined through the antenna cross polarization isolation and an axial ratio calculation model; the axial ratio calculation model is XPD =24.8-20 x lgAR, wherein AR represents the axial ratio of the measured antenna.
In this embodiment, the axial ratio calculation model is obtained by performing data modeling through a large amount of experimental data, such as data fitting, and is not specifically limited herein. The axial ratio calculation model can be configured in data processing equipment or a table, when parameters such as antenna cross polarization isolation XPD are known, the axial ratio of the antenna to be measured can be output by taking the parameters as input quantity of the axial ratio calculation model, the calculation efficiency is high, meanwhile, during measurement, a rotary table does not need to be rotated by 360 degrees, S12 values of each angle are recorded, the maximum value and the minimum value are selected, and then the difference value of the maximum value and the minimum value is calculated to be used as the axial ratio of the antenna to be measured. Therefore, cost is saved and measurement efficiency is improved.
In one possible design, the antenna axial ratio measuring device can determine the polarization direction of the antenna to be measured besides quickly and effectively measuring the axial ratio. That is, if the first insertion loss is greater than the second insertion loss, the polarization direction of the antenna to be tested is left-hand polarization; and if the first insertion loss is smaller than the second insertion loss, the polarization direction of the antenna to be tested is right-hand polarization.
Specifically, the polarization direction of the antenna to be tested can be determined according to the magnitude of two values of S12(L) and S (12) R, wherein S12(L) is left-handed polarization, and S12(R) is right-handed polarization.
In this embodiment, the antenna to be tested is tested by using standard antennas with left-hand polarization and right-hand polarization, and then the axial ratio ar (db) and the polarization direction of the antenna are calculated according to the two measurement results. Specifically, the antenna under test was tested using a set of standard antennas (shown in connection with fig. 2) with left-hand polarization and right-hand polarization and the measurements S12(R) and S12(L) were recorded and the antenna cross polarization isolation XPD was calculated. Then according to the formula: XPD =24.8-20 × lgAR, and calculating an antenna axial ratio AR (dB). Meanwhile, if S12(L) is greater than S12(R), the polarization direction of the antenna under test is left-hand polarization, whereas if S12(R) is greater than S12(L), the polarization direction of the antenna under test is right-hand polarization.
Therefore, the left-hand polarization antenna and the right-hand polarization antenna with the same gain are configured as a standard antenna group, the left-hand polarization antenna is installed to form an opposite position relation with the antenna to be tested, the network analyzer is used for measuring the insertion loss between the left-hand polarization antenna and the antenna to be tested, then the left-hand polarization antenna is disassembled, the right-hand polarization antenna is installed to form an opposite position relation with the antenna to be tested, the network analyzer is used for measuring the insertion loss between the right-hand polarization antenna and the antenna to be tested, the axial ratio of the antenna to be tested is calculated according to the two insertion losses, compared with the prior art, a rotary table is not needed, 360 degrees do not need to be tested, the testing cost is reduced, and the testing efficiency is improved.
Referring to fig. 4, fig. 4 is a schematic flowchart of a method for measuring an antenna axial ratio according to an embodiment of the present application; the method is applied to the antenna axial ratio measuring device in the embodiment. The method comprises the following steps:
s401, a left-hand polarization antenna in the device is installed on a second preset antenna support, the direction of the left-hand polarization antenna and the direction of the antenna to be tested are arranged in opposite directions, and meanwhile, when the network analyzer is connected with the left-hand polarization antenna through the second coaxial line, the first insertion loss between the antenna to be tested and the left-hand polarization antenna is measured through the network analyzer.
S402, the left-hand polarization antenna in the device is detached, the right-hand polarization antenna in the device is installed on the second preset antenna support, the direction of the right-hand polarization antenna and the direction of the antenna to be measured are arranged in opposite directions, and meanwhile, when the network analyzer is connected with the right-hand polarization antenna through the second coaxial line, the second insertion loss between the antenna to be measured and the right-hand polarization antenna is measured through the network analyzer.
And S403, calculating the axial ratio of the antenna to be tested according to the first insertion loss and the second insertion loss.
In this embodiment, the data processing device or the measuring apparatus for the antenna axial ratio installed with the data processing device may be used as an execution main body, and is not particularly limited herein. Specifically, taking the left-handed polarized antenna as an example and taking the data processing device as an execution main body, the data processing device is communicatively connected with the network analyzer for data transmission, and the connection mode here is not specifically limited, and is shown in fig. 3. The antenna to be tested is fixed on an antenna support (such as a first preset antenna support), the antenna to be tested is connected with the network tester by a coaxial line (such as a first coaxial line), the standard antenna with the left-hand polarization (namely, the left-hand polarization antenna) is fixed on the antenna support (such as a second preset antenna support), and then the standard antenna with the left-hand polarization and the network analyzer are connected by the coaxial line (such as a second coaxial line). The direction of the standard antenna with the left polarization is adjusted to be the position direction opposite to the direction of the antenna to be measured, so that the measurement accuracy and the data effectiveness are improved conveniently. After the directions of the antenna to be measured and the standard antenna with the left-hand polarization are confirmed, the insertion loss between the antenna to be measured and the standard antenna with the left-hand polarization, namely the first insertion loss, can be measured through a network analyzer.
Then, the original standard antenna with left-hand polarization is removed, and replaced with the standard antenna with right-hand polarization (i.e., right-hand polarization antenna), and then a coaxial line (e.g., a second coaxial line) is used to connect the standard antenna with right-hand polarization and the network analyzer. The direction of the standard antenna with right-hand polarization is adjusted to be the position direction opposite to the direction of the antenna to be measured, so that the measurement accuracy and the data effectiveness are improved conveniently. After the directions of the antenna to be measured and the standard antenna with right-hand polarization are confirmed, the insertion loss between the antenna to be measured and the standard antenna with right-hand polarization, namely the second insertion loss, can be measured through the network analyzer. Then, the data processing device receives the first insertion loss and the second insertion loss measured by the network analyzer to obtain the axial ratio of the antenna to be measured.
In this embodiment, a left-hand polarized antenna and a right-hand polarized antenna with the same gain are used as a standard antenna group, the left-hand polarized antenna is installed to form an opposite position relation with a measured antenna, the network analyzer is used to measure the insertion loss between the left-hand polarized antenna and the measured antenna, the left-hand polarized antenna is removed, the right-hand polarized antenna is installed to form an opposite position relation with the measured antenna, the network analyzer is used to measure the insertion loss between the right-hand polarized antenna and the measured antenna, and the axial ratio of the measured antenna is calculated according to the two insertion losses.
In a possible design, the present embodiment provides a detailed description of S403 on the basis of the above embodiments. Calculating the axial ratio of the measured antenna according to the first insertion loss and the second insertion loss, which can be realized by the following steps:
step a1, calculating the difference between the first insertion loss and the second insertion loss according to the first insertion loss and the second insertion loss to obtain the antenna cross polarization isolation.
Step a2, calculating the axial ratio of the antenna to be measured through an axial ratio calculation model according to the antenna cross polarization isolation.
The axial ratio calculation model is XPD =24.8-20 × lgAR, wherein XPD represents antenna cross polarization isolation (i.e. the absolute value of the difference between the first insertion loss and the second insertion loss), and AR represents the axial ratio of the tested antenna.
In this embodiment, the axial ratio calculation model is obtained by performing data modeling through a large amount of experimental data, such as data fitting, and is not specifically limited herein. The axial ratio calculation model can be configured in data processing equipment or a table, when parameters such as antenna cross polarization isolation XPD are known, the axial ratio of the antenna to be measured can be output by taking the parameters as input quantity of the axial ratio calculation model, the calculation efficiency is high, meanwhile, during measurement, a rotary table does not need to be rotated by 360 degrees, S12 values of each angle are recorded, the maximum value and the minimum value are selected, and then the difference value of the maximum value and the minimum value is calculated to be used as the axial ratio of the antenna to be measured. Therefore, the cost is saved, the data processing speed is increased, and the measurement efficiency is improved.
In a possible design, the present embodiment describes in detail a method for measuring the antenna axial ratio based on the above-described embodiments. And determining the polarization direction of the antenna to be tested according to the first insertion loss and the second insertion loss.
In this embodiment, the method for measuring the antenna axial ratio can determine the polarization direction of the antenna to be measured, in addition to measuring the axial ratio quickly and effectively. If the first insertion loss is larger than the second insertion loss, determining that the polarization direction of the antenna to be tested is left-hand polarization; and if the first insertion loss is smaller than the second insertion loss, determining that the polarization direction of the antenna to be tested is right-hand polarization.
Specifically, the polarization direction of the antenna to be tested can be determined according to the magnitude of two values of S12(L) and S (12) R, wherein S12(L) is left-handed polarization, and S12(R) is right-handed polarization.
In this embodiment, the antenna to be tested is tested by using standard antennas with left-hand polarization and right-hand polarization, and then the axial ratio ar (db) and the polarization direction of the antenna are calculated according to the two measurement results. Specifically, the antenna under test was tested using a set of standard antennas (shown in connection with fig. 2) with left-hand polarization and right-hand polarization and the measurements S12(R) and S12(L) were recorded and the antenna cross polarization isolation XPD was calculated. Then according to the formula: XPD =24.8-20 × lgAR, and calculating an antenna axial ratio AR (dB). Meanwhile, if S12(L) is greater than S12(R), the polarization direction of the antenna under test is left-hand polarization, whereas if S12(R) is greater than S12(L), the polarization direction of the antenna under test is right-hand polarization.
Therefore, the insertion loss corresponding to each angle is obtained without the need of testing 360 degrees by the rotary table, so that the testing cost is reduced, and the testing and data processing efficiency is improved.
In order to implement the method for measuring the antenna axial ratio, the embodiment provides a data processing device. Fig. 5 is a schematic structural diagram of a data processing apparatus according to an embodiment of the present application. As shown in fig. 5, the data processing apparatus of the present embodiment includes: a processor 501 and a memory 502; memory 502 for storing computer execution instructions; a processor 501 for executing computer-executable instructions stored in the memory to implement the steps performed in the above-described embodiments. Reference may be made in particular to the description relating to the method embodiments described above.
Namely, the data processing apparatus is configured to:
a left-hand polarization antenna in the device is installed on a second preset antenna support, the direction of the left-hand polarization antenna and the direction of the antenna to be measured are arranged in opposite directions, and meanwhile, when the network analyzer is connected with the left-hand polarization antenna through the second coaxial line, the first insertion loss between the antenna to be measured and the left-hand polarization antenna is measured through the network analyzer;
the left-hand polarization antenna in the device is removed, the right-hand polarization antenna in the device is installed on the second preset antenna support, the direction of the right-hand polarization antenna and the direction of the antenna to be measured are arranged in opposite directions, and meanwhile, when the network analyzer is connected with the right-hand polarization antenna through the second coaxial line, the second insertion loss between the antenna to be measured and the right-hand polarization antenna is measured through the network analyzer;
and calculating the axial ratio of the antenna to be measured according to the first insertion loss and the second insertion loss.
In this embodiment, the data processing device receives the first insertion loss and the second insertion loss sent by the network analyzer, and calculates the axial ratio of the antenna to be measured according to the first insertion loss and the second insertion loss.
Specifically, taking the example of first installing the left-hand polarized antenna, as shown in fig. 3, the antenna to be tested is fixed on the antenna support (for example, a first predetermined antenna support), the coaxial line (for example, a first coaxial line) is used to connect the antenna to be tested and the network tester, the standard antenna with left-hand polarization (for example, the left-hand polarized antenna) is fixed on the antenna support (for example, a second predetermined antenna support), and then the coaxial line (for example, a second coaxial line) is used to connect the standard antenna with left-hand polarization and the network analyzer. The direction of the standard antenna with the left polarization is adjusted to be the position direction opposite to the direction of the antenna to be measured, so that the measurement accuracy and the data effectiveness are improved conveniently. After the directions of the antenna to be measured and the standard antenna with the left-hand polarization are confirmed, the insertion loss between the antenna to be measured and the standard antenna with the left-hand polarization, namely the first insertion loss, can be measured through a network analyzer.
Then, the original standard antenna with left-hand polarization is removed, and replaced with the standard antenna with right-hand polarization (i.e., right-hand polarization antenna), and then a coaxial line (e.g., a second coaxial line) is used to connect the standard antenna with right-hand polarization and the network analyzer. The direction of the standard antenna with right-hand polarization is adjusted to be the position direction opposite to the direction of the antenna to be measured, so that the measurement accuracy and the data effectiveness are improved conveniently. After the directions of the antenna to be measured and the standard antenna with right-hand polarization are confirmed, the insertion loss between the antenna to be measured and the standard antenna with right-hand polarization, namely the second insertion loss, can be measured through the network analyzer. Then, the data processing device receives the first insertion loss and the second insertion loss measured by the network analyzer to obtain the axial ratio of the antenna to be measured.
In this embodiment, compared with the prior art, because the insertion loss corresponding to each angle is obtained without the need of 360 degrees of the turntable test, the test cost is reduced, and the test and data processing efficiency is improved.
The device provided in this embodiment may be used to implement the technical solution of the above method embodiment, and the implementation principle and technical effect are similar, which are not described herein again.
The embodiment of the present application further provides a computer-readable storage medium, where computer-executable instructions are stored in the computer-readable storage medium, and when a processor executes the computer-executable instructions, the method for measuring an antenna axial ratio as described above is implemented.
Embodiments of the present application also provide a computer program product, which includes a computer program, and when the computer program is executed by a processor, the method for measuring the antenna axial ratio is implemented as described above.
In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described device embodiments are merely illustrative, and for example, the division of the modules is only one logical division, and other divisions may be realized in practice, for example, a plurality of modules may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or modules, and may be in an electrical, mechanical or other form. In addition, functional modules in the embodiments of the present application may be integrated into one processing unit, or each module may exist alone physically, or two or more modules are integrated into one unit. The unit formed by the modules can be realized in a hardware form, and can also be realized in a form of hardware and a software functional unit.
The integrated module implemented in the form of a software functional module may be stored in a computer-readable storage medium. The software functional module is stored in a storage medium and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device) or a processor (processor) to execute some steps of the methods according to the embodiments of the present application. It should be understood that the Processor may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with the present invention may be embodied directly in a hardware processor, or in a combination of the hardware and software modules within the processor.
The memory may comprise a high-speed RAM memory, and may further comprise a non-volatile storage NVM, such as at least one disk memory, and may also be a usb disk, a removable hard disk, a read-only memory, a magnetic or optical disk, etc. The bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended ISA (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, the buses in the figures of the present application are not limited to only one bus or one type of bus. The storage medium may be implemented by any type or combination of volatile or non-volatile memory devices, such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.
An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may reside in an Application Specific Integrated Circuits (ASIC). Of course, the processor and the storage medium may reside as discrete components in an electronic device or host device.
Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Claims (7)
1. An apparatus for measuring an antenna axial ratio, the apparatus comprising: the antenna comprises a tested antenna, a standard antenna group, a network analyzer and a plurality of coaxial wires, wherein the standard antenna group consists of a left-handed polarized antenna and a right-handed polarized antenna which have the same gain, the plurality of coaxial wires comprise a first coaxial wire and a second coaxial wire, the tested antenna is fixed on a first preset antenna bracket, the left-handed polarized antenna or the right-handed polarized antenna is installed on a second preset antenna bracket, and the direction of the left-handed polarized antenna or the right-handed polarized antenna is associated with the direction of the tested antenna;
the tested antenna is connected with the network analyzer through the first coaxial line, and the network analyzer is connected with the left-handed polarized antenna or the right-handed polarized antenna through the second coaxial line;
the network analyzer is used for measuring insertion loss between the antenna to be measured and each antenna in the standard antenna group, and the insertion loss is used for supporting calculation of an axial ratio of the antenna to be measured;
wherein the insertion loss comprises a first insertion loss and a second insertion loss; the difference between the first insertion loss and the second insertion loss is used for calculating the antenna cross polarization isolation; the antenna cross polarization isolation is used for supporting the calculation of the axial ratio of the antenna to be tested; the axial ratio of the antenna to be measured is determined through the antenna cross polarization isolation and an axial ratio calculation model;
the axial ratio calculation model is XPD =24.8-20 × lgAR, wherein XPD represents the antenna cross polarization isolation, and AR represents the axial ratio of the measured antenna;
the left-hand polarization antenna is arranged at a preset position of the second preset antenna bracket, and the direction of the left-hand polarization antenna is opposite to that of the antenna to be tested;
correspondingly, the network analyzer is connected with the left-hand polarization antenna through the second coaxial line and is used for measuring a first insertion loss between the antenna to be measured and the left-hand polarization antenna;
the left-hand polarization antenna installed at the preset position is removed, the right-hand polarization antenna is installed at the preset position, and the direction of the right-hand polarization antenna is opposite to that of the antenna to be measured;
correspondingly, the network analyzer is connected with the right-hand polarization antenna through the second coaxial line and is used for measuring a second insertion loss between the antenna to be measured and the right-hand polarization antenna.
2. The apparatus of claim 1, wherein if the first insertion loss is greater than the second insertion loss, the polarization direction of the antenna under test is left-hand polarization;
and if the first insertion loss is smaller than the second insertion loss, the polarization direction of the antenna to be tested is right-hand polarization.
3. A method for measuring an antenna axial ratio, which is applied to the device according to any one of claims 1 or 2, the method comprising:
a left-hand polarization antenna in the device is installed on a second preset antenna support, the direction of the left-hand polarization antenna and the direction of the antenna to be measured are arranged in opposite directions, and meanwhile, when the network analyzer is connected with the left-hand polarization antenna through the second coaxial line, the first insertion loss between the antenna to be measured and the left-hand polarization antenna is measured through the network analyzer;
the left-hand polarization antenna in the device is removed, the right-hand polarization antenna in the device is installed on the second preset antenna support, the direction of the right-hand polarization antenna and the direction of the antenna to be measured are arranged in opposite directions, and meanwhile, when the network analyzer is connected with the right-hand polarization antenna through the second coaxial line, the second insertion loss between the antenna to be measured and the right-hand polarization antenna is measured through the network analyzer;
calculating the axial ratio of the antenna to be measured according to the first insertion loss and the second insertion loss;
wherein calculating the axial ratio of the antenna under test according to the first insertion loss and the second insertion loss comprises:
calculating a difference value between the first insertion loss and the second insertion loss according to the first insertion loss and the second insertion loss to obtain antenna cross polarization isolation;
calculating to obtain the axial ratio of the antenna to be measured through an axial ratio calculation model according to the antenna cross polarization isolation;
and the axial ratio calculation model is XPD =24.8-20 × lgAR, wherein XPD represents the antenna cross polarization isolation, and AR represents the axial ratio of the measured antenna.
4. The method of claim 3, further comprising:
and determining the polarization direction of the antenna to be tested according to the first insertion loss and the second insertion loss.
5. The method of claim 4, wherein determining the polarization direction of the antenna under test based on the first insertion loss and the second insertion loss comprises:
if the first insertion loss is larger than the second insertion loss, determining that the polarization direction of the antenna to be tested is left-hand polarization;
and if the first insertion loss is smaller than the second insertion loss, determining that the polarization direction of the antenna to be tested is right-hand polarization.
6. A data processing apparatus, characterized by comprising: at least one processor and memory;
the memory stores computer-executable instructions;
the at least one processor executing the computer-executable instructions stored by the memory causes the at least one processor to perform the method of any one of claims 3-5.
7. A computer-readable storage medium having computer-executable instructions stored thereon which, when executed by a processor, implement the method of any one of claims 3 to 5.
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