CN114624521A - Method for quickly measuring phase center of antenna - Google Patents
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- CN114624521A CN114624521A CN202011438106.1A CN202011438106A CN114624521A CN 114624521 A CN114624521 A CN 114624521A CN 202011438106 A CN202011438106 A CN 202011438106A CN 114624521 A CN114624521 A CN 114624521A
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Abstract
The invention relates to a method for quickly measuring an antenna phase center, which utilizes a standard antenna to measure the phase center corresponding to an antenna to be measured in a solid angle range, and comprises the following steps: the direction from the coordinate origin of the solid angle to the geometric center point of the spherical range covered by the solid angle is
In the XZ plane, the angle of the spherical range is from the first angle to the second angle, and in the YZ plane, the angle of the spherical range is from the third angle to the fourth angle; along the direction
Adjusting the position of the antenna to be measured to enable the electric field phases in the first and second angle directions to be equal; along the direction
Adjusting the position of the antenna to be measured to enable the electric field phases in the third and fourth angular directions to be equal; and along the direction
And adjusting the position of the antenna to be measured to enable the electric field phase of the geometric center point to be equal to the fourth electric field phase, wherein the position of the coordinate origin of the solid angle is the phase center. The phase center can be determined by several comparisons, avoiding the problem of complex calculation of the traditional technology.
Description
Technical Field
The invention relates to a measurement method, in particular to a method for rapidly measuring the phase center of an antenna.
Background technology
In recent years, positioning functions are required in indoor positioning applications such as warehousing, electric power, routing inspection and object control, or outdoor positioning applications such as intelligent driving. The important point of the positioning technology is that the phase center of the positioning antenna itself must be accurately confirmed, because the development of the positioning algorithm is calculated based on considering the antenna as a point wave source, and it is assumed that the point wave source is located at the geometric center of the antenna structure, however, with the miniaturization of the mobile device, the structure of the antenna itself tends to be more complex to utilize the limited space, it is not only difficult to define the position of the geometric center of the antenna, but also the geometric center of the antenna is not necessarily the phase center of the antenna, so if an error is introduced at the source of the positioning antenna, no matter what algorithm or high-precision map is matched, the improvement of the positioning accuracy is limited, and therefore, the confirmation of the antenna phase center is crucial for the positioning application.
In addition, because the antenna itself is not a perfect point wave source, the phase center is not a fixed single point but varies with the frequency and different solid angles, therefore, if a better way to grasp the phase center variation of an antenna is to regard the whole 3D spherical surface as a combination of a plurality of solid angles, measure a phase center corresponding to each solid angle, and thus it is a complete 3D phase center database, so that a positioning algorithm development engineer can select the adopted antenna phase center coordinates according to the actual application scene, and reduce the positioning error from the source.
Chinese patent publication No. CN101320062A discloses a method for measuring the phase center of an antenna, but still has the following disadvantages
The calculation is complex, and the unknown variable cannot be directly calculated by the formula (6) or the formula (7) through the simultaneous equations, so that a least square method must be used to test a possible numerical solution, and the procedure of the CN101320062A patent specification, fig. 3, is subject to several calculations and measurement errors, and finally a more accurate phase center can be obtained.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a method for quickly measuring the phase center of an antenna.
The invention relates to a method for quickly measuring the phase center of an antenna, which measures the phase center corresponding to the antenna to be measured in a solid angle range by using a standard antenna and comprises the following steps: (A) the straight line direction from the coordinate origin of the solid angle to the geometric center point of the spherical range covered by the solid angle is defined
And is
The solid angle ranges from a first angle to a second angle in the XZ plane, and the solid angle ranges from a third angle to a fourth angle in the YZ plane; (B) measuring a first electric field phase of the antenna to be measured in a first angular direction and a second electric field phase of the antenna to be measured in a second angular direction by using a standard antenna, and determining a difference value of the first electric field phase and the second electric field phase along the direction
The antenna to be detected is translated back and forth until the size of the X-direction difference value is lower than a first preset threshold value; (C) measuring the third angle direction of the antenna to be measured by using the standard antennaA third electric field phase and a fourth electric field phase in a fourth angular direction, and a Y-direction difference between the third electric field phase and the fourth electric field phase
The antenna to be detected is translated back and forth until the Y-direction difference value is lower than a second preset threshold value; and (D) finally, measuring the fifth electric field phase of the geometric center point by using the standard antenna, and determining the Z-direction difference value of the fifth electric field phase and the fourth electric field phase along the direction
And (4) translating the antenna to be tested back and forth until the magnitude of the Z-direction difference value is lower than a third preset threshold value, wherein the position of the coordinate origin of the solid angle is the phase center of the antenna to be tested.
Preferably, the step (B) determines the front-back direction of the translation according to the positive and negative of the X-direction difference, and the magnitude of the X-direction difference determines the distance of the translation; determining the front and back directions of translation according to the positive and negative of the Y-direction difference value, and determining the translation distance according to the size of the Y-direction difference value; and step (D) determining the front and back directions of translation according to the positive and negative of the Z-direction difference, and determining the translation distance according to the size of the Z-direction difference.
In addition, step (D) of the above method may also be performed in the following manner:
(D) finally, a fifth electric field phase of the geometric center point is measured by using a standard antenna, and the direction is determined according to the Z-direction difference value of the fifth electric field phase and the third electric field phase
And (4) translating the antenna to be tested back and forth until the magnitude of the Z-direction difference value is lower than a third preset threshold value, wherein the position of the coordinate origin of the solid angle is the phase center of the antenna to be tested.
Alternatively, the step (D) may be performed as follows:
(D) finally, a fifth electric field phase of the geometric center point is measured by using the standard antenna, and the direction is determined according to three Z-direction deviation values of the fifth electric field phase, the fourth electric field phase and the third electric field phase
And translating the antenna to be tested back and forth until the magnitude of each Z-direction deviation value is lower than a third preset threshold value, wherein the position of the coordinate origin of the solid angle is the phase center of the antenna to be tested.
Preferably, the step (B) determines the front-back direction of the translation according to the positive and negative of the X-direction difference, and the magnitude of the X-direction difference determines the distance of the translation; determining the front and back directions of translation according to the positive and negative of the Y-direction difference value, and determining the translation distance according to the size of the Y-direction difference value; and step (D) determining the front-back direction of the translation according to the positive and negative of the Z-direction deviation values, and determining the distance of the translation according to the magnitude of the Z-direction deviation values.
Preferably, the antenna to be measured is placed on a two-axis turntable, and the rotating coordinate origin of the two-axis turntable is the coordinate origin corresponding to the solid angle.
Preferably, the standard antenna measures the antenna under test by a direct far field method.
Preferably, the standard antenna is arranged at the front end of the robot arm, the robot arm controls the standard antenna to move on a preset space spherical surface, and the sphere center of the space spherical surface is the coordinate origin corresponding to the solid angle.
Preferably, the standard antenna is a compact field antenna.
Preferably, the standard antenna is arranged on the L-shaped arm and faces the concave reflector, the L-shaped arm controls the concave reflector to move on a preset space spherical surface, the sphere center of the space spherical surface is the coordinate origin corresponding to the solid angle, and the antenna to be measured is placed at the sphere center.
Preferably, the first preset threshold is less than 5 degrees, the second preset threshold is less than 5 degrees, and the third preset threshold is less than 5 degrees.
The invention has the following effects:
the method does not need to adopt excessively complicated numerical calculation, and only needs to define the connecting line from the coordinate origin of the solid angle to the geometric center point of the spherical range as the linear direction
The difference in the X-direction is only affected by the direction of the phase center and the origin of coordinates
The difference in Y direction is only affected by the direction of the phase center and the origin of coordinates
The Z-direction difference (or Z-direction deviation value) is only influenced by the direction of the phase center and the coordinate origin
The above offset distance influences, so that the X-direction difference, the Y-direction difference, and the Z-direction difference (or the Z-direction offset) can be independently adjusted to approach zero, and the coordinate origin is the phase center.
Drawings
Fig. 1 is a schematic illustration of the propagation of the antenna electric field.
FIG. 2 is a schematic diagram of a plurality of vector relationships.
Fig. 3 is a schematic diagram of an antenna under test, a standard antenna, and a solid angle.
FIG. 4 is a flow chart of the first preferred embodiment of the present invention.
FIG. 5 is a schematic XZ plane diagram illustrating the propagation path and the calibration method of the first preferred embodiment.
Fig. 6 is a YZ plane schematic diagram illustrating the propagation path and the correction method of the first preferred embodiment.
FIG. 7 is a flowchart illustrating a second preferred embodiment of the present invention.
FIG. 8 is a flowchart illustrating a third preferred embodiment of the present invention.
FIG. 9 is a flowchart illustrating a fourth preferred embodiment of the present invention.
FIG. 10 is a diagram of a standard antenna measuring an antenna under test by direct far field method.
FIG. 11 is a diagram of a standard antenna mounted on a robot for measuring an antenna under test.
FIG. 12 is a schematic diagram of a standard antenna measuring an antenna under test by a compact field method.
Detailed Description
Referring to fig. 1, a phase center (phase center) is an origin O at which electromagnetic waves are spherically propagated outwards, phase angles on the same spherical plane are the same, phase centers of antennas at the same frequency but in different solid angle ranges do not usually fall on the same point, and when an origin of a coordinate axis of an electric field having the same phase angle on the same spherical plane corresponding to the solid angle is found out through experiments or simulations as the phase center, and is expressed as a distance parameter r in an electric field E (r, θ, Φ) by a mathematical expression, the phase of the electric field E (r, θ, Φ) is fixed no matter how the angle (θ, Φ) changes.
The far field electric field spherical coordinates of any one antenna can be expressed as the following formula (1):
Fu(theta, phi) represents an amplitude function,
representing a phase function, k being
Referring to fig. 2, if the antenna has its phase center O 'deviated from the measurement center O when performing the phase center measurement, the far field equation (1) with O' as a reference point must be modified to the following equation (2):
order to
And will be
Respectively converted from spherical coordinates to rectangular coordinates and then represented again as
The following were used:
psi (θ, φ) of equation (5) is a phase function with O' as a reference point, and
i.e. the phase function when O' and O are at the same point, and it can be known from equation (5) that the phase function ψ (θ, Φ) of the antenna electric field is related only to the phase center shift in the measurement plane.
For example, when phi is equal to 0 deg.,
therefore ψ θ, φ 0 ° is independent of Δ y.
When phi is equal to 90 degrees,
therefore ψ (θ, Φ ═ 0 °) is independent of Δ x.
Referring to fig. 3 and 4, the first preferred embodiment of the method for quickly measuring the phase center of an antenna according to the present invention measures the phase center 21 corresponding to the antenna 2 to be measured in the solid angle Ω range by using the standard antenna 1, and includes the following steps (a) to (D):
a step (A): defining the origin of coordinates O' of solid angle omega to the geometric centre e of a spherical area S covered by solid angle omegaIn the linear direction of
And is
The solid angle Ω ranges in the XZ plane from a first angle at point a to a second angle at point b, and the solid angle Ω ranges in the YZ plane from a third angle at point c to a fourth angle at point d;
step (B): measuring a first electric field phase at a first angular direction point a and a second electric field phase at a second angular direction point b of an antenna 2 to be measured by using a standard antenna 1, and determining a direction according to an X-direction difference between the first electric field phase and the second electric field phase
The antenna to be detected 2 is translated back and forth until the difference value in the X direction is lower than a first preset threshold value; more specifically, in this step, the front-back direction of the translation is determined based on the positive or negative X-direction difference, and the distance of the translation is determined based on the magnitude of the X-direction difference. The first predetermined threshold is less than 5 degrees, preferably 0 degrees.
Referring to fig. 5, it can be understood from the figure that if the phase center 21 is not located in the linear direction
In the above, the path from the phase center 21 to the point a is not equal to the path from the phase center 21 to the point B, and therefore, the step (B) must move the antenna 2 to be measured (see fig. 3) in the direction
The front-back translation is carried out until the phase of the first electric field at the point a is equal to the phase of the second electric field at the point b, which represents that the phase center 21 of the antenna 2 to be measured is positioned in the linear direction at the moment
And Δ x is corrected accordingly. Fig. 5 also illustrates paths Pa and a between the phase center 21 and the point a as Δ x increasesThe greater the difference between the two paths Pb from the phase center 21 to the point b, the greater the corresponding X-direction difference between the first electric field phase and the second electric field phase; furthermore, the phase center 21 is located at the origin of coordinates O' to
Or right half plane in between, or located at the origin of coordinates O' to
Such a difference between the left half-planes will also reflect the positive and negative of the difference in the X-direction, e.g. the phase center 21 is located at the origin of coordinates O' to
The path Pa is longer than the path Pb in the right half-plane, and the difference between the first electric field phase and the second electric field phase is positive, so that it is known that the antenna 2 to be measured should be oriented toward the X direction
The larger the X-direction difference, the more unit distance per movement, and according to this rule, the more quickly the phase center 21 is moved to the YZ plane, and as long as the phase center 21 is on the YZ plane, the path Pa is necessarily equal to the path Pb regardless of whether Δ y (see fig. 6) or Δ z is any value, and thus Δ X can be corrected by the X-direction difference independently. Similarly, Δ y and Δ z can be corrected.
Step (C): then, the standard antenna 1 is used to measure a third electric field phase of the antenna 2 to be measured in a third angular direction and a fourth electric field phase in a fourth angular direction, and the third electric field phase and the fourth electric field phase are different in Y direction along the direction
The antenna 2 to be detected is translated back and forth until the Y-direction difference value is lower than a second preset threshold value; more specifically, in this step, the forward/backward direction of the translation is determined based on the positive/negative Y-direction difference, and the distance of the translation is determined based on the magnitude of the Y-direction difference. The second predetermined threshold is less than 5 degrees, preferably0 degree.
Referring to fig. 6, it can be understood from the figure that if the phase center 21 is not located in the linear direction
In the above, the path Pc from the phase center 21 to the point C is not equal to the path Pd from the phase center 21 to the point d, and therefore, the step (C) must make the antenna 2 to be measured (see fig. 3) along the direction
The front and back translation is carried out until the third electric field phase at the point c is equal to the fourth electric field phase at the point d, which represents that the phase center 21 of the antenna 2 to be measured is positioned in the linear direction at the moment
In the above, Δ y is corrected out. It can be also described from fig. 6 that if Δ Y is larger, the difference between the path Pc from the phase center 21 to the point c and the path Pd from the phase center 21 to the point d is larger, and the corresponding Y-direction difference value obtained by subtracting the third electric field phase and the fourth electric field phase is larger; furthermore, the phase center 21 is located at the origin of coordinates O' to
Or right half plane in between, or located at the origin of coordinates O' to
Such a difference between the left half-planes will also reflect the positive and negative of the difference in the Y-direction, e.g. the phase center 21 is located at the origin of coordinates O' to
The right half plane therebetween, the path Pc is longer than the path Pd, the phase of the third electric field minus the phase of the fourth electric field is positive, and the difference in the Y direction is positive, it is known that the antenna 2 to be measured should be oriented toward
Direction shift, and each shift with larger difference value in Y directionThe more unit distances are required, the more rapidly the phase center 21 can be moved to the XZ plane according to the rule, and as long as the phase center 21 is on the XZ plane, the path Pc is always equal to the path Pd regardless of the value of Δ x (see fig. 5) or Δ z, so that the Y-direction difference can be independently used to correct Δ Y.
The order of step (B) and step (C) may be reversed.
Referring back to fig. 3, 4 and 6, step (D): measuring a fifth electric field phase of the antenna 2 at the geometric center point e by using the standard antenna 1, and determining a Z-direction difference between the fifth electric field phase and the third electric field phase along the direction
And (3) translating the antenna to be tested 2 back and forth until the magnitude of the difference value in the Z direction is lower than a third preset threshold value, wherein the position of the coordinate origin O' corresponding to the solid angle omega is the phase center 21 of the antenna to be tested 2. More specifically, in this step, the forward/backward direction of the translation is determined based on the positive/negative Z-direction difference, and the distance of the translation is determined based on the magnitude of the Z-direction difference. The third predetermined threshold is less than 5 degrees, preferably 0 degrees.
Referring to fig. 7, a third preferred embodiment of the present invention is similar to the first preferred embodiment, except that: the third preferred embodiment is performed according to the sequence of steps (a), (B), (D) and (C), and the Z-direction difference in step (D) is obtained by subtracting the fifth electric field phase from the first electric field phase, or by subtracting the fifth electric field phase from the second electric field phase.
Referring to fig. 8, a fourth preferred embodiment of the present invention is similar to the first preferred embodiment, and the difference is: the steps are sequentially performed as steps (a), (C), (D) and (B), and the Z-direction difference in step (D) is obtained by subtracting the fifth electric field phase from the third electric field phase, or by subtracting the fifth electric field phase from the fourth electric field phase.
Referring to fig. 9, a fifth preferred embodiment of the present invention is similar to the first preferred embodiment, except that step (D') is substituted for step (D) of the first preferred embodiment. Step (D'): measuring the geometry of an antenna 2 to be measured by using a standard antenna 1A fifth electric field phase at the center point e, and a direction along the direction according to three Z-directional deviation values of the fifth electric field phase, the fourth electric field phase and the third electric field phase
And translating the antenna to be tested 2 back and forth until the magnitude of each Z-direction deviation value is lower than a third preset threshold value, wherein the position of the coordinate origin O' corresponding to the solid angle omega is the phase center 21 of the antenna to be tested 2.
Referring to fig. 10, the standard antenna 1 measures the antenna 2 to be measured by a direct far field method, and the antenna 2 to be measured is placed on the two-axis turntable 3.
Referring to fig. 11, the standard antenna 1 is disposed at the front end of the robot arm 4, the robot arm 4 controls the standard antenna 1 to move on a preset space sphere, and a sphere center (not shown) of the space sphere is a coordinate origin O' corresponding to the solid angle Ω.
Referring to fig. 12, the standard antenna 1 is a compact field method for measuring the antenna 2 to be measured. The standard antenna 1 is arranged on the L-shaped arm 5 and faces the concave reflector 11, the L-shaped arm 5 controls the concave reflector 11 to move on a preset space spherical surface, and the sphere center (not shown) of the space spherical surface is the coordinate origin O' corresponding to the solid angle Ω, and the antenna 2 to be measured is placed at the sphere center.
The beneficial effects of the invention are as follows:
relatively, the complex numerical operation is not needed, and only the connecting line from the coordinate origin O' of the solid angle omega to the geometric center point e is defined as the linear direction
The X-direction difference is only oriented by the phase center 21 and the origin of coordinates O
The difference in Y direction is only affected by the direction of the phase center 21 and the origin of coordinates O
Influence of the deviation distance in (or each) Z-direction differenceA Z-direction offset value) is only oriented by the phase center 21 and the origin O' of coordinates
The X-direction difference, the Y-direction difference, and the Z-direction difference (or each Z-direction offset) can be independently adjusted to approach zero, and the origin O' of coordinates is the phase center 21.
The above description is only an example of the present invention, and is not intended to limit the scope of the present invention.
Reference numerals
O origin, measurement center
Center of O' phase
1 standard antenna
11 concave reflector
2 antenna to be tested
21 phase center
3 double-shaft turntable
4 mechanical arm
5L-shaped arm
Omega solid angle
Sphere range of S
a. Points b, c and d
e geometric center point
Pa, Pb, Pc, Pd path
Origin of O' coordinate
Claims (10)
1. A fast measurement method for antenna phase center utilizes a standard antenna to measure a phase center corresponding to an antenna to be measured in a solid angle range, and includes the following steps:
(A) a linear direction defining a coordinate origin of the solid angle to a geometric center point of a spherical range covered by the solid angle is
And is
The angle change of the spherical range in the XZ plane is from a first angle to a second angle, and the angle change of the spherical range in the YZ plane is from a third angle to a fourth angle;
(B) measuring a first electric field phase of the antenna to be measured in the first angular direction and a second electric field phase of the antenna to be measured in the second angular direction by using the standard antenna, and measuring the first electric field phase and the second electric field phase along the direction according to an X-direction difference value of the first electric field phase and the second electric field phase
Translating the antenna to be tested back and forth until the size of the X-direction difference value is lower than a first preset threshold value;
(C) measuring a third electric field phase of the antenna to be tested in the third angular direction and a fourth electric field phase in the fourth angular direction by using the standard antenna, and measuring the third electric field phase and the fourth electric field phase along the direction according to a Y-direction difference value of the third electric field phase and the fourth electric field phase
Translating the antenna to be tested back and forth until the Y-direction difference value is lower than a second preset threshold value; and
(D) measuring a fifth electric field phase of the antenna to be measured at the geometric center point by using the standard antenna, and determining a Z-direction difference between the fifth electric field phase and the fourth electric field phase along the direction
And translating the antenna to be tested back and forth until the magnitude of the Z-direction difference value is lower than a third preset threshold value, wherein the position of the coordinate origin of the solid angle is the phase center of the antenna to be tested.
2. The method of claim 1, wherein step (B) determines the forward and backward directions of the translation according to the positive and negative values of the X-direction difference, and the magnitude of the X-direction difference determines the distance of the translation; determining the front and back directions of translation according to the positive and negative of the Y-direction difference value, and determining the translation distance according to the size of the Y-direction difference value; and step (D) determining the front and back directions of translation according to the positive and negative of the Z-direction difference, and determining the distance of translation according to the size of the Z-direction difference.
3. The method as claimed in claim 1, wherein the antenna under test is placed on a dual-axis turntable, and an origin of rotation coordinate of the dual-axis turntable is the origin of coordinate corresponding to the solid angle.
4. The method of claim 3, wherein the standard antenna measures the antenna under test by direct far field method.
5. The method of claim 4, wherein the standard antenna is disposed at a front end of a robot arm, the robot arm controls the standard antenna to move on a predetermined spatial sphere, and a center of the spatial sphere is the origin of coordinates corresponding to the solid angle.
6. The method of claim 3, wherein the standard antenna is a compact antenna for measuring the antenna under test.
7. The method as claimed in claim 6, wherein the standard antenna is disposed on an L-shaped arm facing a concave reflector, the L-shaped arm controls the concave reflector to move on a predetermined spatial sphere, a spherical center of the spatial sphere is the origin of coordinates corresponding to the solid angle, and the antenna to be tested is disposed at the spherical center.
8. The method of claim 1, wherein the first predetermined threshold is less than 5 degrees, the second predetermined threshold is less than 5 degrees, and the third predetermined threshold is less than 5 degrees.
9. A fast measurement method for antenna phase center utilizes a standard antenna to measure a phase center corresponding to an antenna to be measured in a solid angle range, and includes the following steps:
(A) a linear direction defining a coordinate origin of the solid angle to a geometric center point of a spherical range covered by the solid angle is
And is
The angle change of the spherical surface range in the XZ plane is from a first angle to a second angle, and the angle change of the spherical surface range in the YZ plane is from a third angle to a fourth angle;
(B) measuring a first electric field phase of the antenna to be measured in the first angular direction and a second electric field phase of the antenna to be measured in the second angular direction by using the standard antenna, and measuring the first electric field phase and the second electric field phase along the direction according to an X-direction difference value of the first electric field phase and the second electric field phase
The antenna to be detected is translated back and forth until the size of the X-direction difference value is lower than a first preset threshold value;
(C) measuring a third electric field phase of the antenna to be tested in the third angular direction and a fourth electric field phase in the fourth angular direction by using the standard antenna, and measuring the third electric field phase and the fourth electric field phase along the direction according to a Y-direction difference value of the third electric field phase and the fourth electric field phase
Translating the antenna to be tested back and forth until the Y-direction difference value is lower than a second preset threshold value; and
(D) measuring a fifth electric field phase of the antenna to be measured at the geometric center point by using the standard antenna, and determining a Z-direction difference between the fifth electric field phase and the third electric field phase along the direction
And translating the antenna to be tested back and forth until the magnitude of the Z-direction difference value is lower than a third preset threshold value, wherein the position of the coordinate origin of the solid angle is the phase center of the antenna to be tested.
10. A fast measurement method for antenna phase center utilizes a standard antenna to measure a phase center corresponding to an antenna to be measured in a solid angle range, and includes the following steps:
(A) a linear direction defining a coordinate origin of the solid angle to a geometric center point of a spherical range covered by the solid angle is
And is
The angle change of the spherical surface range in the XZ plane is from a first angle to a second angle, and the angle change of the spherical surface range in the YZ plane is from a third angle to a fourth angle;
(B) measuring a first electric field phase of the antenna to be measured in the first angular direction and a second electric field phase of the antenna to be measured in the second angular direction by using the standard antenna, and measuring the first electric field phase and the second electric field phase along the direction according to an X-direction difference value of the first electric field phase and the second electric field phase
Translating the antenna to be tested back and forth until the size of the X-direction difference value is lower than a first preset threshold value;
(C) measuring a third electric field phase of the antenna to be tested in the third angular direction and a fourth electric field phase in the fourth angular direction by using the standard antenna, and measuring the third electric field phase and the fourth electric field phase along the direction according to a Y-direction difference value of the third electric field phase and the fourth electric field phase
Translating the antenna to be tested back and forth until the Y-direction difference value is lower than a second preset threshold value; and
(D) measuring a fifth electric field phase of the antenna to be measured at the geometric center point by using the standard antenna, and determining three Z-directional deviation values of the fifth electric field phase, the fourth electric field phase and the third electric field phase along the direction
And translating the antenna to be tested back and forth until the magnitude of each Z-direction deviation value is lower than a third preset threshold value, wherein the position of the coordinate origin of the solid angle is the phase center of the antenna to be tested.
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| CN202011438106.1A CN114624521A (en) | 2020-12-10 | 2020-12-10 | Method for quickly measuring phase center of antenna |
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| CN202011438106.1A CN114624521A (en) | 2020-12-10 | 2020-12-10 | Method for quickly measuring phase center of antenna |
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