CN117969975A - Novel antenna detection method and novel antenna detection device - Google Patents

Abstract

The application relates to a novel antenna detection method and an antenna detection device, wherein the novel antenna detection method is applied to the antenna detection device and is used for high-precision measurement in a low-reflection darkroom. The antenna detection device comprises a source antenna and a rotary table, wherein the source antenna is used for emitting detection waves, and the rotary table comprises a first rotary table and a second rotary table, the rotation axes of which are perpendicularly intersected. The tool and the antenna to be measured are arranged on the second rotary table, the source antenna emits detection waves, and then the antenna to be measured is adjusted to a zero position. And according to the azimuth angle and the pitch angle expressing the orientation of the antenna to be measured, calculating the rotation angles of the first rotary table and the second rotary table through coordinate conversion, finally recording the relevant performance of the antenna to be measured, and drawing the antenna radiation pattern. After the antenna to be detected is adjusted to the zero position, the phase center point of the antenna to be detected is positioned at the intersection point of the rotation axes of the first rotary table and the second rotary table, so that the possibility of offset of the phase center point of the antenna to be detected is reduced in the detection process, the detection principle is more met, and the detection accuracy is improved.

Description

Novel antenna detection method and novel antenna detection device

Technical Field

The present application relates to the field of antenna technologies, and in particular, to a novel antenna detection method and an antenna detection device.

Background

In order to measure the radiation pattern of the antenna, gain and phase values in different directions and pitching directions need to be measured and depicted as a graph. The antenna to be tested can be divided into two types, one type of antenna has a polarization direction perpendicular to the radiation direction, and the vertical hemispherical coverage angle area antenna is measured, for example, a vertical polarization antenna is installed on the machine side. The other antenna is radiated and polarized on a plane, and a horizontal hemispherical coverage angle field antenna is measured, for example, a vertical polarized antenna is installed on the back (belly).

Currently, in making antenna radiation pattern measurements, it is common to use the spatial directional coordinate system: and the two-dimensional turntable combined by the azimuth rotating shaft and the pitching rotating shaft is used for measuring the antenna radiation pattern. The two-dimensional turntable can be divided into a two-dimensional turntable with an upper pitching axis combined with a lower pitching axis and a two-dimensional turntable with an upper pitching axis combined with a lower pitching axis, and the two turntable have the problems of measurement principle and mechanical structure.

The two-dimensional turntable with the pitching axis on the lower azimuth axis combination has various problems affecting the measurement precision, and the problems in the aspect of measurement principle are as follows: pitch is only pitch in the zero azimuth and pitch in any azimuth is not achieved. The problems in terms of mechanical structure are: firstly, two rotation axes of a two-dimensional turntable are intersected, in order to meet the condition that the phase center of a tested antenna is located at the intersection point of the two rotation axes of the two-dimensional turntable, the turntable is complex in mechanical structure and difficult to perform low reflection treatment, so that reflection of electromagnetic waves by the turntable is strong, wherein along with rotation of an azimuth turntable, influence of pitching rotation parts located at different positions on reflection of the electromagnetic waves is different and cannot be eliminated, and amplitude and phase uniformity of an electromagnetic field can be influenced; and secondly, in the rotation process of the pitching rotating component, the center of gravity of a rotating shaft of the pitching rotating component deviates from an axis, so that the rotation stress is uneven, the rotation precision is further affected, and the problems of deviation of the phase center of a principle tested antenna and the like are generated.

The two-dimensional turntable with the upper azimuth axis combined with the lower pitching axis has various problems affecting the measurement precision, for example, the position of the antenna mounting surface of the turntable changes along with the change of the pitching angle, and the pitching scattering of the turntable also changes along with the change of the pitching angle. If the antenna frame to be measured is high through the support, the influence of the wave absorbing material on the turntable is shielded, the pitching radius of the turntable is increased, the position of the antenna to be measured moves along with the change of the pitching angle, and the amplitude measurement precision and the phase measurement are influenced.

In view of the foregoing, it is necessary to provide a novel antenna detection method and an antenna detection device, where the novel antenna detection method performs antenna radiation pattern measurement through coordinate transformation, so as to reduce the influence of problems existing in the two-dimensional combined turntable of azimuth axis and elevation axis on measurement accuracy. The antenna detection device has good low reflection performance, and the antenna detection device is adopted to replace the two-dimensional turntable, so that the accuracy of antenna detection can be improved.

Disclosure of Invention

The application provides a novel antenna detection method and an antenna detection device, which are used for solving the problems that the phase center point of a detected antenna is deviated in the detection process, electromagnetic waves emitted by a source antenna are reflected and the like in the measurement process, so that the detection result is inaccurate in the traditional antenna detection method and device.

The embodiment of the application provides a novel antenna detection method, which is applied to an antenna measurement device and used for carrying out high-precision measurement on an antenna pattern in a low-reflection dark room, wherein the antenna detection device comprises a source antenna and a turntable, the source antenna is used for emitting detection waves, the turntable comprises a first turntable and a second turntable, the second turntable is arranged on the first turntable, the rotation axis of the first turntable and the rotation axis of the second turntable are vertically intersected, and the novel antenna detection method comprises the following steps:

Installing the tool and the antenna to be tested on the second turntable;

the source antenna emits detection waves;

Adjusting the antenna to be measured to a zero position, so that the phase center point of the antenna to be measured is positioned at the intersection point of the rotation axis of the first rotary table and the rotation axis of the second rotary table, and the antenna surface of the antenna to be measured points to the incoming wave direction of the detection wave;

According to the azimuth angle and the pitch angle expressing the orientation of the antenna to be measured, calculating the rotation angle of the first turntable and the rotation angle of the second turntable through coordinate conversion;

controlling the first turntable and the second turntable to rotate according to the calculation result;

And recording the relevant performance of the tested antenna, and drawing the antenna radiation pattern.

In one possible implementation manner, the antenna to be tested is a machine side mounted vertical polarized antenna, and when the antenna to be tested is adjusted to a zero position, the phase center point of the antenna to be tested is located at the intersection point of the first rotating axis and the second rotating axis of the rotating table, and the antenna to be tested points to the incoming wave direction of the detected wave, the novel antenna detection method includes:

and adjusting the position of the antenna to be detected so that the antenna surface of the antenna to be detected is perpendicular to the incoming wave direction of the detection wave.

In one possible implementation manner, the novel antenna detection method includes, when the first turntable and the second turntable are controlled to rotate according to the calculation result, the steps of:

And controlling the rotation of the source antenna, wherein the rotation angle of the source antenna is the same as that of the second turntable.

In one possible implementation manner, the antenna to be tested is a vertically polarized antenna installed on the back (belly), and when the antenna to be tested is adjusted to a zero position so that the phase center point of the antenna to be tested is located at the intersection point of the first rotating axis and the second rotating axis, and the antenna to be tested points to the incoming wave direction of the detected wave, the novel antenna detection method includes:

And adjusting the position of the antenna to be detected, so that the antenna surface of the antenna to be detected is parallel to the incoming wave direction of the detection wave.

The embodiment of the application also provides an antenna detection device, the antenna detection device is positioned in a darkroom, the novel antenna detection method described in any one of the above is applied to the antenna detection device, and the antenna detection device comprises:

The turntable is mounted on the base;

The base is provided with a containing groove, when the rotary table is in a first state, the rotary table is located in the containing groove, when the rotary table is in a second state, the rotary table is located in the darkroom and used for detecting antenna performance, and a rotating device is arranged in the containing groove and connected with the rotary table and used for driving the rotary table to be switched from the first state to the second state.

In one possible embodiment, the turntable includes a first turntable rotating with a height direction of the turntable as an axis and a second turntable rotating with a width direction of the turntable as an axis, and a rotation axis of the first turntable and a rotation axis of the second turntable are perpendicular to each other and intersect.

In a possible embodiment, the turntable comprises a tooling, one end of which is connected to the second turntable and the other end of which is connected to the antenna under test.

In one possible embodiment, the rotation angles of the first turntable and the second turntable are each-180 ° to +180°.

In one possible embodiment, the turntable comprises a connecting piece, and the first turntable and the second turntable are respectively positioned at two sides of the connecting piece along the height direction of the turntable and staggered along the extending direction of the connecting piece.

In one possible embodiment, the first turntable includes a first turntable and a first support member, the first support member being located at a side of the first turntable away from the connection member, and a cross-sectional area of the first support member gradually decreasing in a direction away from the first turntable.

In one possible embodiment, the second turntable includes a second turntable and a second support member between the second turntable and the connection member, the second support member having a sectional area gradually decreasing in a direction approaching the connection member.

In one possible embodiment, the turntable outer surface is provided with a triangular wedge.

In one possible embodiment, the rotating device comprises a mounting piece, a driving piece and a transmission piece, wherein the mounting piece is mounted on the bottom wall of the accommodating groove, the driving piece and the transmission piece are rotatably mounted with the mounting piece, and the driving piece and the transmission piece are arranged at intervals along the width direction of the base;

One end of the driving piece, which is far away from the mounting piece, is connected with the transmission piece, and one end of the transmission piece, which is far away from the driving piece, is connected with the turntable.

In one possible embodiment, the rotating device further includes a positioning member, one end of the positioning member is rotatably connected to the mounting member, the other end of the positioning member is connected to the turntable, and a positioning protrusion is further disposed in the accommodating groove, and when the turntable is in the second state, the positioning member abuts against the positioning protrusion.

The application relates to a novel antenna detection method and an antenna detection device, wherein the novel antenna detection method is applied to the antenna detection device and is used for high-precision measurement in a low-reflection darkroom. The antenna detection device comprises a source antenna and a rotary table, wherein the source antenna is used for emitting detection waves, and the rotary table comprises a first rotary table and a second rotary table, the rotation axes of which are perpendicularly intersected. The tool and the antenna to be measured are arranged on the second rotary table, the source antenna emits detection waves, and then the antenna to be measured is adjusted to a zero position. And according to the azimuth angle and the pitch angle expressing the orientation of the antenna to be measured, calculating the rotation angles of the first rotary table and the second rotary table through coordinate conversion, finally recording the relevant performance of the antenna to be measured, and drawing the antenna radiation pattern. After the antenna to be detected is adjusted to the zero position, the phase center point of the antenna to be detected is positioned at the intersection point of the rotation axes of the first rotary table and the second rotary table, so that the possibility of offset of the phase center point of the antenna to be detected is reduced in the detection process, the detection principle is more met, and the detection accuracy is improved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application as claimed.

Drawings

Fig. 1 is a schematic structural view of a turntable according to an embodiment of the present application;

Fig. 2 is a schematic structural diagram of an antenna detection device with a turntable in a first state according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of an antenna detection device with a turntable in a second state according to an embodiment of the present application.

Reference numerals:

1-a turntable;

11-a first turntable;

111-a first turntable;

112-a first support;

112 a-mounting cavity;

113-first drive means;

12-a second turntable;

121-a second turntable;

122-a second support;

123-a second drive;

13-a connector;

14-a baffle;

2-a base;

21-a receiving groove;

211-positioning protrusions;

3-rotating means;

31-mounting;

311-first connection;

312-a second connection;

32-a driving member;

33-a transmission member;

331-a clamp;

34-positioning piece;

4-darkroom.

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.

Detailed Description

For a better understanding of the technical solution of the present application, the following detailed description of the embodiments of the present application refers to the accompanying drawings.

It should be understood that the described embodiments are merely some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

The terminology used in the embodiments of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be understood that the term "and/or" as used herein is merely one relationship describing the association of the associated objects, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

It should be noted that, the terms "upper", "lower", "left", "right", and the like in the embodiments of the present application are described in terms of the angles shown in the drawings, and should not be construed as limiting the embodiments of the present application. In the context of this document, it will also be understood that when an element is referred to as being "on" or "under" another element, it can be directly on the other element or be indirectly on the other element through intervening elements.

As shown in fig. 1 to 3, an embodiment of the present application provides an antenna detection device, which is located in a darkroom 4, and includes a turntable 1 and a base 2, wherein the turntable 1 is mounted on the base 2. A receiving groove 21 is provided in the base 2, the receiving groove 21 communicates with the darkroom 4, a turning device 3 is provided in the receiving groove 21, the turning device 3 is connected with the turntable 1 for driving the turntable 1 to switch between the first state and the second state. When the turntable 1 is in the first state, the turntable 1 is in the accommodating groove 21, and when the turntable 1 is in the second state, the turntable 1 is positioned in the darkroom 4, and at this time, the antenna under test can be mounted on the turntable 1 to detect the performance of the antenna under test.

The antenna detection device is located in the darkroom 4, when the turntable 1 is in the second state, the turntable 1 stretches into the darkroom 4, and the antenna to be detected is installed in the turntable 1 through the tool, so that the detection process of the antenna to be detected is completed in the darkroom 4, and the influence of radiation generated by the external environment or reflection of other structures in the external environment on the antenna detection result can be reduced. When the turntable 1 is in the first state, the turntable 1 is in the accommodating groove 21, and the opening of the accommodating groove 21 can be covered by the cover plate, so that other experiments can be performed in the darkroom 4.

As shown in fig. 1, in one possible embodiment, the turntable 1 includes a first turntable 11 and a second turntable 12, the first turntable 11 rotates with the height direction of the turntable 1 as an axis, the second turntable 12 rotates with the width direction of the turntable 1, the second turntable 12 is mounted to the first turntable 11 such that the rotation axis of the first turntable 11 intersects with the rotation axis of the second turntable 12, and the second turntable 12 is rotatable with the first turntable 11 around the rotation axis of the first turntable 11.

After the antenna to be measured is mounted on the turntable 1, the position of the antenna to be measured is adjusted through the tool, so that the phase center of the antenna to be measured is located at the position where the rotation axis of the first turntable 11 is intersected with the rotation axis of the second turntable 12, when the first turntable 11 and the second turntable 12 drive the antenna to be measured to rotate, the possibility that the phase center point of the antenna to be measured is offset can be reduced, and compared with the related art, the turntable 1 provided by the application has a simple structure, the low reflection performance of the turntable 1 can be improved, and the accuracy of a detection result can be improved.

In a possible embodiment the turret 1 comprises tooling for mounting the antenna under test. One end of the tool is connected with the second rotary table 12, and the other end of the tool is connected with the antenna to be tested, so that the antenna to be tested can rotate along with the second rotary table 12.

The antenna to be measured is installed in the second rotary table 12 through the frock, and the length or the shape of frock can be adjusted, and then can adjust the position of antenna to be measured, makes the phase center of antenna to be measured be located the crossing position of the axis of rotation of first rotary table 11 and the axis of rotation of second rotary table 12, reduces the phase center point of antenna to be measured and takes place the possibility of skew in the measurement process.

In one possible embodiment, the rotation angles of the first turntable 11 and the second turntable 12 are each-180 ° to +180°.

When the antenna radiation pattern is drawn, the characteristics of different positions of a plurality of tested antennas are required to be detected, and the rotation angles of the first rotary table 11 and the second rotary table 12 are calculated by expressing the azimuth angle and the pitch angle of the orientation of the tested antennas, so that the larger the rotation angles of the first rotary table 11 and the second rotary table 12 are, the larger the detection range of the rotary table 1 is, the rotation angles of the first rotary table 11 and the second rotary table 12 are respectively-180 DEG to +180 DEG, and the detection range of the rotary table 1 is favorably improved.

In one possible embodiment, the antenna under test may be a side-mounted vertically polarized antenna with an azimuth angle of + -90 deg. and a pitch angle of + -90 deg.. The antenna to be tested can be a vertical polarized antenna installed on the back (belly), the azimuth angle of the working airspace is 0-360 degrees, and the pitch angle is-5-90 degrees. The rotation angles of the first rotary table 11 and the second rotary table 12 are-180 degrees to +180 degrees, and when the antenna to be measured is measured, the working airspace of the antenna to be measured can be covered, so that the measurement requirements of different types of antennas to be measured are met.

As shown in fig. 1, in one possible embodiment, the turntable 1 comprises a connection member 13, the connection member 13 extending in the width direction of the turntable 1 for connecting the first turntable 11 and the second turntable 12. One side of the connecting piece 13 is connected with the first turntable 11 and the other side is connected with the second turntable 12 along the height direction of the turntable 1, and the first turntable 11 and the second turntable 12 are staggered along the extending direction of the connecting piece 13.

The antenna detection device further comprises a source antenna, which is also mounted in the darkroom 4 for emitting detection waves. After the source antenna and the measured antenna are adjusted to the preset positions, the phase center points of the source antenna and the measured antenna are located at the positions where the rotation axes of the first turntable 11 and the second turntable 12 intersect, and the connecting piece 13 enables the first turntable 11 and the second turntable 12 to be staggered along the width direction of the turntable 1, so that the rotation axes of the first turntable 11 and the second turntable 12 can intersect at positions other than the second turntable 12, and the possibility that detection waves are reflected on the second turntable 12 to reduce detection accuracy can be reduced.

As shown in fig. 1, in one possible embodiment, the first turntable 11 includes a first turntable 111 and a first support 112, and one side of the first turntable 111 is connected to the connection member 13 and the other side is connected to the first support 112 in the height direction of the turntable 1. The sectional area of the first support 112 gradually decreases in a direction away from the first rotary disk 111, so that the first support 112 has an inverted cone structure.

The first supporting member 112 is located at the lower side of the first rotating disc 111, and a mounting cavity 112a is formed in the first supporting member 112, and a first driving device 113 for driving the first rotating disc 111 to rotate is mounted in the mounting cavity 112a, so that the possibility of reflection of the first driving device 113 in the detection process is reduced. The first supporting member 112 has an inverted cone structure, which can reduce the possibility of reflection of the first supporting member 112, and is beneficial to reducing the possibility of influence of reflection of the first supporting member 112 on the detection result.

As shown in fig. 1, in one possible embodiment, a baffle 14 is disposed on the side of the turntable 1 where the antenna under test is mounted along the width direction of the turntable 1, and the baffle 14 is disposed around the first support 112, so that the possibility of reflection of the first support 112 can be reduced.

As shown in fig. 1, in one possible embodiment, the second turntable 12 includes a second turntable 121 and a second support 122, and one end of the second support 122 is connected to the connection member 13 and the other end is connected to the second turntable 121 for supporting the second turntable 121. The sectional area of the second supporting member 122 gradually decreases in a direction approaching the connecting member 13, so that the second supporting member 122 has an inverted cone structure.

The second supporting member 122 extends in the height direction of the turntable 1, is capable of supporting the second turntable 121, increases the distance between the turntable and the connection member 13, facilitates the installation of the antenna under test to the second turntable 121, is installed to the second supporting member 122 by the second driving means 213 for driving the second turntable 121, and extends the rotation axis of the second turntable 121 in the width direction of the turntable 1. The second support 122 has an inverted cone structure, which can reduce the possibility of reflection of the second support 122, and is beneficial to reducing the possibility of influence of reflection of the second support 122 on the detection result.

In a possible embodiment, on the outer surface of the turntable 1, a triangular wedge should be provided, which is processed according to the low reflection simulation result of the darkroom 4. For example, the triangular wedge can be adhered to the outer surface of the second supporting member 122, the outer surface of the connecting member 13, the outer surface of the baffle plate 14, and the like, and the triangular wedge can absorb electromagnetic waves and the like on the outer surface of the turntable 1, so that the influence of the reflection of the turntable 1 on the detection result is further reduced, and the accuracy of the detection result is improved.

In a possible embodiment the antenna detection means further comprise control means for controlling the rotation of the first turntable 11 and the second turntable 12. The control device is electrically connected with the turntable 1, so that the control device can control the first turntable 11 and the second turntable 12 to rotate, and is positioned outside the darkroom 4, so that an operator can control the rotation angles of the first turntable 11 and the second turntable 12 outside the darkroom 4 through the control device, the control device is convenient for the operator to operate, and the structure in the darkroom 4 can be simplified.

As shown in fig. 2 and 3, in one possible embodiment, the rotating device 3 for switching the turntable 1 between the first state and the second state includes a mounting member 31, a driving member 32, and a transmission member 33, wherein the mounting member 31 is mounted on the bottom wall of the accommodating groove 21, at least two connection portions are provided on the mounting member 31 at intervals along the width direction of the base 2, the driving member 32 is rotatably connected with the first connection portion 311, and the transmission member 33 and the turntable 1 are rotatably connected with the second connection portion 312. The end of the driving member 32 remote from the mounting member 31 is rotatably connected to a transmission member 33, and the end of the transmission member 33 remote from the driving member 32 is connected to the turntable 1.

The driving member 32 may be a telescopic member such as a hydraulic rod, when the driving member 32 is extended, the driving member 33 is pushed to rotate, so that the driving member 33 rotates from the accommodating groove 21 to the testing cavity 22, the turntable 1 can rotate from the accommodating groove 21 to the testing cavity 22 along with the driving member 33, when the driving member 32 is shortened, the driving member 33 is driven to rotate from the testing cavity 22 to the accommodating groove 21, and the turntable 1 can also rotate from the driving member 33 to the accommodating groove 21. The transmission member 33 is provided with a clamping member 331 for detachable connection with the turntable 1, when the turntable 1 is in a first state, the transmission member 33 is connected with the turntable 1 through the clamping member 331 to push the turntable 1 to switch from the first state to a second state, after the turntable 1 is in the second state, the clamping member 331 is released to keep the turntable 1 in the second state, the transmission member 33 rotates back into the accommodating groove 21, and when the turntable 1 needs to switch from the second state to the first state, the transmission member 33 is lifted first to clamp the turntable 1, and then the turntable 1 is accommodated into the accommodating groove 21 through the transmission member 33.

As shown in fig. 2 and 3, in a possible embodiment, the rotating device 3 further comprises a positioning member 34, by means of which positioning member 34 the turntable 1 is rotatably connected to the second connection part 312. A positioning projection 211 is provided in the accommodation groove 21, and the positioning piece 34 abuts against the positioning projection 211 to determine the position of the turntable 1 when the turntable 1 is in the second state.

The positioning member 34 includes two side walls, which form an L-shaped structure, one of which is used for mounting the turntable 1 and the other of which is used for being rotatably connected with the second connection portion 312, and the inner side of the L-shaped structure can be abutted with the positioning protrusion 211 when the turntable 1 is in the second state to determine the position of the turntable 1. After the positioning piece 34 is abutted against the positioning protrusion 211, the positioning piece 34 and the positioning protrusion 211 can be locked to limit the position of the turntable 1 in the darkroom 4, so that the possibility of shaking of the turntable 1 in the detection process is reduced.

The process of switching the turntable 1 from the first state to the second state is as follows: the driving piece 32 stretches to push the transmission piece 33 and the rotary table 1 to rotate, so that the rotary table 1 protrudes out of the accommodating groove 21 and enters the test cavity 22; after rotating until the positioning piece 34 abuts against the positioning protrusion 211, the positioning piece 34 is locked with the positioning protrusion 211; then, the clamping piece 331 on the transmission piece 33 is released, so that the turntable 1 is separated from the transmission piece 33; the driving member 32 is shortened, so that the transmission member 33 reversely rotates into the accommodating groove 21; finally, the cover plate is used for blocking the opening of the accommodating groove 21.

The embodiment of the application also provides a novel antenna detection method which is applied to the antenna detection device and is used for carrying out high-precision measurement on the antenna pattern in the low-reflection darkroom 4. The antenna detection device comprises a turntable 1, wherein the turntable 1 comprises a first turntable 11 and a second turntable 12, the second turntable 12 is mounted on the first turntable 11 and can rotate along with the first turntable 11, the second turntable 12 is used for mounting a tool and an antenna to be detected, and the rotation axis of the second turntable 12 is perpendicularly intersected with the rotation axis of the first turntable 11.

The antenna detection method comprises the following steps:

s1, mounting a tool and a tested antenna on a second rotary table 12;

S2, the source antenna emits detection waves;

S3, adjusting the antenna to be measured to a zero position, so that the phase center point of the antenna to be measured is positioned at the intersection point of the rotation axis of the first rotary table 11 and the rotation axis of the second rotary table 12, and the antenna surface of the antenna to be measured points to the incoming wave direction of the detection wave;

S4, calculating the rotation angle of the first rotary table 11 and the rotation angle of the second rotary table 12 through coordinate conversion according to the azimuth angle and the pitch angle expressing the orientation of the antenna to be measured;

S5, controlling the first rotary table 11 and the second rotary table 12 to rotate according to the calculation result of S4;

S6, recording the relevant performance of the antenna to be tested, and drawing the antenna radiation pattern.

The second turntable 12 is provided with a tool, and the tool is used for installing the antenna to be measured, when the antenna to be measured is adjusted to a zero position, the phase center point of the antenna to be measured can be adjusted to be positioned at the intersection point of the rotation axis of the first turntable 11 and the rotation axis of the second turntable 12 through the tool, and then the relative position of the antenna to be measured and the source antenna is adjusted through the turntable 1, so that the antenna surface of the antenna to be measured points to the incoming wave direction. When the first turntable 11 and the second turntable 12 drive the tested antenna to rotate, the phase center point of the tested antenna is positioned at the intersection point of the rotation axis of the first turntable 11 and the rotation axis of the second turntable 12, so that the possibility of offset of the phase center point of the tested antenna is reduced, and the accuracy of detection is improved. In the detection process, the detected antenna rotates by different angles to measure the relevant performance of the detected antenna at different azimuth angles and pitch angles, and when the detected antenna is adjusted to a zero position, the antenna surface of the detected antenna faces the incoming wave direction, so that the detected antenna can be detected in a working stroke.

When parameters such as model and size of the antenna to be measured are different, the phase center point of the antenna to be measured is also different, and the position of the phase center point of the antenna to be measured can be adjusted by adjusting the tool, so that the phase center point of the antenna to be measured is adjusted to the position where the rotation axis of the first turntable 11 and the rotation axis of the second turntable 12 intersect.

In one possible embodiment, the antenna to be tested is a machine side mounted vertical polarized antenna, and when the antenna to be tested is adjusted to a zero position so that the phase center point of the antenna to be tested is located at the intersection point of the rotation axis of the first turntable 11 and the rotation axis of the second turntable 12, the antenna to be tested points to the incoming wave direction of the detected wave, and the detection method includes:

S31, adjusting the position of the antenna to be detected, so that the antenna surface of the antenna to be detected is perpendicular to the incoming wave direction of the detection wave.

The azimuth angle of the working airspace of the machine side-mounted vertical polarized antenna is +/-90 degrees, the pitch angle is +/-90 degrees, a cylindrical scanning method can be adopted, the detection device can completely cover the measurement angle domain, and data are collected under the rotation angles of the azimuth angle and the pitch angle so as to draw the radiation pattern of the antenna to be detected. In step S4, the rotation angles of the first turntable 11 and the second turntable 12 are calculated through the azimuth angle and the pitch angle, so as to detect the relevant performance of the antenna under test when different azimuth angles and pitch angles are detected. In the detection process of the antenna to be detected, the antenna to be detected needs to rotate along with the first rotary table 11 and the second rotary table 12 in the angular range, and when the antenna to be detected is adjusted to a zero position, the antenna surface of the antenna to be detected is perpendicular to the incoming wave direction, so that the antenna to be detected can be detected in the working stroke.

In one possible embodiment, when the first turntable 11 and the second turntable 12 are controlled to rotate according to the calculation result of S4, the detection method includes:

S51, controlling the rotation of the source antenna, wherein the rotation angle of the source antenna is the same as that of the second turntable.

When the antenna to be measured is a vertical polarized antenna installed on the machine side, the second turntable drives the antenna to be measured to rotate, the polarization direction of the antenna to be measured can be changed, the source antenna is required to rotate by the same angle, the polarization direction of the source antenna is identical to that of the antenna to be measured, and the possibility that the detection conditions are changed when the second turntable drives the antenna to be measured to rotate to different angles is reduced.

In one possible embodiment, the antenna to be tested is a vertically polarized antenna installed on the back (belly), and when the antenna to be tested is adjusted to a zero position so that the phase center point of the antenna to be tested is located at the intersection point of the rotation axis of the first turntable 11 and the rotation axis of the second turntable 12, the antenna to be tested points to the incoming wave direction of the detection wave, the novel antenna detection method comprises:

s32, adjusting the position of the antenna to be detected, so that the antenna surface of the antenna to be detected is parallel to the incoming wave direction of the detection wave.

Aircraft dorsum (aircraft belly) is equipped with vertical polarized antenna work airspace: the azimuth angle is 0-360 degrees, the pitch angle is-5-90 degrees, a spherical scanning method can be adopted, and data are collected under the azimuth angle and pitch angle coordinate system so as to draw the radiation pattern of the antenna to be tested. In step S4, the rotation angles of the first turntable 11 and the second turntable 12 are calculated through the azimuth angle and the pitch angle, so as to detect the relevant performance of the antenna under test when different azimuth angles and pitch angles are detected. In the detection process of the antenna to be detected, the antenna to be detected needs to rotate along with the first rotary table 11 and the second rotary table 12 in the angular range, and when the antenna to be detected is adjusted to a zero position, the antenna surface of the antenna to be detected is parallel to the incoming wave direction, so that the antenna to be detected can be detected in the working stroke.

The embodiment of the application provides a novel antenna detection method and an antenna detection device, wherein the novel antenna detection method is applied to the antenna detection device and used for high-precision detection in a low-reflection darkroom. The antenna detection device comprises a source antenna and a turntable 1, wherein the source antenna is used for emitting detection waves, and the turntable 1 comprises a first turntable 11 and a second turntable 12 with rotation axes which are perpendicularly intersected. The fixture and the antenna to be measured are mounted on the second turntable 12, the source antenna emits detection waves, and then the antenna to be measured is adjusted to a zero position. According to the azimuth angle and the pitch angle expressing the orientation of the antenna to be measured, the rotation angles of the first rotary table 11 and the second rotary table 12 are calculated through coordinate conversion, the relevant performance of the antenna to be measured is finally recorded, and the antenna radiation pattern is drawn. After the antenna to be measured is adjusted to the zero position, the phase center point of the antenna to be measured is positioned at the intersection point of the rotation axes of the first rotary table 11 and the second rotary table 12, so that the possibility of offset of the phase center point of the antenna to be measured is reduced in the detection process, the detection principle is more met, and the detection accuracy is improved.

The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (14)

1. The utility model provides a novel antenna detection method, is applied to antenna measuring device for carry out high accuracy and measure antenna pattern in low reflection dark room, antenna detecting device includes source antenna and revolving stage (1), and source antenna is used for transmitting the detection wave, revolving stage (1) include first revolving stage (11) and second revolving stage (12), second revolving stage (12) install in first revolving stage (11), and the axis of rotation of first revolving stage (11) with the axis of rotation of second revolving stage (12) is perpendicular crossing, its characterized in that, novel antenna detection method includes:

installing a tool and a tested antenna on the second rotary table (12);

the source antenna emits detection waves;

Adjusting the antenna to be measured to a zero position, so that the phase center point of the antenna to be measured is positioned at the intersection point of the rotation axis of the first rotary table (11) and the rotation axis of the second rotary table (12), and the antenna surface of the antenna to be measured points to the incoming wave direction of the detection wave;

According to the azimuth angle and the pitch angle expressing the orientation of the antenna to be measured, calculating the rotation angle of the first turntable (11) and the rotation angle of the second turntable (12) through coordinate conversion;

Controlling the rotation of the first turntable (11) and the second turntable (12) according to the calculation result;

And recording the relevant performance of the tested antenna, and drawing the antenna radiation pattern.

2. The novel antenna detection method according to claim 1, wherein the antenna to be detected is a side-mounted vertically polarized antenna, and when the antenna to be detected is adjusted to a zero position so that a phase center point of the antenna to be detected is located at an intersection point of a rotation axis of the first turntable (11) and a rotation axis of the second turntable (12), the antenna to be detected is directed in an incoming wave direction of the detection wave, the novel antenna detection method comprises:

and adjusting the position of the antenna to be detected so that the antenna surface of the antenna to be detected is perpendicular to the incoming wave direction of the detection wave.

3. The novel antenna detection method according to claim 2, characterized in that it comprises, when the rotation of the first turntable (11) and the second turntable (12) is controlled according to the calculation result, that:

And controlling the rotation of the source antenna, wherein the rotation angle of the source antenna is the same as that of the second turntable.

4. The novel antenna detection method according to claim 1, wherein the antenna to be detected is a back (belly) mounted vertical polarized antenna, and when the antenna to be detected is adjusted to a zero position so that a phase center point of the antenna to be detected is located at an intersection point of a rotation axis of the first turntable (11) and a rotation axis of the second turntable (12), the antenna to be detected is directed in an incoming wave direction of the detection wave, the novel antenna detection method comprises:

And adjusting the position of the antenna to be detected, so that the antenna surface of the antenna to be detected is parallel to the incoming wave direction of the detection wave.

5. An antenna detection device, which is located in a darkroom, to which the novel antenna detection method according to any one of claims 1 to 4 is applied, characterized in that the antenna detection device comprises:

the turntable comprises a turntable (1) and a base (2), wherein the turntable (1) is mounted on the base (2);

the base (2) is provided with a containing groove (21), when the rotary table (1) is in a first state, the rotary table (1) is located in the containing groove (21), when the rotary table (1) is in a second state, the rotary table (1) is located in the darkroom (4) and used for detecting antenna performance, a rotating device (3) is arranged in the containing groove (21), and the rotating device (3) is connected with the rotary table (1) and used for driving the rotary table (1) to be switched from the first state to the second state.

6. The antenna detection device according to claim 5, wherein the turntable (1) includes a first turntable (11) and a second turntable (12), the first turntable (11) rotates with a height direction of the turntable (1) as an axis, the second turntable (12) rotates with a width direction of the turntable (1) as an axis, and a rotation axis of the first turntable (11) and a rotation axis of the second turntable (12) are perpendicular to each other and intersect.

7. The antenna detection device according to claim 6, characterized in that the turntable (1) comprises a tooling, one end of which is connected to the second turntable (12) and the other end is connected to the antenna under test.

8. The antenna detection device according to claim 6, characterized in that the rotation angle of the first turntable (11) and the second turntable (12) is-180 ° to +180°.

9. The antenna detection device according to claim 6, wherein the turntable (1) comprises a connecting member (13), and the first turntable (11) and the second turntable (12) are respectively located on both sides of the connecting member (13) in the height direction of the turntable (1) and are staggered in the extending direction of the connecting member.

10. The antenna detection device according to claim 9, wherein the first turntable (11) comprises a first turntable (111) and a first support member (112), the first support member (112) being located at a side of the first turntable (111) remote from the connection member (13), the cross-sectional area of the first support member (112) gradually decreasing in a direction remote from the first turntable (111).

11. The antenna detection device according to claim 9, wherein the second turntable (12) comprises a second turntable (121) and a second support (122), the second support (122) being located between the second turntable (121) and the connection piece (13), the cross-sectional area of the second support (122) gradually decreasing in a direction approaching the connection piece (13).

12. The antenna detection device according to claim 5, characterized in that the outer surface of the turntable (1) is provided with a triangular wedge.

13. The antenna detection device according to claim 5, wherein the rotation device (3) includes a mounting member (31), a driving member (32) and a transmission member (33), the mounting member (31) is mounted to a bottom wall of the accommodating groove (21), the driving member (32) and the transmission member (33) are both rotatably mounted with the mounting member (31), and the driving member (32) and the transmission member (33) are disposed at intervals along a width direction of the base (2);

One end of the driving piece (32) far away from the mounting piece (31) is connected with the transmission piece (33), and one end of the transmission piece (33) far away from the driving piece (32) is connected with the turntable (1).

14. The antenna detection device according to claim 13, wherein the rotation device (3) further comprises a positioning member (34), one end of the positioning member (34) is rotatably connected to the mounting member (31), the other end is connected to the turntable (1), a positioning protrusion (211) is further provided in the accommodating groove (21), and when the turntable (1) is in the second state, the positioning member (34) abuts against the positioning protrusion (211).