CN113608036A - High-efficiency high-precision calibration method for double-reflector antenna system - Google Patents
High-efficiency high-precision calibration method for double-reflector antenna system Download PDFInfo
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- CN113608036A CN113608036A CN202110738727.XA CN202110738727A CN113608036A CN 113608036 A CN113608036 A CN 113608036A CN 202110738727 A CN202110738727 A CN 202110738727A CN 113608036 A CN113608036 A CN 113608036A
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- 230000005540 biological transmission Effects 0.000 claims abstract description 18
- 230000005684 electric field Effects 0.000 claims description 17
- 238000006073 displacement reaction Methods 0.000 claims description 14
- 238000012360 testing method Methods 0.000 claims description 12
- 238000010586 diagram Methods 0.000 claims description 7
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/005—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using remotely controlled antenna positioning or scanning
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/08—Measuring electromagnetic field characteristics
- G01R29/10—Radiation diagrams of antennas
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
Abstract
The invention provides a high-efficiency high-precision calibration method for a double-reflector antenna system, which solves the problem of how to calibrate the double-reflector antenna system at a long distance (20-50 meters) with high efficiency and high precision under the condition that an electric axis cannot be aligned. And a purely mechanical calibration mode is adopted, a central coordinate system is established at the central focus of the double-reflector antenna system, tangent plane alignment parameters are increased, the influence of the field on beam radiation is reduced, the joint debugging difficulty of a subsequent system is reduced, and the high-efficiency microwave energy transmission with the distance of 20-50 meters is realized.
Description
Technical Field
The invention relates to a calibration method of a double-reflector antenna system.
Background
The wireless energy transmission technology is used as a novel energy transmission mode, energy can be transmitted remotely in a wireless mode, no guided wave is needed, the transmission speed is the light speed, and the energy transmission can be flexibly changed by controlling the beam direction. The working process of the microwave energy conversion device is that a microwave source converts direct current energy into microwave energy, the microwave energy is sent to a free space through a reflecting surface antenna, a beam replaces a high-voltage line to realize remote energy transmission, and the microwave energy is received through the reflecting surface antenna at a user end and is converted and output. The method can be used in the application fields of solar power stations, deep space exploration and the like.
In the radio wave radiation type wireless energy transmission technology, a transmitting antenna and a receiving antenna form a system together, and the key performance index is influenced by the calibration strategy and the precision. After the distance is increased, the difficulty and the precision of calibration are greatly increased. Unlike the traditional paraboloid, the wireless energy transmission is of a near-field point focusing type, a beam pattern is not formed, and the electric axis alignment cannot be adopted to determine the calibration error. Aiming at the characteristics of a wireless energy transmission system, a corresponding calibration method is provided.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the invention provides a high-efficiency high-precision calibration method for a double-reflector antenna system, which overcomes the defects of the prior art and solves the problem of how to calibrate the double-reflector antenna system at a longer distance (20-50 meters) with high efficiency and high precision under the condition that the electric axis cannot be aligned. And a purely mechanical calibration mode is adopted, a central coordinate system is established at the central focus of the double-reflector antenna system, tangent plane alignment parameters are increased, the influence of the field on beam radiation is reduced, the joint debugging difficulty of a subsequent system is reduced, and the high-efficiency microwave energy transmission with the distance of 20-50 meters is realized.
The technical scheme adopted by the invention is as follows: a high-efficiency high-precision calibration method for a double-reflector antenna system comprises the following steps:
step 1, testing the profile accuracy and the reference hole position of a transmitting antenna and a receiving antenna by adopting a photogrammetry method;
step 2, fitting an electric field tangent plane of the double-reflector antenna system, establishing a field coordinate system, carrying out field calibration on the transmitting antenna and the receiving antenna reflector, enabling the corner deviation between the central coordinate system of the transmitting antenna reflector and the field coordinate system and the corner deviation between the central coordinate system of the receiving antenna reflector and the field coordinate system to be smaller than the set index requirement, and adjusting the transmitting antenna and the receiving antenna to initial preset positions;
the field coordinate system is defined as: the origin is positioned at the center of a connecting line of the two reflectors, the Z axis is consistent with the transmission direction of the antenna, the X axis is vertical to the ground, and the Y axis and the X, Z axis follow the right-hand rule;
the method for fitting the electric field tangent plane of the double-reflector antenna system comprises the following steps:
taking a connecting line between a calibration hole JZK1 and a calibration hole JZK5 on the transmitting antenna reflector as a tangent plane direction, and taking a plane defined by a connecting line of three points in the center of the calibration hole JZK1, the calibration hole JZK5 and the transmitting antenna reflector as a tangent plane; the calibration hole JZK1 and the calibration hole JZK5 are positioned on the transmitting antenna reflector, and the connecting line of the two points is vertical to the ground;
taking a connecting line between a calibration hole JZK1 and a calibration hole JZK5 on the receiving antenna reflector as a tangent plane direction, and taking a plane defined by a connecting line of three points in the center of the calibration hole JZK1, the calibration hole JZK5 and the receiving antenna reflector as a tangent plane; the alignment hole JZK1 and the alignment hole JZK5 are located on the receiver antenna reflector, and the connection line of the two points is vertical to the ground.
Step 3, after the initial calibration of the reflector of the transmitting antenna and the reflector of the receiving antenna reaches the accuracy required by calibration, calibrating the reflector and the feed source assembly of the transmitting antenna and the receiving antenna respectively to ensure that the preset accuracy requirement is met between the reflector of the transmitting antenna and the transmitting feed source and between the reflector of the receiving antenna and the receiving feed source;
step 4, respectively simulating an electric field tangent plane of the transmitting antenna and an electric field tangent plane of the receiving antenna, and calibrating the corner deviation between the central coordinate system of the transmitting antenna reflector and the site coordinate system and the corner deviation between the central coordinate system of the receiving antenna reflector and the site coordinate system, wherein the requirement on the calibration precision at the moment is higher than that in the step 2;
step 5, carrying out displacement calibration between the transmitting antenna electric field tangent plane and the field coordinate system and between the receiving antenna electric field tangent plane and the field coordinate system;
step 6, calibrating X displacement parameters between the double-reflector antenna system and a field coordinate system to align the focus of the double-reflector antenna system;
and 7, carrying out directional diagram test on the double-reflector antenna system, and adjusting the rotation angle deviation and the X, Y, Z direction displacement deviation of the double-reflector antenna system according to a directional diagram test result.
Compared with the prior art, the invention has the advantages that:
(1) in the invention, a virtual center coordinate system is established at the center focus of the double-reflector antenna system, so that the influence of field conditions on the calibration precision is almost eliminated.
(2) According to the invention, tangent plane alignment parameters are added, the mechanical axis calibration of the antenna pair is directly carried out, the problem of defining the electric axis by a focusing field is avoided, and the calibration efficiency is improved.
Drawings
FIG. 1 is a flow chart of the method of the present invention.
Fig. 2 is a schematic structural diagram of a dual reflector antenna system.
Fig. 3 is a schematic view of a transmitting antenna reflector alignment aperture.
Fig. 4 is a schematic view of a receiver antenna reflector alignment aperture.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
A high-efficiency high-precision calibration method for a double-reflector antenna system is characterized by comprising the following steps:
step 1, testing the profile accuracy and the reference hole position of a transmitting antenna and a receiving antenna by adopting a photogrammetry method;
step 2, fitting an electric field tangent plane of the double-reflector antenna system, establishing a field coordinate system, carrying out field calibration on the transmitting antenna and the receiving antenna reflector, enabling the corner deviation between the central coordinate system of the transmitting antenna reflector and the field coordinate system and the corner deviation between the central coordinate system of the receiving antenna reflector and the field coordinate system to be smaller than the set index requirement, and adjusting the transmitting antenna and the receiving antenna to initial preset positions;
the field coordinate system is defined as: the origin is positioned at the center of a connecting line of the two reflectors, the Z axis is consistent with the transmission direction of the antenna, the X axis is vertical to the ground, and the Y axis and the X, Z axis follow the right-hand rule;
the method for fitting the electric field tangent plane of the double-reflector antenna system comprises the following steps:
taking a connecting line between a calibration hole JZK1 and a calibration hole JZK5 on the transmitting antenna reflector as a tangent plane direction, and taking a plane defined by a connecting line of three points in the center of the calibration hole JZK1, the calibration hole JZK5 and the transmitting antenna reflector as a tangent plane; the calibration hole JZK1 and the calibration hole JZK5 are positioned on the transmitting antenna reflector, and the connecting line of the two points is vertical to the ground;
taking a connecting line between a calibration hole JZK1 and a calibration hole JZK5 on the receiving antenna reflector as a tangent plane direction, and taking a plane defined by a connecting line of three points in the center of the calibration hole JZK1, the calibration hole JZK5 and the receiving antenna reflector as a tangent plane; the alignment hole JZK1 and the alignment hole JZK5 are located on the receiver antenna reflector, and the connection line of the two points is vertical to the ground.
Step 3, after the initial calibration of the reflector of the transmitting antenna and the reflector of the receiving antenna reaches the accuracy required by calibration, calibrating the reflector and the feed source assembly of the transmitting antenna and the receiving antenna respectively to ensure that the preset accuracy requirement is met between the reflector of the transmitting antenna and the transmitting feed source and between the reflector of the receiving antenna and the receiving feed source;
step 4, respectively simulating an electric field tangent plane of the transmitting antenna and an electric field tangent plane of the receiving antenna, and calibrating the corner deviation between the central coordinate system of the transmitting antenna reflector and the site coordinate system and the corner deviation between the central coordinate system of the receiving antenna reflector and the site coordinate system, wherein the requirement on the calibration precision at the moment is higher than that in the step 2;
step 5, carrying out displacement calibration between the transmitting antenna electric field tangent plane and the field coordinate system and between the receiving antenna electric field tangent plane and the field coordinate system;
step 6, calibrating X displacement parameters between the double-reflector antenna system and a field coordinate system to align the focus of the double-reflector antenna system;
and 7, carrying out directional diagram test on the double-reflector antenna system, and adjusting the rotation angle deviation and the X, Y, Z direction displacement deviation of the double-reflector antenna system according to a directional diagram test result.
Examples
The invention is suitable for a 2 m-caliber double-reflector system, and the distance range can be expanded from 20m to 50 m.
Step one, testing the surface accuracy and the position of a reference hole of the reflector of the transmitting and receiving single antenna, wherein the molded surface of the transmitting and receiving antenna is required to reach RMS (root mean square error) less than or equal to 0.15 (the RMS is a direct comparison result, and the RMS of free fitting is required to be less than or equal to 0.1), the position deviation of the position of the reference hole relative to a theoretical value is less than 0.08mm, and the design position of the reference hole is shown in figures 3 and 4.
And step two, during the test of the transmitting and receiving single antenna, establishing a site coordinate system OXYZ (the Z axis is consistent with the transmission direction of the antenna, the origin is positioned at the center of the connecting line of the two reflectors, the X axis is vertical to the ground, the Y axis and the X, Z axis follow the right-hand rule), and enabling the antenna to be positioned at an initial preset position by calibrating a preset tangent plane reference point (the connecting line of a calibration hole JZK1 and a calibration hole JZK5 in the images 3 and 4 is the tangent plane direction) on the antenna and the site coordinate system and the calibration of the reflector center coordinate system, wherein the rotation angle deviation Rx, Ry and Rz is required to be less than or equal to 0.1 degrees.
And step three, calibrating the mutual position relation between the transmitting and receiving single reflectors and the feed source by adjusting the feed source, wherein the self corner deviations Rx, Ry and Rz of the two single reflectors are required to be less than or equal to 0.03 degrees, and the displacement deviations Dx, Dy and Dz are required to be less than or equal to 0.05 mm.
And fourthly, simulating a transmission direction tangent plane of the transmitting and receiving single antenna through a long axis connecting line (a connecting line of a calibration hole JZK1 and a calibration hole JZK5 in the graphs 3 and 4), and carrying out angle calibration, wherein the rotation angle deviations Rx, Ry and Rz are required to be less than or equal to 0.05 degrees, so that the microwave transmission direction is parallel to the ground, the influence of ground scattering on a wave beam is reduced, and the adjustability of system joint test is improved.
And step five, calibrating Y, Z-direction displacement parameters of the tangent plane by taking the central coordinate system of the reflector as a reference, and requiring that the displacement deviations Dy and Dz are less than or equal to 0.05 mm.
And sixthly, adopting the data of the transmitting and receiving single antenna calibration hole in a central coordinate system to re-calibrate the X-direction displacement of the system, wherein the displacement deviation Dx is required to be less than or equal to 0.05mm, so that the energy transmission system is aligned in focus to obtain the best calibration precision, and the spatial transmission loss between the double-antenna system is minimized.
And seventhly, finely adjusting each position parameter according to the electrical measurement parameters so as to achieve the best effect.
The present invention has not been described in detail, partly as is known to the person skilled in the art.
Claims (4)
1. A high-efficiency high-precision calibration method for a double-reflector antenna system is characterized by comprising the following steps:
step 1, testing the profile accuracy and the reference hole position of a transmitting antenna and a receiving antenna by adopting a photogrammetry method;
step 2, fitting an electric field tangent plane of the double-reflector antenna system, establishing a field coordinate system, carrying out field calibration on the transmitting antenna and the receiving antenna reflector, enabling the corner deviation between the central coordinate system of the transmitting antenna reflector and the field coordinate system and the corner deviation between the central coordinate system of the receiving antenna reflector and the field coordinate system to be smaller than the set index requirement, and adjusting the transmitting antenna and the receiving antenna to initial preset positions;
step 3, after the initial calibration of the reflector of the transmitting antenna and the reflector of the receiving antenna reaches the accuracy required by calibration, calibrating the reflector and the feed source assembly of the transmitting antenna and the receiving antenna respectively to ensure that the preset accuracy requirement is met between the reflector of the transmitting antenna and the transmitting feed source and between the reflector of the receiving antenna and the receiving feed source;
step 4, respectively simulating an electric field tangent plane of the transmitting antenna and an electric field tangent plane of the receiving antenna, and calibrating the corner deviation between a central coordinate system of the transmitting antenna reflector and a site coordinate system and calibrating the corner deviation between the central coordinate system of the receiving antenna reflector and the site coordinate system;
step 5, carrying out displacement calibration between the transmitting antenna electric field tangent plane and the field coordinate system and between the receiving antenna electric field tangent plane and the field coordinate system;
step 6, calibrating X displacement parameters between the double-reflector antenna system and a field coordinate system to align the focus of the double-reflector antenna system;
and 7, carrying out directional diagram test on the double-reflector antenna system, and adjusting the rotation angle deviation and the X, Y, Z direction displacement deviation of the double-reflector antenna system according to a directional diagram test result.
2. The method for calibrating a dual reflector antenna system with high efficiency and high accuracy as claimed in claim 1, wherein the field coordinate system is defined as: the origin is located at the center of the line connecting the two reflectors, the Z axis is consistent with the transmission direction of the antenna, the X axis is vertical to the ground, and the Y axis and the X, Z axis follow the right-hand rule.
3. The method for calibrating the double-reflector antenna system with high efficiency and high accuracy as claimed in claim 2, wherein the step 2 comprises the following steps:
taking a connecting line between a first calibration hole and a fifth calibration hole on the reflector of the transmitting antenna as a tangent plane direction, and taking a plane enclosed by connecting lines of three points in the center of the reflector of the transmitting antenna and the first calibration hole, the fifth calibration hole as a tangent plane; the first calibration hole and the fifth calibration hole are positioned on the transmitting antenna reflector, and the connecting line of the two points is vertical to the ground;
taking a connecting line between a first calibration hole and a fifth calibration hole on the receiving antenna reflector as a tangent plane direction, and taking a plane enclosed by connecting lines of three points in the centers of the first calibration hole, the fifth calibration hole and the receiving antenna reflector as a tangent plane; the first calibration hole and the fifth calibration hole are positioned on the receiving antenna reflector, and the connecting line of the two points is vertical to the ground.
4. A method for calibrating a dual reflector antenna system with high efficiency and high accuracy as claimed in claim 3, wherein the calibration accuracy requirement in step 4 is higher than the calibration accuracy requirement in step 2.
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| CN202110738727.XA CN113608036B (en) | 2021-06-30 | 2021-06-30 | Efficient high-precision calibration method for double-reflecting-surface antenna system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114744399A (en) * | 2022-06-13 | 2022-07-12 | 深圳华大北斗科技股份有限公司 | Automatic antenna debugging system and method |
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| US20040207554A1 (en) * | 2003-01-14 | 2004-10-21 | Manfred Schuster | Method for generating calibration signals for calibrating spatially remote signal branches of antenna systems |
| US20060220950A1 (en) * | 2005-04-04 | 2006-10-05 | The Boeing Company | Sparse numerical array feed for compact antenna and RCS ranges |
| CN103411528A (en) * | 2013-08-26 | 2013-11-27 | 中国科学院空间科学与应用研究中心 | Method for calculating electric field probe rotation offset through circular polarization antenna axial ratio directional diagram |
| US20150071097A1 (en) * | 2012-03-27 | 2015-03-12 | Rosenberger Hochfrequenztechnik Gmbh & Co. Kg | Vectorial network analyser |
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- 2021-06-30 CN CN202110738727.XA patent/CN113608036B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5886534A (en) * | 1995-10-27 | 1999-03-23 | The University Of Chicago | Millimeter wave sensor for on-line inspection of thin sheet dielectrics |
| US20040207554A1 (en) * | 2003-01-14 | 2004-10-21 | Manfred Schuster | Method for generating calibration signals for calibrating spatially remote signal branches of antenna systems |
| US20060220950A1 (en) * | 2005-04-04 | 2006-10-05 | The Boeing Company | Sparse numerical array feed for compact antenna and RCS ranges |
| US20150071097A1 (en) * | 2012-03-27 | 2015-03-12 | Rosenberger Hochfrequenztechnik Gmbh & Co. Kg | Vectorial network analyser |
| CN103411528A (en) * | 2013-08-26 | 2013-11-27 | 中国科学院空间科学与应用研究中心 | Method for calculating electric field probe rotation offset through circular polarization antenna axial ratio directional diagram |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114744399A (en) * | 2022-06-13 | 2022-07-12 | 深圳华大北斗科技股份有限公司 | Automatic antenna debugging system and method |
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