CN103558459B - A kind of method of testing of external field antenna pattern - Google Patents
A kind of method of testing of external field antenna pattern Download PDFInfo
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- CN103558459B CN103558459B CN201310555059.2A CN201310555059A CN103558459B CN 103558459 B CN103558459 B CN 103558459B CN 201310555059 A CN201310555059 A CN 201310555059A CN 103558459 B CN103558459 B CN 103558459B
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Abstract
The invention discloses a kind of method of testing of external field antenna pattern, to take exercises searching test station around tested antenna by auxiliary antenna and antenna rotating platform system being arranged on moveable motor device, carry out angle and distance location when the total powerstation that have employed innovatively in optical survey instrument moves antenna, accurately can navigate to the test station of corresponding deviation angle.The test point localization method that such the present invention adopts the total powerstation in motor device, optical gauge, antenna rotating platform system combines, solves and how to suit measures to local conditions under condition of external field, exactly to a difficult problem for test angle location.Simultaneously, after assignment test website, total powerstation is adopted automatically to follow the tracks of azimuth information, the horizontal scanning frame in antenna rotating platform system is utilized to move auxiliary antenna, in each test station, auxiliary antenna accurately can be navigated to each test point of certain test angle scope, decrease the number of times of motor device movement, reduce the error that it brings, improve testing efficiency.
Description
Technical field
The invention belongs to test and measuring technical field, more specifically say, relate to a kind of method of testing of antenna radiation pattern under the environmental baseline of outfield.
Background technology
Along with the application of antenna in the radio system such as radar, communication is more and more extensive, the measurement problem of antenna more and more causes the concern of people.The technical indicator of antenna measurement has a lot, wherein antenna radiation pattern characterizes the ability of antenna radiated electromagnetic wave in space, reflect performance index and the duty of antenna, therefore, Measurement and analysis antenna radiation pattern can be analyzed the radiation characteristic of antenna, analysis data can be provided for antenna debugging in use, installation, maintenance, maintenance, judge whether the performance index of antenna meet the requirements, and whether antenna exists fault.
At present, be all generally carry out in microwave dark room to the test of antenna radiation pattern, and the testing cost of microwave dark room is all higher.In addition under some specific external field environment condition, particularly astronomical cycle fix after cannot motor-driven when, if antenna removal is got off to return microwave dark room measure, not only waste time and energy, reduce work efficiency, and the test under its actual application conditions can not be realized.Therefore, how to realize the measurement of antenna radiation pattern under external field environment condition, to the development of antenna and outfield calibration all tool be of great significance.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of method of testing of external field antenna pattern is provided, to realize not dismantling antenna element and tested antenna is inconvenient motor-driven and keep measuring accurately and rapidly antenna radiation pattern when in-situ test in outfield, for flight-line service, localization of fault provide analysis data, for the regular inspection of outfield antenna.
For achieving the above object, the method for testing of external field antenna pattern of the present invention, is characterized in that, comprises the following steps:
(1), equipment erection
Auxiliary antenna is arranged in antenna rotating platform system, R rice meeting outfield required distance apart from tested antenna dead ahead is moved to by motor device, immediately below tested antenna centerline, set up total powerstation one, prism is arranged on directly over auxiliary antenna center line;
(2), antenna location
Open total powerstation, utilize total powerstation to demarcate the height of tested antenna and auxiliary antenna two antenna, by the position of motor device adjustment auxiliary antenna, auxiliary antenna and tested center of antenna position physics are aligned, and this direction is 0 degree of direction of tested antenna;
(3), station is established in test
Antenna location complete determine 0 degree of direction of tested antenna after, setting direction figure test angle scope and stepping, cook up test station;
The prism installed directly over total powerstation and auxiliary antenna center line is utilized to carry out Real-Time Monitoring, to carry out angle and distance location, taken exercises around tested antenna by motor device, adjustment changes subtest antenna present position to test station, and aligns with tested antenna;
According to current angular and range information calculate this test station corresponding respectively can the azimuth information of test point;
(4), parameter measurement
Total powerstation is adopted automatically to follow the tracks of azimuth information, each test point utilizing the horizontal scanning frame in antenna rotating platform system to move auxiliary antenna to cover to current test station, the amplitude of the different test points that record measurement obtains, phase data and test data;
After all test points covered when a test station have been tested, station process has been established in repeated test, is measured by mobile motor device to next test station, until measure all test points in Pattern measurement angular range;
(5), data processing:
The test data measuring gained is processed, the test data of different test station is synthesized the complete antenna radiation pattern of corresponding number of degrees requirement by test orientation angles.
The object of the present invention is achieved like this
The method of testing of external field antenna pattern of the present invention, to take exercises searching test station around tested antenna by auxiliary antenna and antenna rotating platform system being arranged on moveable motor device, carry out angle and distance location when the total powerstation that have employed innovatively in optical survey instrument moves antenna, accurately can navigate to the test station of corresponding deviation angle.The test point localization method that such the present invention adopts the total powerstation in motor device, optical gauge, antenna rotating platform system combines, solves and how to suit measures to local conditions under condition of external field, exactly to a difficult problem for test angle location.Simultaneously, after assignment test website, total powerstation is adopted automatically to follow the tracks of azimuth information, the horizontal scanning frame in antenna rotating platform system is utilized to move auxiliary antenna, in each test station, auxiliary antenna accurately can be navigated to each test point of certain test angle scope, decrease the number of times of motor device movement, reduce the error that it brings, improve testing efficiency.
The method of testing of external field antenna pattern of the present invention, under condition of external field, ensure that tested antenna fixation in situ is motionless, the mobile test point required by seeking to meet test environment at the motor device of test lead and antenna rotating platform system realizes the antenna radiation pattern parameter testing that the corresponding number of degrees require, eliminate the dismounting of tested antenna and reinstall, improve surveying work efficiency.
Accompanying drawing explanation
Fig. 1 is equipment erection schematic diagram in the present invention;
Fig. 2 is total powerstation frame station location schematic diagram;
Fig. 3 is prism installation site schematic diagram;
Fig. 4 is antenna rotating platform system schematic;
Fig. 5 is that scanning support moves horizontally schematic diagram;
Fig. 6 is different test station Orientation differences schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described, so that those skilled in the art understands the present invention better.Requiring particular attention is that, in the following description, when perhaps the detailed description of known function and design can desalinate main contents of the present invention, these are described in and will be left in the basket here.
During the test of external field antenna pattern, as shown in Figure 1, idiographic flow is as follows for equipment erection figure:
Auxiliary antenna is arranged in antenna rotating platform system, is moved to R rice meeting outfield required distance apart from tested antenna dead ahead by motor device.In the present embodiment, measuring distance R is according to field testing range formula R>=KD
2/ λ calculates, and wherein D is tested antenna aperture, and K is constant, usually gets K>=2.In the present embodiment, the frequency 1000MHz of test signal, corresponding wavelength λ are 0.3m, the max line dimension D=0.7m, K=2 of tested antenna aperture (equivalent bore) during test, then the measuring distance R meeting outfield distance condition is:
In the present embodiment, immediately below tested antenna, set up total powerstation one, erection point confirmation method:
First total powerstation is erected at R rice, tested antenna front, respectively by the left and right edge of the tested antenna aperture of total powerstation Laser emission alignment lens, OA, OC line as shown in Figure 2, record now total powerstation angle, range information, if OB line and OA, OC line equal with OA, OC line angle absolute value is apart from identical, then OB line be total powerstation and tested antenna just to direction.Total powerstation is set up B point, auxiliary antenna sets up O point, adopt and in the same way auxiliary antenna is measured, if it is equal to record angular distance, be now immediately below tested antenna, otherwise adjustment decorating position, until meet above-mentioned requirements.
Open total powerstation, utilize total powerstation to demarcate the height of tested antenna and auxiliary antenna two antenna, by the position of motor device adjustment auxiliary antenna, auxiliary antenna and tested center of antenna position physics are aligned, and this direction is 0 degree of direction of tested antenna.
By special mounting socket, prism is arranged on directly over auxiliary antenna center line, prism is arranged on antenna midline position as shown in Fig. 3 (a), (b), and minute surface launches bore direction and parallel with bore face as shown in Fig. 3 (c) towards auxiliary antenna.
Connect system works power supply, connect the RF cable between the communications cable between each testing apparatus and testing apparatus and tested antenna, auxiliary antenna.
Open total powerstation, prism is utilized to carry out location position, total powerstation is utilized to demarcate the height of two antennas, by the height of the electric lifting platform adjustment auxiliary antenna of antenna rotating platform system, make it identical with tested antenna height, mobile motor device carries out antenna location, observe the angular readings of total powerstation, when angle is 0 °, this direction is antenna 0 degree of direction, and tested antenna and auxiliary antenna align.
In the present embodiment, antenna rotating platform system is configured to by electric lifting platform, horizontal rotating table, polarized rotation platform, horizontal scanning, as shown in Figure 4, completes auxiliary antenna height control, horizontal polarization and vertical polarization regulable control and moves horizontally; Wherein, horizontal rotating table can realize 360 degree of rotations in surface level direction, polarized rotation platform can realize auxiliary antenna vertical rotary.
Open Measurement &control computer, in software outfield Antenna Pattern Measuring Test angular range, stepped parameter are arranged, cook up test station.
In the present embodiment, the prism installed directly over total powerstation and auxiliary antenna center line is utilized to carry out Real-Time Monitoring, to carry out angle and distance location, taken exercises around tested antenna by motor device, adjustment changes subtest antenna present position to initial testing website (external field antenna pattern angular range end points, such as test-90 ° to 90 ° degree, origin site is-90 ° or 90 °).The prism installed directly over total powerstation and auxiliary antenna center line is utilized to carry out Real-Time Monitoring, according to current angular and range information calculate this test station position can test point, the each test point utilizing the horizontal scanning frame in antenna rotating platform system to move auxiliary antenna to cover to current test station, starts test.
Can test point scope all being determined by the horizontal scanning frame mobile range in antenna rotating platform system of different test station.
As shown in Figure 5, horizontal scanning frame can carry out in the horizontal direction ± and the scanning of x moves, thus enables auxiliary antenna depart from center ± θ degree
then departing from 0 degree of direction is θ
0test point angular range corresponding to test station be [θ
0-θ, θ
0+ θ].In the present embodiment, it is adjustable that scanning support is designed to X axis 1500mm, then corresponding to distance is 10m, adjustable angle:
Auxiliary antenna be positioned to different angles can need to be pointed to auxiliary antenna by the horizontal rotating table of antenna rotating platform system to adjust during test point, make aligning of itself and tested antenna.
The removable angular range of table 1 corresponding different distance scanning support.
Table 1
Test station is corresponding can after the test of test point completes, motor device moves to next test station, mobile stepping is that horizontal scanning frame single-way moving can twice 2 θ of deviation angle, the prism real-time follow-up angle deviating data by installing directly over total powerstation and auxiliary antenna center line in moving process.
Mobile motor device, conversion test station is tested, until the data test of all pilots to be measured is complete.
After data acquisition, testing system software carries out data processing and data correction automatically, and the antenna radiation pattern that the most each test station Data Synthesis is complete also preserves data.
Shutdown test system power supply, removes Acceptance Tests equipment, and test terminates.
In line with perfect in shape and function in the method for testing of external field antenna pattern of the present invention, test accurately, the thought be simple and easy to is carried out integrated to method of testing and flow process, realizes the antenna rotating platform Systematical control in test process, testing tool control and Back end data process and correction.Operating personnel align after location completes at tested antenna and auxiliary antenna, by software, measurement parameter is arranged, then test macro will measure task automatically, simple to operate, easy to use, only need simple several operation steps, reduce complexity and the workload of human users to greatest extent, increase work efficiency.
Although be described the illustrative embodiment of the present invention above; so that those skilled in the art understand the present invention; but should be clear; the invention is not restricted to the scope of embodiment; to those skilled in the art; as long as various change to limit and in the spirit and scope of the present invention determined, these changes are apparent, and all innovation and creation utilizing the present invention to conceive are all at the row of protection in appended claim.
Claims (4)
1. a method of testing for external field antenna pattern, is characterized in that, comprises the following steps:
(1), equipment erection
Auxiliary antenna is arranged in antenna rotating platform system, R rice meeting outfield required distance apart from tested antenna dead ahead is moved to by motor device, immediately below tested antenna centerline, set up total powerstation platform, prism is arranged on directly over auxiliary antenna center line;
(2), antenna location
Open total powerstation, utilize total powerstation to demarcate the height of tested antenna and auxiliary antenna two antenna, adjust the position of auxiliary antenna by motor device, auxiliary antenna and tested center of antenna position physics are aligned, this direction be 0 degree of tested antenna to;
(3), station is established in test
Antenna location complete determine 0 degree of direction of tested antenna after, setting direction figure test angle scope and stepping, cook up test station;
The prism installed directly over total powerstation and auxiliary antenna center line is utilized to carry out Real-Time Monitoring, to carry out angle and distance location, taken exercises around tested antenna by motor device, adjustment subtest antenna present position to test station, and adjusts auxiliary antenna and tested antenna aligns;
According to current angular and range information calculate this test station corresponding respectively can the azimuth information of test point;
(4), parameter measurement
Total powerstation is adopted automatically to follow the tracks of azimuth information, each test point utilizing the horizontal scanning frame in antenna rotating platform system to move auxiliary antenna to cover to current test station, the amplitude of the different test points that record measurement obtains, phase data and test data;
After all test points covered when a test station have been tested, station process has been established in repeated test, is measured by mobile motor device to next test station, until measure all test points in Pattern measurement angular range;
(5), data processing
The test data measuring gained is processed, the test data of different test station is synthesized the complete antenna radiation pattern of corresponding number of degrees requirement by test orientation angles.
2. method of testing according to claim 1, it is characterized in that, described antenna rotating platform system is configured to by electric lifting platform, horizontal rotating table, polarized rotation platform and horizontal scanning, complete auxiliary antenna height control, horizontal polarization and vertical polarization regulable control and move horizontally, wherein, horizontal rotating table can realize 360 degree of rotations in surface level direction, polarized rotation platform can realize auxiliary antenna vertical rotary.
3. method of testing according to claim 1, is characterized in that, and described horizontal scanning frame can carry out in the horizontal direction ± and the scanning of x moves, thus enables auxiliary antenna depart from center ± θ degree, then and departing from 0 degree of direction is θ
0test point angular range corresponding to test station be:
[θ
0-θ,θ
0+θ]。
4. method of testing according to claim 2, it is characterized in that, in step (3), described adjustment auxiliary antenna and tested antenna align and adjust for the horizontal rotating table by antenna rotating platform system points to auxiliary antenna, make aligning of itself and tested antenna.
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