CN103558459A - External field antenna pattern testing method - Google Patents
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Abstract
The invention discloses an external field antenna pattern testing method. A test station is looked for as an auxiliary antenna and an antenna rotation platform system are installed on a mobile maneuvering device and move around a measured antenna; a total station in an optical surveying and mapping instrument is innovatively adopted for locating the angle and the distance when the antenna moves and a test station with the corresponding deviation angle can be accurately located. By the adoption of the test station locating method where the maneuvering device, the total station in the optical surveying and mapping instrument and the antenna rotation platform system are combined, the measuring angle can be located accurately to local conditions under conditions of an external field. Meanwhile, after the measuring station is located, the total station is used for automatically tracking azimuth information and a horizontal scan frame on the antenna rotation platform system is used for moving the auxiliary antenna, so that the auxiliary antenna can be accurately located at all measuring stations within a certain measurement angle range at each measuring station, the moving frequency of the maneuvering device is lowered, errors brought by moving of the maneuvering device are reduced and the testing efficiency is improved.
Description
Technical field
The invention belongs to test and measuring technical field, more specifically say, relate to a kind of under the environmental baseline of outfield the method for testing of antenna radiation pattern.
Background technology
Along with the application of antenna in the radio systems such as radar, communication is more and more extensive, the measurement problem of antenna more and more causes people's concern.The technical indicator of antenna measurement has a lot, wherein antenna radiation pattern has characterized the ability of antenna radiated electromagnetic wave in space, the performance index and the duty that have reflected antenna, therefore, Measurement and analysis antenna radiation pattern can be analyzed the radiation characteristic of antenna, can, for antenna debugging, installation, maintenance, maintenance in use provides analysis data, judge whether the performance index of antenna meet the requirements, and whether antenna exists fault.
At present, to the test of antenna radiation pattern, be all generally to carry out in microwave dark room, and the testing cost of microwave dark room is all higher.In addition under some specific external field environment condition, in the situation that particularly antenna cannot be motor-driven after installing and fixing, if antenna removal is got off to return microwave dark room, measure, not only waste time and energy, reduce work efficiency, and can not realize the test under its actual application conditions.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, the method of testing of a kind of outfield antenna radiation pattern is provided, to realize in outfield, do not dismantle antenna element and tested antenna is inconvenient motor-driven and antenna radiation pattern is measured accurately and rapidly keep in-situ test in the situation that, 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 outfield of the present invention antenna radiation pattern, is characterized in that, comprises the following steps:
(1), equipment sets up
Auxiliary antenna is arranged in antenna rotating platform system, by motor device, move to R rice that distance tested antenna dead ahead meets outfield required distance, under tested antenna centerline, set up one of total powerstation, 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 antennas, adjust the position of auxiliary antenna by motor device, auxiliary antenna and tested center of antenna position physics are aligned, this direction is 0 degree direction of tested antenna;
(3), station is established in test
After 0 degree direction of the complete definite tested antenna in antenna location, directional diagram test angle scope and stepping are set, cook up test station;
Utilize the prism of installing directly over total powerstation and auxiliary antenna center line to carry out Real-Time Monitoring, to carry out angle and distance location, by motor device, around tested antenna, take exercises, adjust and change subtest antenna present position to test station, and align with tested antenna;
According to current angle and distance information, calculate the azimuth information that corresponding each of this test station can test point;
(4), parameter measurement
Adopt total powerstation automatically to follow the tracks of azimuth information, utilize the horizontal scanning frame in antenna rotating platform system to move each test point that auxiliary antenna covers to current test station, amplitude, the phase data of the different test points that record measures are test data;
After all test points that a test station covers have been tested, station process is established in repeated test, mobile motor device is measured to next test station, until measure all test points within the scope of directional diagram test angle;
(5), data processing:
To measuring the test data of gained, process, the test data of different test station is synthesized to 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 outfield of the present invention antenna radiation pattern, by auxiliary antenna and antenna rotating platform system being arranged on movably on motor device around the tested antenna searching test station of taking exercises, while having adopted innovatively total powerstation in optical survey instrument to move antenna, carry out angle and distance location, can accurately navigate to the test station of corresponding deviation angle.The present invention adopts the total powerstation in motor device, optical gauge, the test point localization method that antenna rotating platform system combines like this, has solved under condition of external field and how to have suited measures to local conditions, exactly the difficult problem to test angle location.Simultaneously, after assignment test website, adopt total powerstation automatically to follow the tracks of azimuth information, utilize the horizontal scanning frame in antenna rotating platform system to move auxiliary antenna, can auxiliary antenna accurately be navigated in each test station to each test point of certain test angle scope, reduce the number of times that motor device moves, reduced the error that it brings, improved testing efficiency.
The method of testing of outfield of the present invention antenna radiation pattern, under condition of external field, guarantee that tested antenna original position maintains static, by the motor device at test lead and antenna rotating platform system, seek to meet the mobile test point that test environment requires and realize the antenna radiation pattern parameter testing that the corresponding number of degrees require, exempted the dismounting of tested antenna and reinstalled, having improved surveying work efficiency.
Accompanying drawing explanation
Fig. 1 is that in the present invention, equipment sets up schematic diagram;
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 that different test station orientation changes 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 here and will be left in the basket.
During the test of outfield antenna radiation pattern, equipment sets up figure as shown in Figure 1, and idiographic flow is as follows:
Auxiliary antenna is arranged in antenna rotating platform system, by motor device, moves to R rice that distance tested antenna dead ahead meets outfield required distance.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, conventionally gets K>=2.In the present embodiment, the frequency 1000MHz of test signal, corresponding wavelength λ is 0.3m, the max line dimension D=0.7m of tested antenna aperture during test (equivalent bore), K=2, the measuring distance R that meets outfield distance condition is:
In the present embodiment, under tested antenna, set up one of total powerstation, set up a confirmation method:
First total powerstation is erected to R rice, tested antenna the place ahead, 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 angle absolute value equates and OA, OC line distance are identical, OB line be total powerstation and tested antenna over against direction.By total powerstation set up B point, auxiliary antenna sets up O point, adopts in the same way auxiliary antenna is measured, if record angular distance, equates, be now under tested antenna, otherwise adjust decorating position, until meet above-mentioned requirements.
Open total powerstation, utilize total powerstation to demarcate the height of tested antenna and auxiliary antenna two antennas, adjust the position of auxiliary antenna by motor device, auxiliary antenna and tested center of antenna position physics are aligned, this direction is 0 degree direction of tested antenna.
By special-purpose 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 is towards auxiliary antenna transmitting bore direction and parallel with bore face as shown in Fig. 3 (c).
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, utilize prism to carry out location position, utilize total powerstation to demarcate the height of two antennas, the height of adjusting auxiliary antenna by the electric lifting platform of antenna rotating platform system, makes it identical with tested antenna height, and mobile motor device carries out antenna location, observe the angular readings of total powerstation, when angle is 0 °, this direction is antenna 0 degree 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 and regulates control and move horizontally; Wherein, horizontal rotating table can be realized 360 degree rotations in surface level direction, and polarized rotation platform can be realized 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, utilize the prism of installing directly over total powerstation and auxiliary antenna center line to carry out Real-Time Monitoring, to carry out angle and distance location, by motor device, around tested antenna, take exercises, adjust and change subtest antenna present position to initial testing website (outfield antenna radiation pattern angular range end points, for example test-90 ° to 90 ° degree, initial website is-90 ° or 90 °).Utilize the prism of installing directly over total powerstation and auxiliary antenna center line to carry out Real-Time Monitoring, what according to current angle and distance information, calculate this test station position can test point, utilize the horizontal scanning frame in antenna rotating platform system to move each test point that auxiliary antenna covers to current test station, start 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, the scanning that horizontal scanning frame can carry out in the horizontal direction ± x is moved, thereby makes auxiliary antenna can depart from center ± θ degree
departing from 0 degree 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, and corresponding when distance is 10m, angle is adjustable:
Auxiliary antenna be positioned to different angles can test point time need to auxiliary antenna be pointed to and be adjusted by the horizontal rotating table of antenna rotating platform system, make aligning of itself and tested antenna.
The removable angular range of the corresponding different distance scanning support of table 1.
Table 1
Test station correspondence can test point test complete after, motor device moves to next test station, mobile stepping is twice 2 θ that horizontal scanning frame single-way moving can deviation angle, can be by the prism real-time follow-up angle deviating data of 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 is carried out data processing and data correction automatically, the most at last synthetic complete antenna radiation pattern the save data of each test station data.
Shutdown test system power supply, removes Acceptance Tests equipment, and test finishes.
In the method for testing of outfield of the present invention antenna radiation pattern in line with perfect in shape and function, test accurately, the thought that is simple and easy to use is carried out integrated to method of testing and flow process, the antenna rotating platform system in test process of realizing is controlled, testing tool is controlled and Back end data is processed and revise.Operating personnel are after tested antenna and auxiliary antenna align and located, can to measurement parameter, arrange by software, then test macro will be measured task automatically, simple to operate, easy to use, only need simple several operation steps, complexity and the workload of reduction personnel operation, increase work efficiency to greatest extent.
Although above the illustrative embodiment of the present invention is described; 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 variations appended claim limit and definite the spirit and scope of the present invention in, these variations are apparent, all utilize innovation and creation that the present invention conceives all at the row of protection.
Claims (4)
1. a method of testing for outfield antenna radiation pattern, is characterized in that, comprises the following steps:
(1), equipment sets up
Auxiliary antenna is arranged in antenna rotating platform system, by motor device, move to R rice that distance tested antenna dead ahead meets outfield required distance, under 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 antennas, by motor device, adjust the position of auxiliary antenna, auxiliary antenna and tested center of antenna position physics are aligned, this direction be 0 of tested antenna spend to;
(3), station is established in test
After 0 degree direction of the complete definite tested antenna in antenna location, directional diagram test angle scope and stepping are set, cook up test station;
Utilize the prism of installing directly over total powerstation and auxiliary antenna center line to carry out Real-Time Monitoring, to carry out angle and distance location, by motor device, around tested antenna, take exercises, adjust subtest antenna present position to test station, and adjust auxiliary antenna and tested antenna aligns;
According to current angle and distance information, calculate the azimuth information that corresponding each of this test station can test point;
(4), parameter measurement
Adopt total powerstation automatically to follow the tracks of azimuth information, utilize the horizontal scanning frame in antenna rotating platform system to move each test point that auxiliary antenna covers to current test station, amplitude, the phase data of the different test points that record measures are test data;
After all test points that a test station covers have been tested, station process is established in repeated test, mobile motor device is measured to next test station, until measure all test points within the scope of directional diagram test angle;
(5), data processing
To measuring the test data of gained, process, the test data of different test station is synthesized to 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, horizontal scanning, completing auxiliary antenna height control, horizontal polarization and vertical polarization regulates control and moves horizontally, wherein, horizontal rotating table can be realized 360 degree rotations in surface level direction, and polarized rotation platform can be realized auxiliary antenna vertical rotary.
3. method of testing according to claim 1, is characterized in that, the scanning that described horizontal scanning frame can carry out in the horizontal direction ± x is moved, thereby makes auxiliary antenna can depart from center ± θ degree, and departing from 0 degree 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, is characterized in that, in step (3), described adjustment auxiliary antenna and tested antenna align as the horizontal rotating table by antenna rotating platform system points to and to adjust auxiliary antenna, makes aligning of itself and tested antenna.
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