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Phased array antenna beam pointing error compensation method based on bilinear fitting

A phased array antenna and beam pointing technology, applied to radio wave measurement systems, instruments, etc., can solve problems such as difficult engineering applications, algorithm divergence, and large amount of calculations

Inactive Publication Date: 2016-02-03
SHANGHAI RADIO EQUIP RES INST
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Problems solved by technology

[0009] The above methods either put forward requirements on the antenna array structure, or use probabilistic methods for random phase feed. These methods are probabilistic and require random phase feed calc

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  • Phased array antenna beam pointing error compensation method based on bilinear fitting
  • Phased array antenna beam pointing error compensation method based on bilinear fitting
  • Phased array antenna beam pointing error compensation method based on bilinear fitting

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Embodiment Construction

[0050] based on the following Figure 1 ~ Figure 7d , specifically explain the preferred embodiment of the present invention.

[0051] The most effective way to compensate the antenna beam pointing error is to measure the error value of each antenna wave position, and then compensate the error value. Due to the large number of wave positions of the phased array antenna, testing and measuring the antenna pointing error at each wave position will make the test workload heavy and time is not allowed. To this end, it is necessary to combine an effective fitting calculation method to perform effective fitting calculations based on the measured data of the antenna pointing error of the phased array antenna on the finite wave position, obtain the beam pointing error on the non-test wave position, and perform compensation. Since the wave positions of the phased array antenna form a two-dimensional spatial grid, other wave positions that need to be calculated are located in the middle...

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Abstract

The invention provides a phased array antenna beam pointing error compensation method based on bilinear fitting. A bilinear fitting method which is easily realized by a wave control machine is used to divide a curved surface formed by four adjacent beam position errors in a space into two planes. In each plane, two space points are used as a straight line to calculate error slope. Beam pointing error slopes in azimuth and elevation are respectively calculated. According to the slopes, the beam pointing error of a beam position between given beam position points can be calculated. The method is used to calculate the beam pointing error of the whole two-dimensional visible area. According to the calculated beam pointing error, a phased array antenna beam compensation table is generated and is written into the wave control machine to realize phased array antenna online beam pointing error compensation. The phased array antenna beam pointing accuracy is improved. According to the bilinear interpolation fitting method, the number of the beam positions, which need to be measured, of a phased array antenna can be reduced; the measurement test time is saved; the efficiency is significantly improved; and the cost is reduced.

Description

technical field [0001] The invention relates to the technical field of phased array antennas, in particular to a method for compensating beam pointing errors of phased array antennas based on bilinear fitting. Background technique [0002] The phased array radar seeker adopts a phased array antenna system. With the help of a digital phase shifter, the beam can be shifted from one direction to another in microseconds, so as to achieve rapid scanning of the airspace and effective target detection. Track and guide the missile towards the target. Since the digital phase shifter cannot continuously adjust the phase, and the design process will introduce errors, the antenna beam cannot be accurately pointed in the desired direction, resulting in pointing deviation. The pointing error of the phased array antenna has a very important impact on the phased array radar seeker system, which directly restricts the precision strike capability of the phased array radar seeker. [0003] T...

Claims

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Application Information

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IPC IPC(8): G01S7/00
CPCG01S7/00
Inventor 唐文明牟成虎周焯李毓琦
Owner SHANGHAI RADIO EQUIP RES INST
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