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Phased array rapid calibrating method based on three-phase amplitude measuring

A calibration method and phased array technology, applied in radio wave measurement systems, instruments, etc., can solve problems that cannot meet the conditions for solving the array element amplitude and phase distribution, and achieve improved calibration timeliness, significant amplitude changes, and improved calibration accuracy Effect

Inactive Publication Date: 2019-03-12
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for the second type of method that only requires amplitude measurement, the number of amplitude tests required is relatively large, otherwise the solution conditions for the array element amplitude and phase distribution cannot be met, and the number of amplitude measurements is a key factor that directly affects the calibration time of the array

Method used

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  • Phased array rapid calibrating method based on three-phase amplitude measuring
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  • Phased array rapid calibrating method based on three-phase amplitude measuring

Examples

Experimental program
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Effect test

Embodiment 2

[0071] For an N-element phased array antenna, in order to achieve calibration, it is necessary to solve the amplitude and phase values ​​of all array elements, that is, there are N unknown quantities in the array. In order to realize the solution of N unknown quantities, N equations need to be established.

[0072] Divide the antenna front into N groups. For the i-th group, a total of M i phase changing units and N-M i phase holding units, where M i less than N-M i , which can be 1. m i The resultant radiation field of a unit is expressed as

[0073]

[0074] Among them, A i1 for M i The magnitude of the synthetic radiation field of units, Φ i1 for M i The initial phase of the synthetic radiation field of units, Δ is M i The amount of channel phase shift that the units change at the same time. In this case, the remaining N-M i The resultant radiation field of a unit is expressed as

[0075]

[0076] Among them, A i2 and Φ i2 are the synthetic radiation fi...

Embodiment 3

[0102] Embodiment 3, a phased array rapid calibration method based on three-phase amplitude measurement, including erecting the phased array antenna 1 to be tested and the horn antenna 2, the phased array antenna to be tested 1 is connected to the spectrum analyzer 6, and the standard horn antenna 2 is connected to Signal source 5, phased array antenna 1 to be tested establishes communication with horn antenna 2, is characterized in that:

[0103] ① Grouping, the phased array antenna 1 to be tested contains N antenna units, and the antenna array of the phased array antenna 1 to be tested is divided into N groups, and any group i includes M i phase changing units and N-M i a phase holding unit;

[0104] ② Record, showing the total power of the synthetic radiation field of the antenna array.

[0105] Any set of i contains M i phase changing units and N-M i phase holding units, M i The resultant radiation field of a unit is expressed as:

[0106]

[0107] Among them, A ...

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Abstract

The invention discloses a phased array rapid calibrating method based on three-phase amplitude measuring. The method includes the steps of measuring synthesized field amplitudes of a whole array underthree array face phase matching states and calculating the amplitude phase values of array elements according to the measured amplitude values. In the calibrating process, only by measuring the amplitude of the radiation field, the adverse effects caused by phase measuring errors on the calculation of the single element amplitude phase value are avoided; for the N-element array, the number of times of required amplitude measuring is 3N, and the phased array antenna calibrating timeliness is greatly improved. A plurality of single element phases are changed at the same time, the variation of the amplitude of the total radiation field is obvious, the measuring error influences are weakened, and the calibration accuracy is improved.

Description

technical field [0001] The field related to the present invention is the field of antenna measurement, and has good applicability in the measurement and calibration of phased array antennas used in satellite communications, radar detection, electronic countermeasures, etc., and is especially suitable for measuring the amplitude and phase errors of phased array antennas. Quick Calibration. Background technique [0002] After the phased array antenna is assembled, the amplitude and phase error between the array elements is an important factor restricting the electrical performance of the phased array antenna, such as reducing the gain, raising the side lobe, and causing beam pointing deviation. Therefore, before the phased array antenna is put into use, its amplitude and phase errors must be measured and calibrated. [0003] For a long time, the calibration method of phased array antenna has been a research hotspot in the field of phased array antenna measurement. The phased...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/40
CPCG01S7/4004
Inventor 齐宏业杜彪韩国栋位静云杨国栋卢炜冯昊程王颖
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP