Calibration method for amplitude and phase variable array antenna

An array antenna and phase technology, which is applied in the field of aerospace measurement and control, can solve problems such as long time consumption and complex data processing process, and achieve the effect of simple operation process and simple solution.

Active Publication Date: 2009-07-15
中国航天科技集团公司第五研究院第五〇四研究所
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  • Abstract
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Problems solved by technology

However, the data processing process of th

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  • Calibration method for amplitude and phase variable array antenna
  • Calibration method for amplitude and phase variable array antenna
  • Calibration method for amplitude and phase variable array antenna

Examples

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[0033] Such as figure 1 Shown is a structural diagram of an array antenna with variable amplitude and phase. In the figure, 3 is the antenna unit, 1 is the attenuator, and 2 is the phase shifter. By changing the state of the attenuator and the phase shifter, the amplitude and phase of the signal fed to each antenna unit can be changed. This work is controlled by the controller 5 To be done.

[0034] 4 is the power source. When the array antenna is in the transmitting mode, the power source feeds each antenna unit through the corresponding attenuator and phase shifter to transmit the array signal. The power source includes a power divider to divide a signal into multiple paths and feed it to each antenna unit. By setting the phase and amplitude of the signal of each antenna unit by the controller, a beam of the required specific shape can be formed and beam scanning can be realized. At this time, the auxiliary antenna 7 can be set in the far field range of the array antenna. When ...

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Abstract

The invention discloses a calibration method of an array antenna with alterable amplitude and phase. A power response of the array antenna at an auxiliary antenna is obtained by altering the states of an alterable digital phase shifter and an alterable digital attenuator in each channel of the array, an equation is formed by the power response corresponding to a response of a specific channel at multiple different states, a relative amplitude and a relative phase to a reference signal of the channel is obtained by solving the equation, and an phase-amplitude consistency error of each channel of the array is obtained, then the calibration is realized. Aiming at each channel, the calibration method of the invention can obtain the relative amplitude and phase of the channel only through three amplitude states and one phase state, the needed state parameter is small, the algorithm is simple and the operation process is easy.

Description

technical field [0001] The invention belongs to the field of aerospace measurement and control, and relates to a method for calibrating an array antenna with variable amplitude and phase. Background technique [0002] The array antenna is composed of many antenna units. Each antenna unit is fed with a signal of a certain amplitude and phase to form a specific beam and realize beam scanning. The signals of each antenna unit are superimposed to form the signal of the array antenna. For the array antenna with variable amplitude and phase, the signal amplitude and phase of each antenna unit can be adjusted. In general, the amplitude of the antenna unit signal is adjusted by controlling the attenuator connected behind each unit to form the required The phase of the antenna unit signal is controlled by changing the phase of the phase shifter connected to each unit to realize beam scanning. [0003] In order to precisely control the beam pointing, it is necessary to determine the ...

Claims

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Application Information

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IPC IPC(8): H01Q3/28H01Q3/30G06F17/16G01R29/08
Inventor 田步宁敬红勇
Owner 中国航天科技集团公司第五研究院第五〇四研究所
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