Method for determining amplitude phase errors of direction-finding channels of space-borne array antenna

An array antenna, amplitude and phase error technology, applied in the field of determining the amplitude and phase error of the spaceborne array antenna direction finding channel, can solve the problems such as the antenna channel is not given, and achieve the effect of simple and easy to understand

Active Publication Date: 2012-04-25
XIAN INSTITUE OF SPACE RADIO TECH
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AI Technical Summary

Problems solved by technology

[0010] None of the above background technologies gives how to calibrate the number of antenna channel

Method used

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  • Method for determining amplitude phase errors of direction-finding channels of space-borne array antenna
  • Method for determining amplitude phase errors of direction-finding channels of space-borne array antenna
  • Method for determining amplitude phase errors of direction-finding channels of space-borne array antenna

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Embodiment Construction

[0044] like figure 1 As shown, the present invention includes the basic structure (N receiving feeds, N input preselectors, N receivers, N couplers, a switch matrix and M frequency converters of the general spaceborne zeroing antenna direction finding channel, like figure 1 shown in the solid line) and the added configuration of the calibration system (a calibration signal source, a calibration feed and a calibration processor, such as figure 1 shown by the dotted line) in two parts.

[0045] A method for determining the magnitude and phase error of a spaceborne array antenna direction finding channel of the present invention, the steps are as follows:

[0046] Step 1: Turn on the calibration signal source;

[0047] Step 2: Determine the lth channel in front of the switch matrix as the reference, and l can be arbitrarily selected from 1 to N channels;

[0048] Step 3: Control the conduction mode of the switch matrix, control the i-th and l-th calibration signals (i∈[1, N],...

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Abstract

The invention discloses a method for determining amplitude phase errors of direction-finding channels space-borne array antenna. The method comprises the steps of configuring a calibrating signal source, a calibrating feed source and a calibrating processor on a basic structure of each of the direction-finding channels of the array antenna according to the characteristics of number change and error segmentation of the direction-finding channels of the array antenna; sequentially changing conduction relationships among switch matrixes by means of the characteristic of the conduction relationships among the switch matrixes; obtaining responses of N paths of channels to calibrating signals under the different conduction relationships among the switch matrixes; grouping a plurality of responses in different states into an equation set; obtaining a relative amplitude and a relative phase of the N paths of channels by solving the equation set; and therefore, obtaining an amplitude phase error of each of the direction-finding channels of the array antenna. The method provided by the invention is convenient in operation and capable of precisely determining the amplitude phase errors of the direction-finding channels of the array antenna.

Description

technical field [0001] The invention relates to a calibration method of a space-borne array antenna, in particular to a method for determining the amplitude and phase error of a direction-finding channel of the space-borne array antenna, which can be widely used in space-borne array antenna systems. Background technique [0002] In general spaceborne array antennas, especially spaceborne zeroing antennas, the direction finding channel is coupled from the N communication channels of the array antenna. When performing direction finding for interference, in order to reduce the scale of the subsequent direction finding processing part and simplify the system structure, use the switch matrix to select M channels from the N channels for processing (M represents the processing dimension, 2≤M≤N), but also divide the array antenna direction-finding channel into two sections, that is, before the switch matrix N channels and M channels after the switch matrix, and then make the array a...

Claims

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Application Information

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IPC IPC(8): G01S3/14
Inventor 张宁楼大年夏猛
Owner XIAN INSTITUE OF SPACE RADIO TECH
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