Near-field calibration method for relative amplitude and phase characteristics of spherical surface array antenna channels

A technology of array antenna and phased array antenna, which is applied to antenna radiation patterns, radio wave measurement systems, instruments, etc., can solve problems such as beam accuracy, quantization error, calibration error affecting different scanning angles, and improve engineering practicability. , to ensure the effect of positional stability

Active Publication Date: 2018-06-01
10TH RES INST OF CETC
View PDF7 Cites 31 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the radiation characteristics of the unit antenna in the active space are not equal gain, there are also quantization errors and calib

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Near-field calibration method for relative amplitude and phase characteristics of spherical surface array antenna channels
  • Near-field calibration method for relative amplitude and phase characteristics of spherical surface array antenna channels
  • Near-field calibration method for relative amplitude and phase characteristics of spherical surface array antenna channels

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] refer to figure 1 . According to the present invention, a calibration frame distributed around the spherical antenna array and a calibration frame installed in the center of the phased array antenna are erected on the periphery of the phased array antenna, and each calibration frame is distributed 1 to 10 meters away from the spherical antenna array. There are 4-6 beacon antennas in the range of 4 to 6 meters, forming a conformal spherical array distribution model with approximately uniform distribution of antenna elements; the beacon antenna is near-field coupling to the equivalent aperture of the spherical array, and each array element on the spherical array antenna is Satisfy the far-field distance condition; according to the position where the calibration antenna is installed, create a spherical array antenna coordinate system, use optical equipment to measure the coordinate position of each calibration antenna relative to the center point of the spherical array ant...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides a near-field calibration method for relative amplitude and phase characteristics of spherical surface array antenna channels, and aims to provide a method with few calibration source and capable of automatically performing self-correction on the relative amplitude and phase characteristics. The near-field calibration method is characterized in that: calibration frames distributed around a spherical surface antenna array plane are set up on the periphery of a phased-array antenna and a calibration frame is set up at the center of the phased-array antenna, thus a conformalspherical surface array distribution model for antenna unit approximate uniform distribution is formed; optical equipment is used for performing high-precision measurement on a coordinate position ofeach calibration antenna relative to a central point of the spherical surface array antenna, and a spatial distance and an axial included angle between each array element on the spherical surface array antenna and each calibration antenna are calculated; and a calibration reference signal generated by calibration test equipment is used for calibrating uplink/downlink channels of the spherical surface array antenna, and amplitude/phase characteristics of element antenna channels are obtained through deducting relative amplitude and phase characteristics of the antenna and amplitude/phase changes introduced by the spatial distances and axial deflection between each calibration antenna and each array element.

Description

technical field [0001] The invention relates to a method for calibrating the relative amplitude and phase characteristics of the spherical phased array antenna channel in the field of radar and aerospace measurement and control Background technique [0002] Phased array antennas come in many forms, such as linear arrays, planar arrays, circular arrays, cylindrical arrays, spherical arrays, spherical arrays, and conformal arrays that conform to more complex surfaces. The shape of the traditional antenna array is generally spherical, and the electric axis of the antenna feed element installed on it points to the center of the spherical antenna array. During the test, the phase center of the antenna of the equipment under test is required to coincide with the center of the sphere to ensure the simulation accuracy of the signal position of the radio frequency radiation source and accurately control the amplitude of the signal power. Due to the inconsistency of the clocks at the...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G01R29/10G01S7/40
CPCG01R29/10G01S7/40G01S7/4004
Inventor 王文政苏勋俄广西
Owner 10TH RES INST OF CETC
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap