Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Double-difference beam angle measurement method and system

A technology of difference beam and angle measurement, which is applied in the field of double-difference beam angle measurement method and system, can solve the problems of increased interference, angle measurement error, and beam channel gain reduction, etc., to ensure accurate positioning, improve performance indicators, suppress The effect of outside interference

Inactive Publication Date: 2015-09-23
SHANGHAI RADIO EQUIP RES INST
View PDF2 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the antenna beam points to a large angle away from the antenna boresight, the gain of the sum beam channel will decrease, and the interference entering the sum beam channel will increase. At this time, using the traditional sum and difference three-channel angle measurement method will Angle measurement brings large error

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
  • Double-difference beam angle measurement method and system
  • Double-difference beam angle measurement method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] In order to describe in detail the technical content, structural features, achieved goals and effects of this method, the following will be described in detail in conjunction with the embodiments and accompanying drawings.

[0031] The double-difference beam angle measurement method and system of the present invention utilizes the signals obtained by performing two difference channels on the four quadrants of the antenna, and compares the phase or amplitude with the signals of the traditional difference channels respectively, so as to realize the angular error measurement of the large-angle target.

[0032] see figure 1 and figure 2 , the implementation of the inventive method comprises the steps:

[0033] S1. Divide the antenna front into four quadrants, namely quadrant A, quadrant B, quadrant C and quadrant D;

[0034] S2. Using the microwave signal synthesis network in the antenna to form two sum signal channels, which are respectively sum channel A+B and sum chan...

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 present invention relates to a double-difference beam angle measurement method and system for achieving angle measurement for an object by utilizing double difference beam channels formed by four quadrants of an antenna. According to four quadrants of an antenna array surface, two sum signal channels, four difference signal channels, a secondary difference signal channel, an azimuth difference channel and a pitching difference channel are obtained; an azimuth angle is obtained through comparison between a signal of the secondary difference signal channel and a signal of the azimuth difference channel; and a pitch angle is obtained through comparison between the signal of the secondary difference signal channel and a signal of the pitching difference channel. The method and the system of the present invention can effectively suppress external interference, and can perform accurate angle measurement for an object within a large angle range deviating from a visual axis direction of the antenna, thereby ensuring accurate positioning for multiple objects by a phased array radar.

Description

technical field [0001] The invention relates to a phased array radar angle measurement technology, in particular to a double-difference beam angle measurement method and system. Background technique [0002] Monopulse angle measurement technology is a technology to obtain the signal angle by measuring a detected single pulse. The monopulse angle measurement technology is mainly used for tracking radar, which is used to measure the angle of a target relative to the boresight of the radar antenna, through which the angle error is fed back to the antenna, so that the target is as close as possible to the boresight of the antenna. [0003] Monopulse angle measurement technology is mainly divided into two categories, namely, phase ratio monopulse technology and amplitude ratio monopulse technology. Both the phase ratio and the amplitude monopulse divide the antenna into four quadrants. The phase comparison method utilizes the phase difference between the four quadrants, and 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): G01S13/68
CPCG01S13/68
Inventor 李秒余牟成虎
Owner SHANGHAI RADIO EQUIP RES INST
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com