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A radio frequency multi-beam intelligent imaging system based on analog-digital hybrid two-dimensional phased array

An analog-to-digital hybrid and imaging system technology, applied in radio wave measurement systems, using re-radiation, radio wave reflection/re-radiation, etc., can solve problems such as invasion of privacy, manual monitoring visual fatigue, and inability to cover the body

Active Publication Date: 2019-02-15
慕丰浩 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, in the anti-terrorism human body security inspection microwave imaging system, the clothes of people are transparent and cannot cover the body, which violates people's privacy. In addition, a large amount of image information causes visual fatigue of manual monitoring.

Method used

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  • A radio frequency multi-beam intelligent imaging system based on analog-digital hybrid two-dimensional phased array
  • A radio frequency multi-beam intelligent imaging system based on analog-digital hybrid two-dimensional phased array
  • A radio frequency multi-beam intelligent imaging system based on analog-digital hybrid two-dimensional phased array

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Embodiment Construction

[0024] The block diagram of the analog-digital hybrid two-dimensional array radio frequency multi-beam intelligent imaging system is shown in figure 1 . The analog-digital hybrid two-dimensional array radio frequency multi-beam intelligent imaging system includes an antenna array and a corresponding receiving channel array. The receiving channel array has NxM receiving units, that is, there are N groups of units in the direction of the first dimension, and there are M groups of units in the direction of the second dimension, where the groups can be rows or columns. In other words, arrays can be placed horizontally or vertically.

[0025] Each receiving unit in the receiving channel array includes: antenna input circuit, such as input balun or RF filter; RF receiving low-noise amplifier is used to amplify RF signal; one-stage or two-stage down converter, down-converting input RF signal Frequency conversion to baseband signal; radio frequency bandpass filter or intermediate fr...

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Abstract

The invention discloses an analog and digital hybrid two-dimensional phased array radio frequency multiple-beam intelligent imaging system. The system comprises an antenna array and a corresponding receiving array; each receiving unit in the receiving array comprises a radio frequency receiving low-noise amplifier, down conversion frequency converters, a baseband low-pass filter and a multi-channel analog baseband multi-beam forming matrix unit. The array multi-beam imaging system can receive incoming radio frequency signals simultaneously, performs analog multi-beam forming and digital multi-beam forming sequentially, and forms two-dimensional image signal output. An artificial intelligent visual neural network or image processing software is adopted, and machine vision is utilized to replace human visual monitoring, and therefore, detection speed is higher.

Description

technical field [0001] The invention relates to the application of microwave phased array or MIMO array, such as microwave imaging technology, satellite communication and satellite remote sensing technology. Applications include anti-terrorism human body security inspection microwave imaging, satellite remote sensing microwave imaging. Background technique [0002] The complete analog RF phased array can only form a single beam, so its receiver has slow speed in search and scan, low signal-to-noise ratio, and short detection distance. Using analog RF phased array single-beam technology for two-dimensional imaging has disadvantages such as low sensitivity and long imaging time. [0003] The digital multi-beam RF phased array receiver can overcome the analog RF phased array and can generate two-dimensional signals at the same time. It is a theoretically ideal phased array receiving system. However, in practice, it can only be realized in a narrowband system. The reason is th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/89G01S13/88
CPCG01S13/887G01S13/89
Inventor 慕丰浩徐立
Owner 慕丰浩
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