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A method and system for time-reversal transformation of electromagnetic signals

An electromagnetic signal, time inversion technology, applied in the microwave field, can solve the problems of difficult inversion effect, high cost, large volume, etc.

Inactive Publication Date: 2017-06-09
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Microwave photonic technology requires corresponding laser devices, which are costly and bulky; all-electronic technology uses a combination of passive and active devices, and the inversion effect is difficult to meet the requirements due to the performance problem of the chirped retarder

Method used

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  • A method and system for time-reversal transformation of electromagnetic signals
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Embodiment

[0060] An electromagnetic signal time-reversal transformation system based on leaky wave structure and Rotman lens, such as figure 2 shown. Including a leaky wave structure device 1, a Rotman lens 2, a Rotman lens 3 and a leaky wave structure device 4; the leaky wave structure device 1 and the leaky wave structure device 4 have the same structure, and the Rotman lens 2 and the Rotman lens 3 have the same structure The input terminal of the leaky wave structure device 1 receives the electromagnetic signal to be converted, and the other end is connected with each input terminal of the Rotman lens 2; the output terminal of the Rotman lens 2 is connected with the input terminal of the Rotman lens 3, and the output terminal of the Rotman lens 3 is connected with the input terminal of the Rotman lens 3 The input terminals of the leaky wave structure device 4 are connected, and the output terminal of the leaky wave structure device 4 outputs electromagnetic signals after time invers...

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Abstract

The invention discloses a method and system for time inversion transformation of electromagnetic signals, and relates to the field of microwave technology. The time inversion transformation system includes two leaky wave structure devices and two Rotman lenses, and uses two Fourier transformations to complete the time inversion of the signal waveform, and the process is simple. The time inversion system is completed by microwave passive components, the circuit principle is simple, the structure is compact, and it is easy to realize. The number of input and output terminals of the Rotman lens can be adjusted, which is suitable for different accuracy requirements of time domain signal inversion transformation. The leaky wave structure device can realize the conversion of the time domain signal to the air domain, and the high-speed microwave switch ensures the accuracy of the signal inversion transformation performed by the whole system. The invention can realize high-speed, high-efficiency and real-time inversion transformation of microwave signals, and can be used in time inversion electromagnetic application systems.

Description

technical field [0001] The invention relates to the field of microwave technology, in particular to a method for time-reversal transformation of electromagnetic signals and a system for time-reversal transformation of electromagnetic signals based on microwave passive devices such as leaky wave structures and Rotman lenses. Background technique [0002] Since time-reversal technology was introduced into the field of electromagnetic waves, it has been widely used in high-resolution target detection and imaging, high-speed wireless communication and other fields because it can realize the time-space synchronous focusing characteristic of electromagnetic signals. The key part of the time-reversal electromagnetic application system is how to perform real-time and efficient time-reversal transformation of electromagnetic signals. Based on digital signal processing technology, the method of performing DA conversion after AD sampling processing has poor real-time performance, high ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V3/38
Inventor 孙程光李家林王秉中
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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