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Time inversion transformation method and system for electromagnetic signal

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

Inactive Publication Date: 2015-07-15
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • 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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  • Time inversion transformation method and system for electromagnetic signal
  • Time inversion transformation method and system for electromagnetic signal
  • Time inversion transformation method and system for electromagnetic signal

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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 time inversion transformation method and a time inversion transformation system for an electromagnetic signal, and relates to the technical field of microwaves. The time inversion transformation system comprises two leaky-wave apparatuses and two Rotman lenses and completes the time inversion of a signal waveform by two Fourier transforms, and the process is simple. The time inversion transformation system is implemented by a microwave passive device, is simple in circuit principle, compact in structure and easy to implement. The number of input and output terminals of the Rotman lenses can be adjusted so as to meet the requirements on different accuracies of the inversion transformation of a time domain signal. The leaky-wave apparatuses can convert the time domain signal into an air domain signal, and a high-speed microwave switch ensures the accuracy of signal inversion transmission of the whole system. The time inversion transformation method and the time inversion transformation system for the electromagnetic signal can implement the high-speed, high-efficiency and real-time inversion transformation of the microwave signal, and can be applied to a time inversion electromagnetic application system.

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 Applications(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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