Research on the focusing mechanism of one dimensional time reversal EM wave in sub-wavelength metal wire array

Abstract

Based on the equivalent dielectric model of the periodic metal wire array, the analytical expression of time reversal EM wave in the metal wire array is derived using transmission line method. Then, the influence of metal wire radius, metal wire array period and the amount of layers on time reversal EM wave focusing property is discussed within the equivalent dielectric model. This structure can be used to focus time reversal EM wave in the far field, at the same time, it provides an engineering reference for time reversal technique.

Split-ring-based metamaterial for far-field subwavelength focusing based on time reversal

“…Besides, the space-time focusing property of the TR electromagnetic wave is also helpful to improve imaging resolution. [14][15][16][17][18][19] Later reports indicate that the near-field scatters can be replaced by micro-patternsetched array elements. Subwavelength arrays composed of such array elements, which achieve the super-resolution characteristic with the TR technique, were reported.…”

The determination of the relative permittivity of periodic stratified media based on the iterative time-reversal method

“…Yet, due to unknown parameters and the complexity of propagation, measurements for multi-layer media are still challenging. [5,6] Recently, because of its adaptive focusing property, the time-reversal technique has been used in wireless communication, [7][8][9][10][11] nondestructive testing, [12,13] object positioning, [14,15] object imaging, [16,17] and super-resolution focusing. [18][19][20][21] The focusing signals always show autocorrelation of the propagator in the time domain.…”

“…[5,6] Recently, because of its adaptive focusing property, the time-reversal technique has been used in wireless communication, [7][8][9][10][11] nondestructive testing, [12,13] object positioning, [14,15] object imaging, [16,17] and super-resolution focusing. [18][19][20][21] The focusing signals always show autocorrelation of the propagator in the time domain. This behavior allows the time-reversal waves to exhibit adaptive focusing.…”