Plasma microwave isolation device, microwave isolation method and device applications

Abstract

The invention discloses a plasma microwave isolation device, a method for performing microwave isolation by utilizing the device, and device applications. The device of the invention comprises an one-dimensional electromagnetic metamaterial formed by periodically arranging multilayer materials having an A'(BA)<N> type structure, wherein N is the period number. Both of A and A' are nonlinear plasma layers, but the A and the A' have different thicknesses. The B layer is a linear electromagnetic metamaterial layer which is matched with the A layer and both of the dielectric constant and the permeability are negative values. By adjusting the linear dielectric constant and the permeability of the A layer, microwave isolation is realized through the linear dielectric constant and the permeability of the B layer and the electric plasma frequency and the magnetic plasma frequency of the A layer and the B layer. The device of the invention has the advantage of simple mechanism, and the method is easy implement. Moreover, the advantage of high Q value can be realized while realizing the microwave unidirectional propagation or the microwave isolation effect. The device and the method of the invention can be widely used in the field of microwave isolation comprising being used in an antenna transceiver device.

Description

technical field [0001] The invention belongs to the technical field of microwave devices, in particular to a high-efficiency plasma microwave isolation device insensitive to electromagnetic wave incident angle and polarization mode. Background technique [0002] The isolator, also known as the one-way device, is a device that transmits electromagnetic waves in one direction. When the electromagnetic wave is transmitted in the forward direction, it can feed back all the power to the load, and attenuate the reflected wave from the load. The transfer characteristic can be used to isolate the influence of load variation on the signal source. In 2004, scientists such as Hojo studied the dispersion relation of one-dimensional plasma periodic structure, and compared it with the characteristics of photonic crystals, and defined the periodic structure as plasma photonic crystal (H.Hojo and A.Mase, "Dispersion relation of Electromagnetic waves in one-dimensional plasma photonic cryst...

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Problems solved by technology

However, among the existing design schemes, some structures are complex and difficult to process (G.Victor and B.Fabio, "Bistability, multistability and non-reciprocal light propagation in Thue–Morse multilayered structures," New Journal of Physics, vol.12, p.053041,2010.L.Jin,J.Zhou,M.Yang,C.Xue,and M.He,"All-optical diode with photonic multilayers based on asymmetric light localization,"Optical Engineering,vol.50,pp. .030503-030503, 2011.); although some achieve high electromagnetic wave propagation transmittance, the forward transmittance is small (C.Xue, H.Jiang, and H.Chen, "Highly efficient all-optical diode action based on light-tunneling heterostructures,"Optics Express,vol.18,pp.7479-7487,2010.X.Hu,C.Xin,Z.Li,and Q.Gong,"Ultrahigh-contrast all-optical diodes based on tunable surface plasmon polaritons,"New Journal of Physics,vol.12,p.023029,2010.), it is difficult to have broad application prospects

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