CONTROLLED DISCONTINUITY Russian patent published in 2006 - IPC H01Q15/10 H01Q15/14 H01Q21/00 

FIELD: radio communications and microwave engineering; data transfer and reception dispensing with line carrier-signal source.

SUBSTANCE: controlled discontinuity made in the form of flat laminated medium incorporating first uncontrolled grating, first insulating layer, second uncontrolled grating, second insulating layer, controlled layer in the form of two-dimensional periodic grating of conducting components (strips and rods) with controlled components inserted in series with them is characterized in that any passive components having nonlinear characteristics are chosen as controlled components; connected to controlled components are two primary-signal sources with respective subcarriers and two recording devices. Geometric parameters of first and second gratings are chosen so as to ensure desired values of ether conductivity B¹ ₁ of first uncontrolled grating and conductivity B¹ ₂ of second uncontrolled grating at echo-signal frequency f₁ or conductivities B¹ ₂, B² ₂ at transmitted-signal frequency f₂. Mathematical formulas for finding these values are given in description of invention. Thickness d₁ of first insulating layer is chosen from following condition: 0 < d₁ ≤ λ/4n₁; refractive indices of first and second insulating layers n₁ and n_2, respectively, are chosen from following expressions: 1 ≤ n₁ ≤ 10; 1 ≤ n₂ ≤ 10.

EFFECT: reduced mass and size of device.

1 cl, 8 dwg