Patent ID: 6300894
Filing Date: 2001-10-09
Classification: G01S,H01Q

Abstract:
An RF energy interface comprising a laminate structure of a core layer of ferromagnetic ceramic material, having a permitivity that is electrically controllable to modify the behavior of impinging electromagnetic energy, opposite surfaces of said ceramic core having an electrically conductive material thereon, and a differential DC voltage applicator coupled thereto so as to impart a differential voltage to said core layer, said applicator being operative, during transmit/receive mode of an antenna application to set said differential voltage at a first value that renders said laminate structure reflective to RF energy, and during other times, to set said differential voltage at a second value that renders said laminate structure effectively transparent to said RF energy, and during transmit/receive mode of a radome application, being operative to set said differential voltage at a third value that renders said laminate effectively transparent to RF energy, and during other times, to set said differential voltage at a fourth value that is effective to render said laminate effectively absorbent of said RF energy.