Patent ID: 8674870
Filing Date: 2014-03-18
Classification: G01S,H01Q,H04B

Abstract:
1. An electromagnetic reflector comprising: a) an antenna that receives an incoming signal and that transmits an active outgoing signal; b) a three-port non-reciprocal device having a first port electromagnetically coupled to the antenna, a second port, and a third port; and c) a circuit having an input electromagnetically coupled to the second port of the three-port non-reciprocal device and having an output electromagnetically coupled to the third port of the three-port non-reciprocal device, the circuit changing at least one of a gain and a phase of the incoming signal to generate the active outgoing signal that passes through the three-port non-reciprocal device to the antenna, the active outgoing signal combining with a passive reflection signal from a surface to form a desired outgoing signal.