METAMATERIAL-BASED OBJECT-DETECTION SYSTEM

摘要

One embodiment of the present invention related to an object detection system for a vehicle collision avoidance system, uses a metamaterial-based phase shifting element array to generate a scan beam, by varying the effective capacitance of each metamaterial structure forming the array in order to control the phases of radio frequency output signals such that a combined electromagnetic wave generated by output signals is reinforced in a desired direction and suppressed in an undesired direction to generate the scan beam. The metamaterial structures are configured to resonate at the same radio wave frequency as an incident input signal (radiation), and emits an associated output signal by controlled scattering of the input signal. A variable capacitance is applied on each metamaterial structure by using varicaps which are adjusted by phase control voltages, to generate desired output phase patterns. Also the metamaterial structures are manufactured by using an inexpensive metal film or a PCB manufacturing technology.