| 摘要 |
A metamaterial-based phase shifting element utilizes a variable capacitor (varicap) to control an effective capacitance of a metamaterial structure in order to control a phase of a radio frequency output signal generated by the metamaterial structure. The metamaterial structure is configured to resonate at the same radio wave frequency as an incident input signal (radiant ray), whereby the metamaterial structure emits an output signal by controlled scattering of the input signal. A variable capacitance applied on the metamaterial structure by the varicap is adjustable by way of control voltage, whereby an output phase is adjusted by adjusting the control voltage. The metamaterial structure is constructed by using an inexpensive metal film or a printed circuit board (PCB) fabrication technology, and includes: an upper metal ″island″ structure, a lower metal backplane layer, and a dielectric layer sandwiched therebetween. The varicap is connected between the island structure and a base metal structure that surrounds the island structure. |
