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access icon free Active metamaterial absorber with controllable polarisation and frequency

An active metamaterial absorber with electrical control of both polarisation and frequency is presented. The unit cell of the proposed absorber consists of an outer circular ring and an inner Jerusalem cross with two pin diodes mounted between. Tuning the diodes ON/OFF states, the absorption response of the metamaterial structure can be switched between two performances. As biasing the diodes OFF, a dual-band absorption response with polarisation-independent characteristics can be achieved. Although regarding to ON state, a polarisation-dependent performance is exhibited. Specifically, the same dual-band absorption response can be still obtained with respect to the incident wave with electrical field along the x-axis, whereas a different single band of absorption is obtained with electrical field along the y-axis. The simulated and measured verifications are presented and the results demonstrate the proposed controllable absorption performances.

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http://iet.metastore.ingenta.com/content/journals/10.1049/el.2017.1618
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content/journals/10.1049/el.2017.1618
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