Abstract

Tunable antennas have become research hotspots due to their applicability and practicability. To get rid of complex peripheral facilities, a novel design featuring an efficient actuating strategy by liquid-gas phase transition is proposed, which consists of liquid metal embedded in soft polymer and alcohol stored above a ceramic heater. By simply applying voltage on the heater to induce evaporation of working medium, there appears a sharp increasement in internal pressure, which pushes the liquid metal antenna continuously from planar to tridimensional state. Both the experimental and numerical results demonstrate the effectiveness of the actuating strategy to adjust the antenna configuration.

摘要

可调谐天线因其适用性和实用性而成为研究热点。为了摆脱复杂的外围设备，提出了一种新颖的设计，该设计采用液-气相变的有效驱动策略，由嵌入软聚合物中的液态金属和储存在陶瓷加热器上方的酒精组成。通过简单地在加热器上施加电压来诱导工作介质的蒸发，内部压力会出现急剧增加，从而推动液态金属天线不断地从平面状态变为三维状态。实验和数值结果都证明了驱动策略调整天线配置的有效性。