含有左手介质双层基底的亚波长谐振腔微带天线研究

将谐振腔引入微带结构,分析和设计了含有左手介质双层基底的亚波长谐振腔微带天线.基于左手介质对右手介质的相位补偿效应,此新型微带天线的高度并没有因为双层基底而大为增加,反而有所降低.计算表明：在一些情况下,大幅度提高的带宽特性突破了传统微带天线的窄带局限,而在另一些情况下,所得到窄带微带天线能够在单频率点谐振鉴频.针对这一特性,将亚波长谐振腔微带天线应用于探测器中,显示了此新型微带天线在目标探测上的优势. 关键词： 微带天线 左手介质 谐振腔

Subwavelength cavity resonator microstrip antennas based on left-and right-handed metamaterial bilayered substrates

By introducing cavity resonators to microstrip structures, subwavelength cavity resonator microstrip antennas with left- and right-handed metamaterial bilayered substrates are proposed and investigated. Due to the phase compensation, the total height of the antennas is reduced rather than increased. With certain sets of parameters, as a breakthrough to the restricted bandwidth of the conventional microstrip antennas, greatly broadened bandwidth can be achieved. Under other conditions, antennas with narrow bandwidth and resonant sensitivity can be realized. Corresponding applications for sensor use are proposed, and distinct advantages over the nonresonant electromagnetic wave sensors are demonstrated.