减少光束斜视的超材料串联线性偶极子阵列

M. Antoniades, G. Eleftheriades
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引用次数: 36

摘要

近年来,通过在主传输线(TL)上周期性加载集总元串联电容器和分流电感器来实现负折射率(NRI)介质,导致了许多基于负折射率-TL超材料(MTM)的实用器件的发展。MTM馈电网络在串联馈电线性阵列中被证明是有用的,可以有效地取代单波长长的传统弯曲传输线,从而实现紧凑、宽侧的辐射体,其光束随频率的变化眯眯较小。此外,MTM馈电网络可用于创建线性阵列,其主波束在频率变化时几乎保持固定在与宽频面成负角度。另外,在辐射锥内运行的单个CPS MTM馈线可用于实现漏波天线(LWA),该天线可被识别为CPW线的对偶,以创建向后LWA
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A Metamaterial Series-Fed Linear Dipole Array with Reduced Beam Squinting
The recent implementation of negative-refractive-index (NRI) media by periodically loading host transmission-lines (TL) with lumped-element series capacitors and shunt inductors has led to the development of numerous practical devices based on NRI-TL metamaterials (MTM). The MTM feed networks were shown to be useful in series-fed linear arrays for effectively replacing one-wavelength long conventional meandered transmission lines, thus achieving compact, broadside radiators, whose beam squints less with frequency. In addition, the MTM feed networks can be used to create linear arrays whose main beam remains virtually fixed at a negative angle from broadside as the frequency is varied. Alternatively, a single CPS MTM feedline operating inside the radiation cone can be used to implement a leaky-wave antenna (LWA), which can be recognized as the dual of the CPW line to create a backward LWA
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