设计了一种由银纳米纤维周期排列成各向异性的圆环形超材料,在二维空间实现全向辐射的高效率空间功率合成.研究发现在太赫兹频率下该各向异性超材料径向介电常数趋于零.通过数值仿真观察TM极化的电磁波磁场强度经过圆环形径向各向异性零折射超常介质时磁场空间分布.计算表明,无论激励源位置如何和激励源数量多少,TM极化的电磁波磁场强度在经过此超常介质后,总能实现电磁波全向辐射.不同激励源合成的磁场强度通过此径向零折射超常介质能产生空间相干的全向辐射,最终实现全向辐射的空间功率合成.
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