Air Force-funded researchers at HRL Laboratories in Malibu, Calif., are working on holographic impedance surfaces for antennas that will give aircraft improved aerodynamics.
受到美国空军资助的加州马里布hrl实验室的研究人员正在致力于天线的全息阻抗表面研究，以此为飞机提供更好的空气动力性能。
The impedance characteristics of the cactus antenna are analyzed, and the principle of the cactus antenna working well over wide frequency band is explained.
用多端口网络理论分析该天线的阻抗特性，阐明该天线能够实现宽频带工作的原理。
This paper gives a theoretical description of the working modes and impedance matching conditions of a 3-port broadband waveguide circulator.
本文对波导环行器的工作模式和阻抗匹配进行了理论探讨。
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