Air Force-funded researchers at HRL Laboratories in Malibu, Calif., are working on holographic impedance surfaces for antennas that will give aircraft improved aerodynamics.
A proper integral filter is designed to parallel with the Fourier system Thus the influence of DC offset onimpedance calculation is cancelled.
傅里叶系统并联一个适当的积分滤波器以后可以消除非周期分量对阻抗计算的影响。
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In this paper, room sound field theory as the basis of measurement based on reverberation chamber and waveguide theory as the basis of measurement based onimpedance tube are introduced.