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A non-uniform high impedance surface (NU-HIS or tapered HIS) is proposed against a uniform HIS (U-HIS). The surfaces are one dimensional (1D) and made of parallel wires with a length a little less than half wavelength. To show the effects of the surfaces, a half wavelength dipole antenna is placed near three different surfaces, PEC, U-HIS, NU-HIS while the(More)
The reflection coefficient (Gamma) of an antenna under test (AUT) was measured from 1-port time domain reflectometry (TDR) measurement. Since the TDR measurement is a 1-port measurement, error can be smaller than 2-port measurement technique. In this paper we provide a review of different methods, which is used in time domain for computing Gamma from(More)
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