Vol. 26

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2011-08-27

Impedance Measurement of Millimeter Wave Metamaterial Antennas by Transmission Line Stubs

By Gheorghe Ioan Sajin
Progress In Electromagnetics Research Letters, Vol. 26, 59-68, 2011
doi:10.2528/PIERL11072004

Abstract

The paper deals with a method to measure the unknown impedance of metamaterial antenna made in Composite Right/Left-Handed (CRLH) Co Planar Wavegiude (CPW) technique for the millimeter wave frequency domain. The method uses a measurement setup made of a high frequency vector network analyzer (VNA) and an on-wafer characterization equipment. The measurement procedure consists in placing the probe-tip of the on-wafer equipment and to move it along the feedline of the antenna radiating structure until the minimum values of the return loss is reached. Using the facilities of the on-wafer equipment (micrometric screws to move the probe-tips) and knowing the geometrical dimensions of the antenna structure, the dimension and the position of an equivalent open-circuit matching stub are obtained. Then, using relationships derived from the transmission lines theory, real and imaginary parts of the unknown antenna impedance are computed.

Citation


Gheorghe Ioan Sajin, "Impedance Measurement of Millimeter Wave Metamaterial Antennas by Transmission Line Stubs," Progress In Electromagnetics Research Letters, Vol. 26, 59-68, 2011.
doi:10.2528/PIERL11072004
http://www.jpier.org/PIERL/pier.php?paper=11072004

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