PROBLEMS ASSOCIATED WITH DESIGNING STRIPLINE RESONATOR FOR WIDE BAND MATERIAL CHARACTERIZATION

Document Type : Original Article

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Egyption Armed Forces.

Abstract

The electrical properties of the dielectric materials can be described in terms of their relative dielectric constant and dielectric loss tangent. To measure these electrical properties at microwave frequencies, the most commonly used technique is the resonant technique. This technique relates the measured resonant frequency and the quality factor of a resonator to the characteristic of the material from which it was constructed. The coplaner coupled stripline resonator is a modified version of the stripline resonator to increase the accuracy of measurements. This paper presents an analysis of the coplaner coupled stripline resonator technique as will as the proper design of it's gap, a Pspice model of this gap, and finally presents a discussion of the capacitance behavior .of this gap above some certain frequencies depending on the dimensions of the gap.

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