Frequency-tunable dielectric resonator antenna excited by waveguide
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Abstract
This paper presents a method of frequency-tuning a cylindrical dielectric resonant antenna. The basic of proposed method is micro electro-mechanical alteration of the composite cylindrical dielectric resonator. Advantages of the proposed method are the wide range of adjustments and increasing of the total efficiency of the antenna. Two types of antenna were investigated, the excited by waveguide in the standing and running wave mode. The basic antenna characteristics, and also analysis of dependencies of the reflection coefficient, central operating frequency and radiation pattern versus the relative position of components of the cylindrical dielectric resonator are presented. The influence of the geometric dimensions and electrical parameters of the resonator on the efficiency of frequency tuning, radiation efficiency and antenna gain are investigated.
References 11, figgures 7.
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