Frequency characteristics investigation of tunable microstrip antenna structure
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Abstract
The micromechanical method of frequency parameters tuning of microstrip antenna with a circular radiator is investigated in paper. It is shown that the change in the size of the air gap between the dielectric substrate and the metal patch changes the effective dielectric constant of line under the antenna which affects the operating frequency of the device, the return loss value and bandwidth. The effect of physical and geometrical parameters of the antenna structure on its radiative characteristics is analyzed. The proposed method enables tuning of antenna parameters in frequency domain increasing the radiation efficiency and extending its operating frequency range. Reference 14, figures 10
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