Dielectric loaded Small Antenna Using Defected Ground Structure
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Abstract
A novel technique for designing small size printed antenna is proposed which is suitable for portable and multifunctional communication systems. The proposed design consists of material loading using high permittivity cylindrical rods underneath the patch and Defected Ground Structure (DGS) in the ground
plane. The DGS consists of L-shaped, U-shaped and I-shaped slots. The size of the antenna has been reduced
by66% as compared to a conventional antenna resonating at the same frequency. The other key feature
of this antenna is impedance matched multiband response within 1-8GHzband with acceptable gain up
to 4.1dB. All simulation results in this paper have been achieved from the CST Microwave Studio solver. This
small size antenna can be used in portable devices for WiMAX, GPS, WLAN and Bluetooth applications.
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