Abstract
AbstractMiniaturized circular microstrip antennas (CMSAs) are designed by loading new quasiperiodic sector metamaterials in the substrate. The resonance performances of new antennas are numerically studied. One particular metamaterial CMSA is further experimentally demonstrated operating in the 3.5 GHz band. The practical new CMSA has a patch diameter of 20 mm fabricated on substrates with a dielectric constant of 3. The normalized diameter is hence only about 0.4λg (or 0.232λ0) which is beyond the 0.58λg limitation for a conventional CMSA. The bandwidth and antenna gain characteristics for the new antenna are also evaluated in experiments. Both are observed reasonably high for such a compact CMSA.
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