Abstract
A physically accomplished truncated conical dielectric ring resonator (DRR) is designed and experimented to validate the performance parameters. The DRR loaded on brass ground plane fed by coaxial probe resonates in three frequencies: 12.5, 19.7, and 23.5 GHz. Among three resonances, the first one is radiating and shows reasonable broadside gain of 4.3 dBi. The higher resonances are nonradiating and offer very low gain. The frequency selective metasurface walls are realized by complementary split Ring resonators and positioned sensitively near the conical DRR. The gain performance at 12.5 GHz has been improved to 18 dBi with -10 dB impedance bandwidth of 900 MHz (12.2-13.1 GHz) by incorporation of lateral frequency selective surface wall with suppression of higher nonradiating modes. The proposed antenna structure has been designed, simulated with the commercially available HFSS software to achieve the optimized dimension and validated with the measurement results.
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