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.
A conical sectored dielectric resonator antenna (DRA) loaded on S‐shaped slot square patch for wideband circular polarization is investigated. Wideband circular polarization (CP) is achieved by single tab extended at right top corner of the square patch along with the introduction of sectors on the top of DRA and S‐shaped slot on the patch. Calculated size of slot along with optimized height and size of DRA through parametric study helps to get wide impedance bandwidth. In addition, optimized size of single tab gives the wide axial ratio bandwidth. The −10 dB impedance bandwidth is 100.18% (2.1–6.0 GHz) and 3‐dB axial ratio (AR) bandwidth is 69.52% (3.0–6.2 GHz). The gain variation is around 3 dBi and radiation efficiency is around 80%–95% within the AR bandwidth. The proposed model is fabricated and measured which agree well with the simulated results.
A compact truncated conical Dielectric Resonator Antenna (DRA) is presented. The truncation at the upper side of the DRA makes it useful for the microwave application(X, Ku and K band). The antenna resonates at three frequencies of 12.9 GHz, 19.7 GHz and 23.5 GHz with good impedance matching. The gains at three resonant frequencies are more than 5 dBi. The antenna is excited with TM01 mode to give apple shaped omni directional radiation pattern for triple bands.
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