A Novel Hemispherical Dielectric Resonator Antenna With Complementary Split-Ring-Shaped Slots and Resonator for Wideband and Low Cross-Polar Applications


During this paper, a unique hemispherical dielectric resonator antenna (HDRA) with complementary split rings and slots is proposed and investigated. The complementary split-ring resonators (CSRRs) are etched from the bottom plane,&#thirteen; that are pierced though slots extending from the bottom plane up to the HDRA. The dielectric material used is Rogers TMM10, which has a dielectric constant of ""r ?? 9:a pair of. The CSRR-shaped slot on HDRA lowers down the quality&#thirteen; factor (Q-issue) of the antenna, thus enhancing the bandwidth. Furthermore, this distribution across the CSRR slots on the bottom plane is out of part, that results in current cancelation along the CSRR and hence reduces&#thirteen; the cross-polar part of the radiation pattern significantly. The measured price of bandwidth of the proposed structure is thirtypercent centered at 1.9 GHz, giving a gain of 6 dBi. The cross-polar level is additional than forty dB, which is a lot of less than the copolar pattern. The primary 2 modes of the HDRA are preserved.


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