This research article reports a new Dielectric Resonator Antenna (DRA) with its Dielectric resonator (DR) modified to an “OM” shape for UWB (3.1‐11.1 GHz), to support high data rate multimedia applications for 4G/5G communications. The proposed DRA reports a peak gain of 7.68 dB and a dual polarization behavior for a frequency band from 6 to 11.1 GHz. It has overall antenna dimensions of 50 × 40 × 4.87 mm³ and is fabricated on a commercially available Rogers RT 5880 substrate (with ε_r = 2.2), which is fed using a microstrip feedline with a P‐type transformer that offers an input impedance of 50 Ω to the DR. A conformal strip between the feedline and the OM shaped DR improves the impedance matching at the UWB frequency response of the DRA. This UWB frequency response is mainly because of its optimized “OM” shaped DR structure that excites a TE₁₁₁ mode at 4.9 GHz and two higher order modes TE₂₁₁ and TE₂₂₁ at resonant frequencies of 7.2 and 8.35 GHz, respectively. Additionally the proposed OM shaped DR also generates orthogonal modes of TE₂₁₁^x and TE₂₁₁^y at 6.5 and 7.2 GHz and TE₂₂₁^x and TE₂₂₁^y at 8.35 and 10 GHz, respectively. The proposed DRA therefore exhibits an elliptically polarized behavior with axial ratio bandwidth of 5.1 GHz (≤10 dB) from 6 to 11.1 GHz. A measured impedance bandwidth of 5.25 GHz from 3.8 to 9.05 GHz and 1.5 GHz from 10 to 11.5 GHz and a peak‐measured gain of 7.68 dB at 10.5 GHz (with an average gain of 4.6 dB) has been reported for the proposed DRA. An UWB performance, with good gain properties and an elliptically polarized behavior allows the proposed “OM” shaped DRA to be suitable for short range 4G/5G UWB wireless communications for future multimedia rich WPAN (wireless personal area networks), WLAN, Wi‐MAX, INSAT applications, satellite applications, and X band RADAR (for defense communication) applications.

中文翻译：

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具有缺陷的接地结构和双极化特性的超宽带“ OM”形DRA，用于4G / 5G无线通信

这篇研究文章报告了一种新的介电共振器天线（DRA），其介电共振器（DR）修改为UWB（3.1-11.1 GHz）的“ OM”形状，以支持4G / 5G通信的高数据速率多媒体应用。拟议的DRA报告称，在从6到11.1 GHz的频带上，峰值增益为7.68 dB，具有双极化特性。它具有50×40×4.87毫米整体天线尺寸³和市售罗杰斯RT 5880衬底上制造（与ε _{- [R}= 2.2），它是通过带P型变压器的微带馈线馈电的，该变压器向DR提供50Ω的输入阻抗。馈线和OM形DR之间的共形带改善了DRA在UWB频率响应时的阻抗匹配。这种UWB频率响应主要是由于其优化的“ OM”形DR结构，该结构在4.9 GHz处激发了TE ₁₁₁模式，并在7.2和8.35 GHz的谐振频率上激发了两个更高阶的模式TE ₂₁₁和TE ₂₂₁。此外，建议的OM形DR还生成6.5和7.2 GHz的TE ₂₁₁ ^x和TE ₂₁₁ ^y以及TE ₂₂₁ ^x和TE ₂₂₁ ^y的正交模式分别为8.35和10 GHz。因此，建议的DRA在6至11.1 GHz的频率范围内具有5.1 GHz（≤10dB）的轴向比率带宽，呈现椭圆偏振特性。对于建议的DRA，已报告了从3.8到9.05 GHz的5.25 GHz的测量阻抗带宽和从10到11.5 GHz的1.5 GHz的测量阻抗带宽以及在10.5 GHz的7.68 dB峰值测量增益（平均增益4.6 dB）。具有良好的增益特性和椭圆极化特性的UWB性能使建议的“ OM”形DRA适用于短距离4G / 5G UWB无线通信，适用于未来的多媒体丰富的WPAN（无线个人局域网），WLAN，Wi-MAX ，INSAT应用程序，卫星应用程序和X波段RADAR（用于国防通信）应用程序。