Design of a dual-band MIMO dielectric resonator antenna with high port isolation for WiMAX and WLAN applications

In this article, a dual port aperture coupled MIMO cylindrical dielectric resonator antenna with enhanced isolation is proposed. Dual feeding techniques are used to excite dielectric resonator. These feeding structures are oriented in such a way so that they can produce orthogonal mode in the dielectric resonator. High isolation is observed by generating two orthogonal modes, that is, HE11δy and HE11δx in the dielectric resonator. The fractional bandwidth for port 1 and port 2 is 17.8% (3.1‐3.68 GHz) and 18.4% (3.1‐3.7 GHz), respectively, and isolation between the two ports exceeds −25 dB within the required band. The proposed antenna is simulated, fabricated, and experimentally tested. Good agreements between measured and simulated results are observed. The various diversity performance parameters are also lie within their acceptable limits. Based on presented results, it can be concluded that the presented MIMO antenna is suitable for WiMAX (3.3‐3.6 GHz) applications.

Section: Resultsmentioning

confidence: 99%

“…Therefore, ohmic losses are larger with port-1 as compared to port-2 (due to the presence of dual aperture in port-1) which in turn reduces the radiation efficiency and gain with port-1. 16…”

Section: R E S U L T S a N D Discussionmentioning

confidence: 99%

Dual port aperture coupled MIMO cylindrical dielectric resonator antenna with high isolation for WiMAX application

Das

Sharma

Gangwar

2017

“…Nowadays, dual frequency antennas are mostly desired because of increasing wireless applications. In the scientific literature, dual band MIMO DRAs are proposed, for example, in References 5–10, but the discussed solutions refer to linearly polarized antennas. In Reference 11, a tri‐band dielectric resonator based hybrid antenna for WLAN/WiMAX application is reported.…”

Section: Introductionmentioning

confidence: 99%

Dual‐band circularly polarized MIMO DRA for sub‐6 GHz applications

Singhwal

Kanaujia

Singh

et al. 2020

In this article, a dual‐band circularly polarized multiple‐input‐multiple‐output (MIMO) dielectric resonator antenna (DRA) is proposed for 3.5 and 5.5 GHz bands, both being located under 6 GHz. Known as sub‐6 (or as mid‐band), they provide good coverage and capacity in the newly targeted fifth‐generation (5G) systems. The proposed structure consists of two ring DRAs (RDRAs) etched on a 0.8 mm thick RT Duroid substrate. Measured impedance bandwidths in broadside direction are 3.1‐3.75 GHz (19%) and 5.3‐5.6 GHz (9.4%) and circular polarization (CP) bandwidths are 3.425‐3.6 GHz (5%) and 5.45‐5.55 GHz (2%), respectively. CP is achieved by exciting HE modes using two probes placed orthogonaly to each other, that is, at an azimuthal angular distance of 90∘. Varying the lengths of the probe allows achieving the necessary time‐phase quadrature between modes. Comparison between recent multiband circularly polarized MIMO DRAs and proposed prototype has revealed that CP bandwidth in both bands is one of the highlighting advantages of the present configuration.

“…A quad‐port hybrid MIMO antenna comprised of cross dipole structure, a parasitic element, and annular ring ground was reported for local area networking applications . In comparison to nonplanar antenna structures, the radiators are arranged in the same plane in planar MIMO systems . However, the orthogonal mode excitation is popularly used for isolation improvement in both planar and nonplanar cases.…”

Section: Introductionmentioning

confidence: 99%

Three‐dimensional cylindrical design multiple‐input‐multiple‐output/diversity antenna with high isolation for wireless communication applications

Mishra

Das

Pattnaik

et al. 2019

In this article, a three-port nonplanar multiple-input-multiple-output/diversity antenna with very high isolation between the radiating elements is presented. To realize diversity from the proposed three-dimensional (3-D) antenna configuration, three monopole radiating elements are arranged at an angle of 120 . The isolation between the radiators is enhanced by using a multilayered cylindrical decoupling structure and defected ground structure (DGS). The DGS reduces the coupling due to surface waves while the cylindrical decoupling structure reduces the coupling due to space waves. The proposed antenna offers consistent pervasive connectivity in the wireless communication environment due to its 3-D geometry with multiple radiating elements and good diversity performance. The prototype is fabricated and measured result shows that more than 42 dB isolation is obtained at the center frequency 1.45 GHz. An increment of 1.2 dBi in the antenna gain is also achieved by using DGS and decoupling structure arrangement. The proposed antenna can be easily placed inside the cylindrical housing or it can be integrated with the existing electronics chip, thus nullifying the requirement for dedicated location in the system. K E Y W O R D Scylindrical decoupling structure, DGS, isolation, MIMO, monopole, diversity