Abstract
In this paper, a dielectric resonator antenna (DRA) with high gain and wide impedance bandwidth for fifth-generation (5G) wireless communication applications is proposed. The dielectric resonator antenna is designed to operate at higher-order mode to achieve high antenna gain, while a hollow cylinder at the center of the DRA is introduced to improve bandwidth by reducing the quality factor. The DRA is excited by a microstrip line with a narrow aperture slot. The reflection coefficient, antenna gain, and radiation pattern of the proposed DRAs are analyzed using the commercially available full-wave electromagnetic simulation tool CST Microwave Studio (CST MWS). In order to verify the simulation results, the proposed antenna structures were fabricated and experimentally validated. Measured results of the fabricated prototypes show a 10-dB return loss impedance bandwidth of 10.7% (14.3–15.9GHz) and 16.1% (14.1–16.5 GHz) for DRA1 and DRA2, respectively, at the operating frequency of 15 GHz. The results show that the designed antenna structure can be used in the Internet of things (IoT) for device-to-device (D2D) communication in 5G systems.
Highlights
The presumptions and challenges of the ever-growing traffic explosion drew increased attention toward the significant research activity and development of fifth-generation (5G) wireless communication technology [1]
High-gain antennas are required to solve the problems of high path loss and increase the transmission range related to the high-frequency band [6,7]
The proposed structure achieved a wide bandwidth and high gain operating in higher-order mode using a new approach of putting a cylindrical hole at the center of the dielectric resonator antenna (DRA)
Summary
The presumptions and challenges of the ever-growing traffic explosion drew increased attention toward the significant research activity and development of fifth-generation (5G) wireless communication technology [1]. The major drawback of this approach is that it uses two or more dielectric resonator elements with same or different primitivities; it increases the size of the antenna, as well as the cost Another technique used for increasing the gain of the DRA is the integration of additional structures [24,25]. The higher-order mode technique has been adopted to enhance the gain of DRAs [27,28] This method has distinct benefits compared to other gain enhancement techniques because it demonstrates high gain and requires a small area with a simple structure, which are attractive features for modern communication systems. This approach has the main problem of narrow impedance bandwidth.
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