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Book ChapterDOI

Cylindrical Dielectric Resonator Antenna with a Key-Shaped Microstrip Line for 2.4 GHz Wireless Applications

01 Jan 2023-pp 331-339
TL;DR: In this article , a small cylindrical DRA antenna with a partial ground plane fed by a key-shaped microstrip line is presented, which has a band that goes from 2.03 to 3.06 GHz and a fractional bandwidth of 40%.
Abstract: This work presents a small cylindrical DRA antenna with a partial ground plane fed by a key-shaped microstrip line. It is made up of a 9.8 relative permittivity resonator and a dielectric constant of 4.4 FR4 substrate. To improve the antenna’s performance, partial ground plane and feeding mechanism techniques were used. HEM11δ basic mode is transmitted through DRA via the key-shaped microstrip line connected to the antenna. DRA excited the fundamental frequency by aligning the DRA’s position, which results in more coupling. The proposed antenna has a band that goes from 2.03 to 3.06 GHz and a fractional bandwidth of 40%. The concept proposed here is ideal for Wi-Fi applications.
References
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Journal ArticleDOI
TL;DR: Several novel elements are presented that offer significant enhancements to parameters such as impedance bandwidth, circular-polarization bandwidth, gain, or coupling to various feed structures in the dielectric-resonator antenna environment.
Abstract: This paper features some of the advances in dielectric-resonator antenna technology at the Communications Research Centre. Several novel elements are presented that offer significant enhancements to parameters such as impedance bandwidth, circular-polarization bandwidth, gain, or coupling to various feed structures. Several linear and planar arrays are also presented, to illustrate the performance of dielectric-resonator antenna elements in the array environment.

450 citations

Journal ArticleDOI
TL;DR: Based on the enlarged DRA design, a stacked DRA (sDRA) is proposed to improve the bandwidth from 8.7% to 15% and enhance the realized gain by an average of 1.5 dB.
Abstract: In this communication, a rectangular dielectric resonator antenna (DRA) is integrated with a backed cavity to enlarge the DRA side length by 1.8 times. The backed cavity also reduces the sensitivity of the DRA resonance to the DRA size, resulting in a relaxed fabrication tolerance. Based on the enlarged DRA design, a stacked DRA (sDRA) is proposed to improve the bandwidth from 8.7% to 15% and enhance the realized gain by an average of 1.5 dB. The proposed mechanisms are verified by fabricating a $4\times4$ sDRA array with an enlarged DRA side length of 1.8 mm ( $0.40 {\lambda }$ ), an improved bandwidth of 62.7–73.9 GHz (16.4%), and an enhanced measured gain of up to 17.2 dBi. The enlarged DRA dimension permits a higher DRA operating frequency without reducing the DRA size. The proposed millimeter-wave (mmW) sDRA array provides a wide bandwidth and high-gain solution for 67 GHz unlicensed band communications.

33 citations

Journal ArticleDOI
TL;DR: In this article, a compact rectangular dielectric resonator antenna (RDRA) was designed for wireless applications, where a metal plate has been attached to top surface of the RDRA to achieve signiflcant reduction in the resonant frequency of the antenna.
Abstract: This paper presents the design of a compact rectangular dielectric resonator antenna (RDRA) for wireless applications. A metal plate has been attached to top surface of the RDRA to achieve signiflcant reduction in the resonant frequency of the antenna. A simple microstrip feeding mechanism has been used to excite this compact rectangular DRA. Performance parameters such as resonant frequency, impedance bandwidth, and volume of this compact RDRA are compared with those of the conventional RDRA. Measured characteristics of these RDRAs are in good agreement with the simulated results. The size of the compact RDRA using a low dielectric constant ("r = 10:3) material resonant at 2.4GHz is 30mm£10mm£ 6:3mm with a ground plane size of 200mm £ 200mm.

22 citations

Journal ArticleDOI
TL;DR: In this paper, various fractal geometries have been introduced for antenna applications, and the main objective of fractal applications is to reduce the size of the antenna for wideband characteristics, while maintaining other design parameters at an acceptable level.
Abstract: Until the 1980s, shielded dielectric resonators (DRs) were used as high-quality factor energy storage devices for filter and oscillator applications [1]. Later, they gained status as effective radiators due to the efforts of Long, McAllister, and Chen [2]. Since then, enormous DR antenna (DRA) designs have been explored and different feeding techniques introduced to achieve optimum antenna characteristics like high gain and low quality factor (Q-factor), etc. Compared to microstrip antennas, DRAs offer attractive features such as low loss, high efficiency, and wide impedance bandwidth (BW). Low-profile design and BW enhancement are two important aspects of effective antenna synthesis. Various BW enhancement techniques-like the compact slot DRA [3], aperture feeding, perturbation, cavity-backed disk, ring-shaped DRA, and the stacking of two or more dielectric layers [4]-can be applied on DRAs for this purpose. The stacked DRA, dual-segment, hybrid DRA, and slots in ground-plane approaches were also well suited to improve the impedance BW of DRA [5]-[10]. Various multilayer cylindrical DRA (MCDRA) structures have been proposed and investigated for BW enhancement like the stacked cylinder approach [11], [12], slotted coaxial layered structure [13], etc. More recently, various fractal geometries have been introduced for antenna applications. The main objective of fractal applications is to reduce the size of the antenna for wideband characteristics, while maintaining other design parameters at an acceptable level. Several antenna configurations based on fractal geometries have been previously examined [14].

21 citations