Wideband High Gain Cylindrical Dielectric Resonator Antenna for X-Band Applications

Abstract

In present work a wide band and high gain cylindrical dielectric resonator antenna working in X-band has been designed and validated experimentally. First the bandwidth of the antenna has been enhanced by placing the thin dielectric layer between antenna and feed network. Next gain of the antenna has been increased by placing a layer of high dielectric material at nearly λ/2 distance as superstrate. The proposed design with impedance bandwidth of 3 GHz and gain nearly 11dBi could be used in satellite communication and other wideband wireless applications operating in X-band.

Synthesizing Radiation Properties of Dual-band Dual-mode High Gain Dielectric Resonator Antenna for Wireless Applications

“…This method is not suitable for all applications due to the limitation of the compact installation platform. Therefore to solve these issues, varieties of gain enhancement techniques, such as the use of electromagnetic bandgap (EBG) structure [17], metallic cap [18], different feeding mechanisms [19], stacked configured of different layers [20], frequency selective surfaces (FSS) [21], and superstrate layer [22][23][24][25][26], are developed by researchers. In most of the reported articles, it is observed that the gain enhancement at the lower frequencies by maintaining the miniaturized dimension becomes a challenging task.…”

“…The use of a dual-band FSS with bandpass response as a superstrate above the DRA is one of the reported techniques for gain improvement in both the operating bands [21]. Dual-band characteristics in superstrate loaded cylindrical DRA are reported with enhanced gain performance [22], whereas by placing a thin dielectric material as intermediate layer between antenna and feed network along with dielectric material as superstrate at top of radiator [23], the combination of superstrate with reflector [24] can be used to design a wideband DRA with improved gain characteristics. Though all these techniques [17][18][19][20] are very effective for the gain improvement of the traditional DRA, sometimes dealing with different challenging issues like stacking of different layers, precision fabrication, etc., improper arrangements or modifications in the DRA structure may lead to affecting the quality factor.…”

“…Though all these techniques [17][18][19][20] are very effective for the gain improvement of the traditional DRA, sometimes dealing with different challenging issues like stacking of different layers, precision fabrication, etc., improper arrangements or modifications in the DRA structure may lead to affecting the quality factor. The techniques summarized in [21][22][23][24] improve the radiation characteristics without much affecting the other performances, but investigation on these techniques is limited, which needs to be extended further.…”

Sıfıra Yakın İndeksli Ayrık Halka Resonatörü: Lens Anten

“…Smith et al (Smith and Croll, 2000;Smith et al, 2004) first produced the materials which could be designed with the desired electromagnetic properties. These structures are used in many application areas such as cloaking (Cai et al, 2007;Schuring, 2006), sensing (Altıntaş et al, 2019;Talai et al, 2017), antennas (Abdalla, 2017;Hamad, 2019;Kawdungta, 2017;Fu et al, 2016;Salamin et al, 2020;Mark, et al, 2020;Mishra et al, 2019), energy harvesting (Zeng et al, 2019;Wang et al, 2015;Haque et al, 2015), and super lens (Khoomwong and Phongcharoenpanich, 2017;Li et al, 2016;Orazbayev et al, 2015;Pen et al, 2019). Several studies concerning metamaterials have been performed in microwave frequencies, THz frequencies (Abbas et al, 2020), infrared and optical ranges.…”

“…In recent years, metamaterials, artificial materials not found in nature, have been the subject of attention for most researchers. The idea of negative values of permittivity , permeability and refractive index n put forward by Veselago (Veselago, 1968) was first theoretically proved by Pendry (Pendry et al, 1999). Smith et al (Smith and Croll, 2000;Smith et al, 2004) first produced the materials which could be designed with the desired electromagnetic properties.…”