scholarly journals A Compact Wide-Band Hybrid Dielectric Resonator Antenna with Enhanced Gain and Low Cross-Polarization

2017 ◽  
Vol 2017 ◽  
pp. 1-8 ◽  
Author(s):  
Feibiao Dong ◽  
Limei Xu ◽  
Wenbin Lin ◽  
Tianhong Zhang
Keyword(s):  
Frequency Band ◽  
Dielectric Resonator ◽  
Return Loss ◽  
Wide Band ◽  
High Gain ◽  
Hybrid Design ◽  
Cross Polarization ◽  
Dielectric Resonator Antenna ◽  
Small Base ◽  
Air Layers

By loading two printed patches to the dielectric resonator antenna (DRA), a compact wide-band hybrid dielectric resonator antenna with enhanced gain and low cross-polarization is presented. The proposed antenna utilizes a combination of a rectangular dielectric resonator and two printed patches. Due to the hybrid design, multiple resonances were obtained. By adding two air layers between the dielectric resonator and the printed patches, the bandwidth has been significantly improved. Compared to the traditional hybrid dielectric resonator antenna, the proposed antenna can achieve wide bandwidth, high gain, low cross-polarization, and even small size simultaneously. The prototype of the proposed antenna has been fabricated and tested. The measured −10 dB return loss bandwidth is 25.6% (1.7–2.2 GHz). The measured antenna gains are about 6.3 and 8.2 dBi in the operating frequency band. Low cross-polarization levels of less than −28.5 dB and −43 dB in the E-plane and H-plane are achieved. Moreover, the overall dimensions of the antenna are only 67 × 67 × 34 (mm3). The proposed antenna is especially attractive for small base antenna applications.

scholarly journals Wideband Cylindrical Dielectric Resonator Antenna Operating in HEM11δ Mode with Improved Gain: A Study of Superstrate and Reflector Plane

2017 ◽  
Vol 2017 ◽  
pp. 1-11 ◽  
Author(s):  
Sounik Kiran Kumar Dash ◽  
Taimoor Khan ◽  
Binod Kumar Kanaujia ◽  
N. Nasimuddin
Keyword(s):  
Dielectric Resonator ◽  
Impedance Matching ◽  
Wide Band ◽  
High Gain ◽  
Dielectric Resonator Antenna ◽  
Gain Enhancement ◽  
Transparent Dielectric ◽  
Single Side ◽  
X Band ◽  
First Time

A wideband and high gain dielectric resonator antenna (DRA) operating in hybrid HEM11δ mode is proposed. The investigated geometry employs one cylindrical dielectric resonator partially covered with a transparent dielectric superstrate and backed up by a single side metal coated dielectric reflector plane. The reflector is dedicated for gain enhancement while the superstrate is employed for merging of two resonant bands resulting in a single wide band. The dielectric resonator is excited by simple microstrip feed slot coupling technique and operates over X-band, ranging from 7.12 GHz to 8.29 GHz, that is, of 15.18% impedance matching bandwidth with 11.34 dBi peak gain. The different development stages like standalone DRA, DRA with superstrate, DRA with reflector, and DRA with both superstrate and reflector plane with respect to bandwidth and gain performances are analyzed properly. To the best of authors’ knowledge, this is the first time this type of combination of both superstrate and reflector plane is demonstrated in DRA engineering. An antenna prototype was fabricated and characterized and a very good agreement is achieved between the simulated and measured results.

scholarly journals Design and Simulation of Slot Dimensions in Aperture Coupled Hemispherical Dielectric Resonator Antenna

2019 ◽  
Vol 9 (2S3) ◽  
pp. 244-247
Keyword(s):  
Dielectric Constant ◽  
Resonant Frequency ◽  
Dielectric Resonator ◽  
Return Loss ◽  
High Gain ◽  
Slot Width ◽  
Dielectric Resonator Antenna ◽  
Slot Length ◽  
Directive Gain

Aperture coupled novel shaped Hemispherical Dielectric Resonator Antenna (HDRA ) and the various dimensions of slots are designed and analyzed by hfss software. The dielectric constant of dielectric hemisphere is € =9.8 and the substrate of dielectric constant is 2.96. aperture coupled novel shaped Hemispherical Dielectric Resonator Antenna (HDRA ) parameters are presented in this paper.. The effects of changing the slot length , slot width and position of slot on the antenna parameters and are presented in this paper, which are used for directive gain applications. As the change of slot dimension , it is observed that at the resonant frequency, it gives high gain and high negative return loss

scholarly journals Design of High Gain and Broadband Antennas at 60 GHz for Underground Communications Systems

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
Yacouba Coulibaly ◽  
Mourad Nedil ◽  
Larbi Talbi ◽  
Tayeb A. Denidni
Keyword(s):  
Frequency Band ◽  
Dielectric Resonator ◽  
Communication Systems ◽  
High Gain ◽  
Simulation Software ◽  
60 Ghz ◽  
Dielectric Resonator Antenna ◽  
Underground Communication ◽  
Underground Communications ◽  
Good Agreement

A new broadband and high gain dielectric resonator antenna for millimeter wave is presented. The investigated antenna configuration consists of a periodic square ring frequency selective surfaces on a superstrate, an aperture-coupled scheme feed, an intermediate substrate, and a cylindrical dielectric resonator. This antenna is designed to cover the ISM frequency band at 60 GHz (57 GHz–64 GHz). It was numerically designed using CST microwave Studio simulation software package. Another prototype with a plain dielectric superstrate is also studied for comparison purposes. A bandwidth of 13.56% at the centered frequency of 61.34 GHz and a gain of 11 dB over the entire ISM band have been achieved. A maximum gain of 14.26 dB is obtained at 60 GHz. This is an enhancement of 9 dB compared to a single DRA. HFSS is used to validate our antenna designs. Good agreement between the results of the two softwares is obtained. With these performances, these antennas promise to be useful in the design of future wireless underground communication systems operating in the unlicensed 60 GHz frequency band.

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

Frequenz ◽  
2019 ◽  
Vol 73 (3-4) ◽  
pp. 109-116
Author(s):  
Nipun K. Mishra ◽  
Soma Das ◽  
Dinesh K. Vishwakarma
Keyword(s):  
Dielectric Resonator ◽  
Satellite Communication ◽  
Dielectric Material ◽  
Wide Band ◽  
High Gain ◽  
Impedance Bandwidth ◽  
Dielectric Resonator Antenna ◽  
X Band ◽  
Feed Network ◽  
High Dielectric

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.

Pattern Reconfigurable High Gain Spherical Dielectric Resonator Antenna Operating on Higher Order Mode

2019 ◽  
Vol 18 (1) ◽  
pp. 128-132 ◽  
Author(s):  
Byung Kuon Ahn ◽  
Hye-Won Jo ◽  
Jong-Sang Yoo ◽  
Jong-Won Yu ◽  
Han Lim Lee
Keyword(s):  
Dielectric Resonator ◽  
High Gain ◽  
Higher Order ◽  
Dielectric Resonator Antenna ◽  
Order Mode ◽  
Higher Order Mode
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