scholarly journals A Novel Ultrawideband Gear-Shaped Dielectric Ring Resonator Antenna

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Mehdi Ghorbani ◽  
Habib Ghorbaninejad
Keyword(s):  
Dielectric Resonator ◽  
Ring Resonator ◽  
Ground Plane ◽  
Array Antenna ◽  
Impedance Bandwidth ◽  
Circular Array ◽  
Dielectric Resonator Antennas ◽  
Resonator Structure ◽  
Quarter Wave ◽  
Design Characteristics

In this study, a novel ultrawideband (UWB) dielectric ring resonator (DRR) antenna has been proposed. DRR antennas include a single monopole antenna in the center of a ground plane and a dielectric with a symmetric structure around the monopole. This structure will lead to ultrawide band antenna. However, it is still possible to enhance the antenna bandwidth. In this study, we combine the DRR structure with an array antenna. The proposed antenna includes a circular array of four triangle resonators, which is rotated around the center of the triangle base to form a gear-shaped ring resonator antenna. In this design, characteristics of all these antennas are combined to enhance the antenna bandwidth including triangular dielectric resonator, circular array antenna, dielectric ring resonator structure, and a quarter-wave electric monopole. Triangular dielectric resonator antennas are wideband and in small size. Ring resonator antennas are inherently ultrawideband. Quarter-wave electric monopole and circular array structure can also enhance antenna bandwidth. This novel shape of the DRR antenna possesses the wider impedance bandwidth compared to similar works. Impedance bandwidth is 150% (5.2–36.1 GHz), and the bandwidth ratio is 1 : 6.9, which is much greater than earlier reports.

Low-profile U-shaped DRA for ultra-wideband applications

2016 ◽  
Vol 9 (3) ◽  
pp. 621-627 ◽  
Author(s):  
Idris Messaoudene ◽  
Tayeb A. Denidni ◽  
Abdelmadjid Benghalia
Keyword(s):  
Dielectric Resonator ◽  
Ground Plane ◽  
Ultra Wideband ◽  
Impedance Bandwidth ◽  
Dielectric Resonator Antenna ◽  
Radiation Patterns ◽  
Wide Bandwidth ◽  
Operating Band ◽  
Low Profile ◽  
Measurement Results

In this paper, a microstrip-fed U-shaped dielectric resonator antenna (DRA) is simulated, designed, and fabricated. This antenna, in its simple configuration, operates from 5.45 to 10.8 GHz. To enhance its impedance bandwidth, the ground plane is first modified, which leads to an extended bandwidth from 4 to 10.8 GHz. Then by inserting a rectangular metallic patch inside the U-shaped DRA, the bandwidth is increased more to achieve an operating band from 2.65 to 10.9 GHz. To validate these results, an experimental antenna prototype is fabricated and measured. The obtained measurement results show that the proposed antenna can provide an ultra-wide bandwidth and a symmetric bidirectional radiation patterns. With these features, the proposed antenna is suitable for ultra-wideband applications.

Resonance breakdown of dielectric resonator antennas on ground plane at visible frequencies

2015 ◽  
Author(s):  
Chengjun Zou ◽  
Withawat Withayachumnankul ◽  
Longfang Zou ◽  
Christophe Fumeaux
Keyword(s):  
Dielectric Resonator ◽  
Ground Plane ◽  
Dielectric Resonator Antennas

scholarly journals A Compact Dielectric Resonator Antenna Excited by a Planar Monopole Patch for Wideband Applications

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
Xuping Li ◽  
Yabing Yang ◽  
Fei Gao ◽  
Hanqing Ma ◽  
Xiaowei Shi
Keyword(s):  
Reflection Coefficient ◽  
Dielectric Resonator ◽  
Ground Plane ◽  
Impedance Bandwidth ◽  
Dielectric Resonator Antenna ◽  
High Radiation ◽  
Ansoft Hfss ◽  
Measurement Results ◽  
Broadside Radiation ◽  
Operation Frequency

A compact dielectric resonator antenna (DRA) suitable for wideband applications is presented in this paper. The proposed antenna is mainly composed by a notched cylindrical dielectric resonator (DR) coated with a metal surface on the top and a finite ground plane where the presented DR is placed. This antenna is very simple in structure and has a very low overall height of0.14λminat its lowest operation frequency. A comprehensive parametric study is carried out based on Ansoft HFSS to optimize the bandwidth. The proposed antenna has been successfully simulated, optimized, fabricated, and measured. The measurement results demonstrate that the proposed design produces an impedance bandwidth of more than 75%, ranging from 2.9 GHz to 6.7 GHz for the reflection coefficient less than −10 dB. In particular, consistent broadside radiation patterns, stable gain, and high radiation efficiency are also obtained within the operation frequency band.

scholarly journals DESIGN AND SIMULATION OF DIELECTRIC RESONATOR ANTENNA (DRA) WITH CO-AXIAL PROBE FOR WIRELESS APPLICATION

2020 ◽  
Vol 5 (2) ◽  
pp. 75-83
Author(s):  
Devansh Sinha ◽  
Mohit Vyas ◽  
Sanjay Singh Kushwah
Keyword(s):  
High Frequency ◽  
Dielectric Resonator ◽  
Return Loss ◽  
Ground Plane ◽  
Impedance Bandwidth ◽  
Dielectric Resonator Antenna ◽  
Frequency Bandwidth ◽  
Rectangular Patch ◽  
Wireless Application ◽  
Potential Parameters

In this paper a Dielectric resonator antenna (DRA) consists of a rectangular geometry and a printed rectangular patch on top of it in order to achieve better performance and operation without significant increase in antenna size. DRA structure is proposed at a height of 2 mm from the ground plane and patch incorporated at the height of 3.638 mm. This work is mainly focused on increasing the potential parameters of DRA and analyze high frequency band. The proposed antenna is designed to resonate at 25 GHz and by varying the DRA size ‘a, then the simulated results shows variation in Return Loss. The impedance bandwidth of the DRA (23.417 GHz-26.961 GHz) and return loss is 26.543951dB.The proposed DRA is analyzed and design using CST-MSW (2010). The simulated result shows the Far field, smith chart. We have estimated the wavelength, frequency, bandwidth, Return loss and directivity.                                      

scholarly journals Dual Notched-Band Crescent Moon Dielectric Resonator Antenna

2021 ◽  
Vol 25 (1) ◽  
pp. 11-19
Author(s):  
Mohamed Debab ◽  
◽  
Amina Bendaoudi ◽  
Zoubir Mahdjoub ◽  
◽  
...  
Keyword(s):  
Frequency Band ◽  
Dielectric Resonator ◽  
Satellite Communication ◽  
Ground Plane ◽  
Ultra Wideband ◽  
Dual Band ◽  
Impedance Bandwidth ◽  
Dielectric Resonator Antenna ◽  
Printed Antenna ◽  
Antenna Structure

In this article, a dual-band notched ultra-wideband (UWB) dielectric resonator antenna is proposed. The antenna structure consists of Crescent Moon Dielectric Resonator (CMDR) fed by a stepped microstrip monopole printed antenna, partial ground plane, and an I-shaped stub. The Crescent Moon dielectric resonator is placed on the microstrip monopole printed antenna to achieve wide impedance bandwidth, and the I-shaped stub is utilized to improve impedance bandwidth for the WiMAX band. A comprehensive parametric study is carried out using HFSS software to achieve the optimum antenna performance and optimize the bandwidth of the proposed antenna. The entire band is useful with two filtered bands at 5.5 GHz and 6.8 GHz by the creation of notches. The band’s rejection, WLAN band (5.2–5.7 GHz), and the downlink frequency band of ITU 7 GHz-band for satellite communication (6.5–7.3 GHz) is realized by inserting G-shaped and C-shaped slots in the ground. The simulation results demonstrate that the proposed CMDR antenna achieves satisfactory UWB performance, with an impedance bandwidth of around 88.7%, covers the frequency band of 3.2 - 8.3 GHz, excluding a rejection band for the WLAN and ITU 7 GHz band. The CMDR is simulated using HFSS and CST high-frequency simulators.

Conformal Bent Dielectric Resonator Antennas With Curving Ground Plane

2019 ◽  
Vol 67 (3) ◽  
pp. 1931-1936 ◽  
Author(s):  
Ma Boyuan ◽  
J. Pan ◽  
Enhao Wang ◽  
Yuyue Luo
Keyword(s):  
Dielectric Resonator ◽  
Ground Plane ◽  
Dielectric Resonator Antennas

scholarly journals Pattern reconfigurable dielectric resonator antenna based on phased array switches

2018 ◽  
Vol 7 (2.29) ◽  
pp. 265
Author(s):  
Aymen Dheyaa Khaleel ◽  
Mohd Fais Mansor ◽  
Norbahiah Misran ◽  
Mohammad Tariqul Islam
Keyword(s):  
Dielectric Resonator ◽  
Ground Plane ◽  
Impedance Bandwidth ◽  
Total Efficiency ◽  
Dielectric Resonator Antenna ◽  
Term Evolution ◽  
Waveguide Model ◽  
Feeding Structure ◽  
Microstrip Feed

This study examines a cuboid dielectric resonator antenna with partial ground plane. The dielectric resonator of the antenna is designed with high permittivity, ɛr=30. The dimension used to design this cuboid dielectric resonator antenna was based on the dielectric waveguide model (DWM). Meanwhile, the feeding structure depends on the microstrip feed line that resides above the FR4 substrate. The significance of this study is to obtain a reconfigurable radiation pattern. Switches were used to operate the two array elements with phased control in order to obtain reconfigurable pattern, by controlling the switches, the results produced three different radiation patterns at 2.6 GHz with total efficiency 88%. Hence, this proposed antenna can be used for Long Term Evolution (LTE) of band 7 and band 38 with an impedance bandwidth of more than 200 MHz. This study was implemented in a CST Microwave Studio. 

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