scholarly journals Dielectric Resonator Antenna Mounted on Cylindrical Ground Plane for Handheld RFID Reader at 5.8 GHz

2012 ◽  
Vol 1 (3) ◽  
pp. 71
Author(s):  
H. A. E. Malhat ◽  
S. Zainud-deen ◽  
N. El-Shalaby ◽  
K. Awadalla
Keyword(s):  
Dielectric Resonator ◽  
Ground Plane ◽  
Axial Ratio ◽  
High Gain ◽  
Human Hand ◽  
Dielectric Resonator Antenna ◽  
Device Model ◽  
Rfid Reader ◽  
Reader Antenna ◽  
Finite Integral

Dielectric resonator antenna (DRA) mounted on cylindrical ground plane is investigated for handheld RFID reader applications at 5.8 GHz. The simplicity of the structure makes it practical in terms of cost, space, and ease of fabrication. The radiation characteristics of the antenna in free space and in the presence of a proposed compact reader device model and human hand are calculated. The antenna is circularly polarized and exhibits peak gain of 7.62 dB at 5.8 GHz with high front to back ratio of 15.5 dB. Using the same reader device model, a sequentially feeding 2×2 DRA array mounted on the same cylindrical ground plane is used for RFID reader antenna at 5.8 GHz. The array introduces high gain of 9.36 dB at 5.8 GHz with high front to back ratio of 10.48 dB. The 2×2 DRA array elements exhibit circular polarization over a frequency band of 1.1 GHz. The axial ratio is 1.1 dB at 5.8 GHz. The proposed reader model is simple and has a small size compared with that in the case of planar ground plane. The results are calculated using the finite element method (FEM) and compared with that calculated using the finite integral technique (FIT).

scholarly journals Single Feed Aperture-Coupled Wideband Dielectric Resonator Antenna with Circular Polarization for Ku-Band Applications

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
Joshua M. Patin ◽  
Satish K. Sharma
Keyword(s):  
Circular Polarization ◽  
Dielectric Resonator ◽  
Ground Plane ◽  
Axial Ratio ◽  
Resonant Mode ◽  
Center Frequency ◽  
Back Side ◽  
Dielectric Resonator Antenna ◽  
Band Frequency ◽  
Ku Band

A novel single feed aperture-coupled wideband dielectric resonator antenna (DRA) exhibiting righ-handed circular polarization (RHCP) operating in the Ku-band frequency range is presented. The aperture-coupled single feed design utilizes back-side microstrip excitation through a novel bow-tie-shaped cross-slots in the ground plane. Extensive simulation parametric studies resulted in a 3 dB axial ratio (AR) bandwidth of 17.24% at a center frequency of 13 GHz, where the dielectric resonator is excited in its HEM11δresonant mode. A prototype DRA was fabricated with some limitations and experimentally verified for the impedance matching and radiation patterns showing circular polarization.

scholarly journals WIDEBAND CIRCULARLY POLARIZED UHF RFID READER ANTENNA WITH HIGH GAIN AND WIDE AXIAL RATIO BEAMWIDTHS

2012 ◽  
Vol 129 ◽  
pp. 365-385 ◽  
Author(s):  
Ping Wang ◽  
Guangjun Wen ◽  
Jian Li ◽  
Yongjun Huang ◽  
Liu Yang ◽  
...  
Keyword(s):  
Axial Ratio ◽  
High Gain ◽  
Uhf Rfid ◽  
Circularly Polarized ◽  
Rfid Reader ◽  
Reader Antenna

scholarly journals Metallic Reflector-Based X-Band Circularly Polarized Hollow Dielectric Resonator Antenna for High Gain in UWB Applications

2021 ◽  
Author(s):  
SACHIN KUMAR YADAV ◽  
Amanpreet Kaur ◽  
Rajesh Khanna
Keyword(s):  
Circular Polarization ◽  
Dielectric Resonator ◽  
Near Field ◽  
Axial Ratio ◽  
High Gain ◽  
Impedance Bandwidth ◽  
Dielectric Resonator Antenna ◽  
Circularly Polarized ◽  
X Band ◽  
Peak Gain

Abstract A circularly polarized hollow dielectric resonator antenna (CPHDRA) is designed for X-band applications. Rectangular dielectric resonator (RDR) is used as a radiator element, fed by a quarter-wave transformer (QWT) feedline. By performance of the RDR antenna, an air cylindrical rod structure is extracted from RDR to enhance the gain and impedance bandwidth. Two parasitic strips are placed on the top of the RDR to achieve circular polarization with reported ≤ 3-dB axial ratio (AR) bandwidth for X-band applications. In this article, UWB antenna covers range from 2.74 to 10.4GHz by using asymmetrical defective ground structure (DGS). In near field of the dielectric resonator, three different radiating modes namely HE11δ, HE21δ, HE23δ, and HE32δ are at 4.4, 6, 8.8, and 9.9 GHz. For the generation of circular polarization (CP), two orthogonal modes are generated at 8.8 and 9.9 GHz as per XZ and YZ planes. It has reported 23.8 % (8 to 10.1 GHz) of 3-dB AR bandwidth. The simulated and measured impedance bandwidths are 118.46 % and 121.12 % along with a peak gain of 6.55 dB without the use of a metallic reflector. By using a metallic reflector suspended in the bottom side of the substrate with a distance of 13.1mm is reported along with the peak gain of 9.8 dBi.

scholarly journals Nano-Dielectric Resonator Antenna Reflectarray/Transmittarray for Terahertz Applications

2015 ◽  
Vol 4 (1) ◽  
pp. 36 ◽  
Author(s):  
H. A. Malhat ◽  
N. A. Eltresy ◽  
S. H. Zainud-Deen ◽  
K. H. Awadalla
Keyword(s):  
Dielectric Resonator ◽  
Ground Plane ◽  
Unit Cell ◽  
Dielectric Resonator Antenna ◽  
Radiation Characteristics ◽  
Cell Dimensions ◽  
Terahertz Applications ◽  
Full Wave Analysis ◽  
Finite Integral ◽  
Unit Cell Dimensions

Nanoantennas have introduced wide bandwidth for fast data communications. The material properties of good conducting metals introduce plasmonic behavior at Terahertz frequencies. The material property of good conducting metals using Drude Lorentz model has been investigated. The radiation characteristics of nano-dielectric resonator antenna (NDRA) reflectarray at 633 nm have been investigated. A parametric study for the nano DRA unit cell dimensions and material has been introduced. A NDR with silver ground plane have been designed and analyzed. A nano-transmitarray unit-cell has been introduced for the analysis. A comparison between the radiation characteristics of 17×17 and 21×21 NDRA transmitarray has been given. A compromise between the nano-transmitarray size, maximum gain, and operating bandwidth is applied to Terahertz applications. The finite integral technique is used to carry a full wave analysis to design a NDRA reflectarray and a NDRA transmitarray.

A wideband dielectric resonator antenna with switchable diversity patterns

2019 ◽  
Vol 12 (4) ◽  
pp. 339-344
Author(s):  
Ahmad Abdalrazik ◽  
Adel B. Abdel-Rahman ◽  
Ahmed Allam ◽  
Mohammed Abo-Zahhad
Keyword(s):  
Dielectric Resonator ◽  
Ground Plane ◽  
High Gain ◽  
Center Frequency ◽  
Dielectric Resonator Antenna ◽  
Copper Sheet ◽  
Pin Diodes ◽  
Antenna Structure ◽  
Diversity Patterns ◽  
Original Size

AbstractIn this paper, a reduced-size dielectric resonator antenna with switchable diversity patterns is proposed. Ring- and linear-shaped slots are etched in the ground plane of the antenna so as to generate two modes $TE_{\delta 11}^x$ and $TE_{\delta 12}^x$ at a center frequency of 19 GHz. Moreover, two groups of PIN diodes are integrated into these slots to short one group of slots, and let the other group generates the required mode. Thus, the antenna is able to generate two switchable patterns with an envelope correlation coefficient of 0.4. Furthermore, the antenna size is reduced to half of its original size by placing a copper sheet over certain plane of the antenna structure. The antenna achieves wide bandwidths of 17.6–20.9 GHz (17.1$\percnt $) and 18.3–21.6 GHz (13.8$\percnt $) in cases of exciting $TE_{\delta 11}^x$ and $TE_{\delta 12}^x$ modes, respectively. The antenna also attainsa high gain of 7.1 and 3.2 dB at the center frequency.

scholarly journals A New Wideband Circularly Polarized Dielectric Resonator Antenna Loaded with Strips

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Lichao Hao ◽  
Hao Wang ◽  
Bo Li ◽  
Wenting Yin
Keyword(s):  
Dielectric Resonator ◽  
Microstrip Line ◽  
Impedance Matching ◽  
Ground Plane ◽  
Axial Ratio ◽  
Electromagnetic Energy ◽  
Dielectric Resonator Antenna ◽  
Circularly Polarized ◽  
Resonant Point

This paper proposes a novel wideband circularly polarized (CP) dielectric resonator antenna (DRA) loaded with strips. The CP DRA comprises a circular DR, two pairs of driven L-like DR strips with different lengths, and a square ground-plane. To couple the electromagnetic energy to circular DR, an orthogonal cross-slot is used, and a stepped microstrip-line is also used to adjust the impedance matching. Influenced by the concept of deformed DR, two pairs of L-like DR strips of different lengths are inserted into the circular DR as part of the driven element to excite a new axial ratio (AR) resonant point. An antenna prototype is simulated, manufactured, and measured to validate the unique design. The measured results show that the designed antenna has broadband characteristic with a −10 dB IBW of 54% (1.91–3.32 GHz) and 3 dB ARBW of 42.1% (2.10–3.22 GHz).

scholarly journals Beam Scanning UHF RFID Reader Antenna With High Gain and Wide Axial Ratio Beamwidth

2020 ◽  
Vol 4 (4) ◽  
pp. 468-475 ◽  
Author(s):  
Rui Chen ◽  
Shuai Yang ◽  
Ajeck M. Ndifon ◽  
Ian H. White ◽  
Richard V. Penty ◽  
...  
Keyword(s):  
Axial Ratio ◽  
High Gain ◽  
Uhf Rfid ◽  
Beam Scanning ◽  
Rfid Reader ◽  
Reader Antenna

scholarly journals Circular Patch Fed Rectangular Dielectric Resonator Antenna with High Gain and High Efficiency for Millimeter Wave 5G Small Cell Applications

Sensors ◽  
2021 ◽  
Vol 21 (8) ◽  
pp. 2694
Author(s):  
Abinash Gaya ◽  
Mohd Haizal Jamaluddin ◽  
Irfan Ali ◽  
Ayman A. Althuwayb
Keyword(s):  
Millimeter Wave ◽  
Dielectric Resonator ◽  
High Efficiency ◽  
Ground Plane ◽  
High Gain ◽  
Impedance Match ◽  
Dielectric Resonator Antenna ◽  
Rectangular Slot ◽  
Circular Patch ◽  
Slot Aperture

A novel method of feeding a dielectric resonator using a metallic circular patch antenna at millimeter wave frequency band is proposed here. A ceramic material based rectangular dielectric resonator antenna with permittivity 10 is placed over a rogers RT-Duroid based substrate with permittivity 2.2 and fed by a metallic circular patch via a cross slot aperture on the ground plane. The evolution study and analysis has been done using a rectangular slot and a cross slot aperture. The cross-slot aperture has enhanced the gain of the single element non-metallic dielectric resonator antenna from 6.38 dB from 8.04 dB. The Dielectric Resonator antenna (DRA) which is designed here has achieved gain of 8.04 dB with bandwidth 1.12 GHz (24.82–25.94 GHz) and radiation efficiency of 96% centered at 26 GHz as resonating frequency. The cross-slot which is done on the ground plane enhances the coupling to the Dielectric Resonator Antenna and achieves maximum power radiation along the broadside direction. The slot dimensions are further optimized to achieve the desired impedance match and is also compared with that of a single rectangular slot. The designed antenna can be used for the higher frequency bands of 5G from 24.25 GHz to 27.5 GHz. The mode excited here is characteristics mode of TE1Y1. The antenna designed here can be used for indoor small cell applications at millimeter wave frequency band of 5G. High gain and high efficiency make the DRA designed here more suitable for 5G indoor small cells. The results of return loss, input impedance match, gain, radiation pattern, and efficiency are shown in this paper.

Cylindrical Dielectric Resonator Antenna over Soft Ground Plane

2007 ◽  
Vol 17 (1) ◽  
pp. 1-30
Author(s):  
S.H. Zainud-Deen ◽  
E. El-Deen ◽  
H.A. Sharshar ◽  
M. A. Binyamin
Keyword(s):  
Dielectric Resonator ◽  
Ground Plane ◽  
Soft Ground ◽  
Dielectric Resonator Antenna
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