scholarly journals Design of Dielectric Resonator Antenna Using Dielectric Paste

Sensors ◽  
2021 ◽  
Vol 21 (12) ◽  
pp. 4058
Author(s):  
Hauke Ingolf Kremer ◽  
Kwok Wa Leung ◽  
Wai Cheung Wong ◽  
Kenneth Kam-Wing Lo ◽  
Mike W. K. Lee
Keyword(s):  
Dielectric Constant ◽  
Silicone Rubber ◽  
Dielectric Resonator ◽  
Axial Ratio ◽  
Impedance Bandwidth ◽  
Dielectric Resonator Antenna ◽  
Alternative Approach ◽  
3D Printed ◽  
Powder Content ◽  
Broadside Radiation

In this publication, the use of a dielectric paste for dielectric resonator antenna (DRA) design is investigated. The dielectric paste can serve as an alternative approach of manufacturing a dielectric resonator antenna by subsequently filling a mold with the dielectric paste. The dielectric paste is obtained by mixing nanoparticle sized barium strontium titanate (BST) powder with a silicone rubber. The dielectric constant of the paste can be adjusted by varying the BST powder content with respect to the silicone rubber content. The tuning range of the dielectric constant of the paste was found to be from 3.67 to 18.45 with the loss tangent of the mixture being smaller than 0.044. To demonstrate the idea of the dielectric paste approach, a circularly polarized DRA with wide bandwidth, which is based on a fractal geometry, is designed. The antenna is realized by filling a 3D-printed mold with the dielectric paste material, and the prototype was found to have an axial ratio bandwidth of 16.7% with an impedance bandwidth of 21.6% with stable broadside radiation.

Compact and Circularly Polarized Hemispherical DRA for C-Band Applications

Frequenz ◽  
2019 ◽  
Vol 73 (7-8) ◽  
pp. 227-234 ◽  
Author(s):  
Shabya Gupta ◽  
Vinay Killamsetty ◽  
Monika Chauhan ◽  
Biswajeet Mukherjee
Keyword(s):  
Dielectric Constant ◽  
Fractal Geometry ◽  
Dielectric Resonator ◽  
Close Agreement ◽  
Axial Ratio ◽  
Dissipation Factor ◽  
Impedance Bandwidth ◽  
Dielectric Resonator Antenna ◽  
Circularly Polarized ◽  
Tan Δ

Abstract A novel circular polarized Hemispherical Dielectric Resonator Antenna (HDRA) has been proposed in this paper. The Circular Polarization (CP) and enhanced gain characteristics of the antenna are attributed to the fractal geometry applied on the HDRA. Probe coupling is used to excite the proposed antenna which resonates at 4.16 GHz and offers an impedance bandwidth of 2.6 GHz (57 %), from 3.3 to 5.9 GHz. The gain and efficiency of the antenna are 6.38 dBi and 93 % respectively at 4.16 GHz. The Proposed DRA is designed using FR-4 material having a dielectric constant (εr ) of 4.3 and dissipation factor (tan δ) of 0.025. The designed Antenna is experimentally verified and offers a close agreement between simulated and measured results. This Antenna offers a 3-dB Axial Ratio (AR) bandwidth of 1.1 GHz from 4.2 to 5.3 GHz.

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 A Single-Point-Fed Wideband Circularly Polarized Rectangular Dielectric Resonator Antenna

2016 ◽  
Vol 2016 ◽  
pp. 1-9
Author(s):  
Deqiang Yang ◽  
Meng Zou ◽  
Jin Pan
Keyword(s):  
Dielectric Resonator ◽  
Single Point ◽  
Axial Ratio ◽  
Design Concept ◽  
Impedance Bandwidth ◽  
Dielectric Resonator Antenna ◽  
Circularly Polarized ◽  
Measured Impedance ◽  
Rectangular Dielectric Resonator Antenna ◽  
Good Agreement

A single-point-fed circularly polarized (CP) rectangular dielectric resonator antenna (DRA) with wide CP bandwidth is presented. By usingTE111andTE113modes of the rectangular DRA, a wideband CP performance is achieved. The coupling slot of the antenna contains a resistor loaded monofilar-spiral-slot and four linear slots. Design concept of the proposed antenna is demonstrated by simulations, and parameter studies are carried out. Prototype of the proposed antenna was fabricated and measured. Good agreement between the simulation and measurement is obtained. The measured impedance bandwidth (|S11|<-10 dB) and 3 dB axial-ratio (AR) bandwidth are 51.4% (1.91–3.23 GHz) and 33.0% (2.15–3.00 GHz), respectively.

scholarly journals A Broadband Differential-Fed Dual-Polarized Hollow Cylindrical Dielectric Resonator Antenna for 5G Communications

Sensors ◽  
2020 ◽  
Vol 20 (22) ◽  
pp. 6448
Author(s):  
Xiaosheng Fang ◽  
Kangping Shi ◽  
Yuxiang Sun
Keyword(s):  
Dielectric Resonator ◽  
Impedance Bandwidth ◽  
Antenna Gain ◽  
Dielectric Resonator Antenna ◽  
Radiation Patterns ◽  
Higher Order Modes ◽  
Dual Polarized ◽  
Broadside Radiation ◽  
K9 Glass ◽  
Better Than

A broadband differential-fed dual-polarized hollow cylindrical dielectric resonator antenna (DRA) is proposed in this article. It makes use of the HEM111, HEM113, and HEM115 modes of the cylindrical hollow DRA. The proposed DRA is simply fed by two pairs of conducting strips and each pair of strips is provided with the out-of-phase signals. After introducing four disconnected air holes into the DRA, a broadband characteristic is achieved, with little effect on the antenna gain of its higher-order modes. To verify this idea, frosted K9-glass is applied to fabricate the hollow cylindrical DRA. The differential S-parameters, radiation patterns, and antenna gain of the DRA are studied. It is found that the proposed differential-fed dual-polarized DRA is able to provide a broad differential impedance bandwidth of ~68% and a high differential-port isolation better than ~46 dB. Moreover, symmetrical broadside radiation patterns are observed across the whole operating band. The proposed DRA covers the frequency bands including the 5G-n77 (3.4–4.2 GHz), 5G-n79 (4.4–5.0 GHz), WLAN-5.2 GHz (5.15–5.35 GHz), and WLAN-5.8 GHz (5.725–5.825 GHz), which can be used for 5G communications.

scholarly journals Novel Wideband Circularly Polarized DRA With Squint-free Radiation Characteristics

2020 ◽  
Author(s):  
Mohammad Abedian ◽  
Mohsen Khalily ◽  
Vikrant Singh ◽  
Pei Xiao ◽  
Rahim Tafazolli ◽  
...  
Keyword(s):  
Dielectric Resonator ◽  
Vertical Section ◽  
Axial Ratio ◽  
Impedance Bandwidth ◽  
Dielectric Resonator Antenna ◽  
Radiation Characteristics ◽  
Horizontal Section ◽  
Circularly Polarized ◽  
Metal Element ◽  
Coaxial Probe

Abstract A new single-fed circularly polarized dielectric resonator antenna (CP-DRA) without beam squint is presented. The DRA comprises of an S-shaped dielectric resonator (SDR) with a metalized edge and two rectangular dielectric resonator (RDRs) blocks. A horizontal-section is applied as an extension of the SDR, and a vertical-section is placed in parallel to the metallic edge. A vertical coaxial probe is used to excite the SDR and the vertical RDR blocks through an S-shaped metal element and a small rectangular metal strip, respectively. The two added RDRs that form an L-shaped DR improve the radiation characteristics and compensate for the beam squint errors. A wideband CP performance is achieved due to the excitation of several orthogonal modes such as TEx d11, TEy 1d1, TEz 121, TEy 112, TEx 131, and TEy 311. The experimental results demonstrate an impedance bandwidth of approximately 66:8% (3:71-7:45 GHz) and a 3-dB axial-ratio (AR) bandwidth of about 54:8% (3:72-6:53 GHz) with a stable broadside beam achieving a measured peak gain of about 4:64dBi. Furthermore, a 100% correction in beam squint value from q = 41° to q = 0° with respect to the antenna boresight is achieved.

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.

Axial ratio bandwidth enhancement of a circularly polarized rectangular dielectric resonator antenna

2018 ◽  
Vol 10 (8) ◽  
pp. 984-990 ◽  
Author(s):  
Gaurav Varshney ◽  
V. S. Pandey ◽  
R. S. Yaduvanshi
Keyword(s):  
Dielectric Resonator ◽  
Axial Ratio ◽  
New Technique ◽  
Impedance Bandwidth ◽  
Dielectric Resonator Antenna ◽  
Bandwidth Enhancement ◽  
Circularly Polarized ◽  
Conductive Coating ◽  
A New Technique ◽  
Rectangular Dielectric Resonator Antenna

AbstractThis paper presents a new technique for the enhancement of axial ratio (AR) bandwidth of a circularly polarized dielectric resonator antenna with a single feeding. To enhance the AR bandwidth, adjacent 3-dB AR passbands are merged by inserting the notches and conductive coating in the dielectric resonator. The dimensions of the notches and conductive coating are selected in such manner that impedance bandwidth remains approximately unchanged. The antenna provides the measured AR and impedance bandwidths of 55.22% and 66.45%, respectively.

scholarly journals Novel wideband circularly polarized DRA with squint-free radiation characteristics

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Mohammad Abedian ◽  
Mohsen Khalily ◽  
Vikrant Singh ◽  
Pei Xiao ◽  
Rahim Tafazolli ◽  
...  
Keyword(s):  
Dielectric Resonator ◽  
Vertical Section ◽  
Axial Ratio ◽  
Dielectric Resonators ◽  
Impedance Bandwidth ◽  
Dielectric Resonator Antenna ◽  
Radiation Characteristics ◽  
Circularly Polarized ◽  
Metal Element ◽  
Coaxial Probe

AbstractA new single-fed circularly polarized dielectric resonator antenna (CP-DRA) without beam squint is presented. The DRA comprises an S-shaped dielectric resonator (SDR) with a metalized edge and two rectangular dielectric resonators (RDRs) blocks. Horizontal extension section is applied as an extension of the SDR, and a vertical-section is placed in parallel to the metallic edge. A vertical coaxial probe is used to excite the SDR and the vertical RDR blocks through an S-shaped metal element and a small rectangular metal strip. The two added RDRs that form an L-shaped DR improve the radiation characteristics and compensate for the beam squint errors. A wideband CP performance is achieved due to the excitation of several orthogonal modes such as $$TE_{\delta 11}^x$$ T E δ 11 x , $$TE_{1\delta 1}^y$$ T E 1 δ 1 y , $$TE_{121}^z$$ T E 121 z , $$TE_{112}^y$$ T E 112 y , $$TE_{131}^x$$ T E 131 x , and $$TE_{311}^y$$ T E 311 y . The experimental results demonstrate an impedance bandwidth of approximately $$66.8\%$$ 66.8 % (3.71–7.45 GHz) and a 3-dB axial-ratio (AR) bandwidth of about $$54.8\%$$ 54.8 % (3.72–6.53 GHz) with a stable broadside beam achieving a measured peak gain of about $$4.64 \, {\text{dBic}}$$ 4.64 dBic . Furthermore, a 100% correction in beam squint value from $$\theta = 41^\circ$$ θ = 41 ∘ to $$\theta = 0^\circ$$ θ = 0 ∘ with respect to the antenna boresight is achieved.

scholarly journals Wideband tetraskelion dielectric resonator antenna

2020 ◽  
Vol 19 (2) ◽  
pp. 879
Author(s):  
Irfan Ali ◽  
Mohd Haizal Jamaluddin ◽  
Abinash Gaya
Keyword(s):  
Dielectric Constant ◽  
Dielectric Resonator ◽  
Relative Dielectric Constant ◽  
High Gain ◽  
Impedance Bandwidth ◽  
Dielectric Resonator Antenna ◽  
Simulation And Optimization ◽  
Fifth Generation ◽  
Low Profile ◽  
Slot Coupling

In this paper, a wideband tetraskelion dielectric resonator antenna with a low profile and high gain for the upcoming fifth generation (5G) communication applications is presented. The proposed DR antenna has been designed at the operating frequency of 26 GHz. The designed antenna is etched on Rogers RT/Duroid 5880 substrate of dielectric constant =2.2, with a thickness of 0.254mm. The DR material having a relative dielectric constant ( ) of 10 is used for a proposed design. The antenna was fed by using a 50-ohm microstrip line with slot coupling. The simulation and optimization have been performed by using the commercial software CST Microwave studio. The proposed structure exhibits a wide impedance bandwidth of 19.6% for |S11|&lt; -10 dB from 24.5 to 29.6 GHz and peak gain of 9 dBi with the efficiency of 95% for complete bandwidth. The results show that an antenna is low profile and can be used for 5G wireless communication Applications.

Design of Rectangular Dielectric Resonator Antenna for Mobile Wireless Application

2021 ◽  
Vol 36 (5) ◽  
pp. 568-576
Author(s):  
Chaitanya Bethala ◽  
Manjunatha Kamsali
Keyword(s):  
Dielectric Resonator ◽  
Impedance Bandwidth ◽  
Potential Candidate ◽  
Dielectric Resonator Antenna ◽  
Defected Ground Structure ◽  
Mobile Wireless ◽  
Radiating Element ◽  
Wireless Application ◽  
Good Improvement ◽  
Broadside Radiation

In this article, a pentaband rectangular DRA is explored and presented. The proposed antenna has a crescent-shaped radiating element with defected ground structure and it is feed by 50‐Ω microstrip line. The RDRA invariably has two similar dielectric resonators made up of RT5870 is positioned on top of the crescent-shaped patch. With the use of a dielectric resonator, the proposed structure has good improvement in impedance bandwidth and gain. The proposed rectangular DRA has penta operating frequency bands with resonant frequency at 1.49 GHz, 2.00 GHz, 2.50 GHz, 5.49 GHz, and 7.75 GHz. The projected structure exhibits the broadside radiation pattern with the maximum gain and directivity of 4 dBi and 4.5 dBi, respectively. The gig of the projected RDRA is validated with the help of simulated results by CST software. The observed results of the proposed antenna indicate that it can be a potential candidate for GPS, PCS, UMTS, ISM, WLAN, Wi-MAX applications.

Sign in / Sign up

Export Citation Format

Share Document