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.

A Coplanar Waveguide Rectangular Dielectric Resonator Antenna (RDRA) for 4G Applications

2015 ◽  
Vol 73 (1) ◽  
Author(s):  
Muhammad Ramlee Kamarudin ◽  
Siti Fairuz Roslan ◽  
Mohsen Khalily ◽  
Mohd Haizal Jamaluddin
Keyword(s):  
Dielectric Resonator ◽  
Coplanar Waveguide ◽  
Impedance Bandwidth ◽  
Dielectric Resonator Antenna ◽  
Measurement Results ◽  
Metallic Strip ◽  
Measured Impedance ◽  
Rectangular Dielectric Resonator Antenna ◽  
Good Agreement

This paper presents the design of coplanar waveguide (CPW) rectangular dielectric resonator antenna (RDRA) with and without metallic strip, operating at 2.6 GHz for long term evolution (LTE) applications. The CPW RDRA without metallic strip produces impedance bandwidth of 51 %. Then, a metallic strip was added on top of the dielectric resonator (DR) in order to enhance the impedance bandwidth; thus give more flexibility for the system to cover more applications. A good agreement between simulation and measurement results, in terms of reflection coefficient magnitude and radiation pattern is presented. The simulated and measured impedance BWs for S11 < -6dB are 67 % (1.74-3.47 GHz) and 66 % (1.83-3.54 GHZ) respectively, with the gain of 3.12 dBi is obtained at 2.6 GHz.  The mode excited for this antenna is TEy1δ1 mode.

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.

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 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.

DUAL BAND RECTANGULAR DIELECTRIC RESONATOR ANTENNA FOR WLAN APPLICATION

2016 ◽  
Vol 78 (6-2) ◽  
Author(s):  
Raghuraman Selvaraju ◽  
M. R. Kamarudin ◽  
Mohsen Khalily ◽  
Jamal Nasir ◽  
M. H. Jamaluddin.
Keyword(s):  
Dielectric Resonator ◽  
Dual Band ◽  
Impedance Bandwidth ◽  
Strip Line ◽  
Dielectric Resonator Antenna ◽  
Ring Shape ◽  
Measured Impedance ◽  
Band Ring ◽  
5 Ghz ◽  
Rectangular Dielectric Resonator Antenna

A compact dual band ring shape rectangular dielectric resonator antenna (RRDRA) to operate at 2.4 GHz and 5 GHZ WLAN application is proposed. In this design the dielectric resonator is fed by modified 50Ω trapezoidal micro strip line situated on top of the FR4 substrate. The simulated and measured impedance bandwidth achieved at 2.4 GHZ is 12.42% (2.3149-2.6132) and 12.9% (2.21-2.52) respectively; whilst for 5 GHZ at 13% (5.1795-5.8914) and 13.2% (5.08-5.81) for S11<-10 dB. And the gain of the proposed antenna is 4.9dBi and 5.9 dBi at 2.4 GHz 5GHZ respectively. Results are simulated using Ansoft High frequency structural simulator (HFSS) for the study of impedance bandwidth, return loss, radiation pattern and antenna gain. Furthermore the antenna has been fabricated and tested. The measured characteristics of the proposed antenna are in good agreement with the simulated results. 

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.

A novel design of circularly polarized ring CDRA with wideband impedance bandwidth using slotted microstrip feed line for X-band applications

2021 ◽  
pp. 1-10
Author(s):  
Chandravilash Rai ◽  
Sanjai Singh ◽  
Ashutosh Kumar Singh ◽  
Ramesh Kumar Verma
Keyword(s):  
Axial Ratio ◽  
Impedance Bandwidth ◽  
Dielectric Resonator Antenna ◽  
Circularly Polarized ◽  
Feed Line ◽  
X Band ◽  
Novel Design ◽  
Two Hybrid ◽  
Microstrip Feed Line ◽  
Microstrip Feed

Abstract A circularly polarized ring cylindrical dielectric resonator antenna (ring-CDRA) of wideband impedance bandwidth is presented in this article. The proposed ring CDRA consist of an inverted rectangular (tilted rectangular) shaped aperture and inverted L-shaped slotted microstrip feed line. The tilted rectangular shaped aperture and inverted L-shaped microstrip feed line generate two-hybrid mode HEM11δ and HEM12δ while ring CDRA and slotted microstrip feed line are used for the enhancement of impedance bandwidth. The proposed ring CDRA is resonating between 6.08 and 12.2 GHz with 66.95% (6120 MHz) impedance bandwidth. The axial ratio (AR) bandwidth of 6.99% (780 MHz) is obtained between 10.76 and 11.54 GHz with a minimum AR value of 0.2 dB at a frequency of 11 GHz. The proposed geometry of ring CDRA has been validated with measurement performed by VNA and anechoic chamber. The operating range of the proposed radiator is useful for different applications in X-band.

scholarly journals Circularly polarized rectangular dielectric resonator antenna excited by an off-set conformal metal strip

2019 ◽  
Vol 15 (2) ◽  
pp. 902 ◽  
Author(s):  
U. Illahi ◽  
J. Iqbal ◽  
M. I. Sulaiman ◽  
M Alam ◽  
M. S. Mazliham ◽  
...  
Keyword(s):  
Dielectric Resonator ◽  
Impedance Matching ◽  
Metal Strip ◽  
Antenna Design ◽  
Far Field ◽  
Dielectric Resonator Antenna ◽  
Simulation Techniques ◽  
Resonant Modes ◽  
Rectangular Dielectric Resonator Antenna ◽  
Good Agreement

<p class="Abstract">A rectangular dielectric resonator antenna (DRA) has been excited by an off-set single conformal metal strip. By using such excitation technique two degenerate resonant modes, TExδ11 and TEy1δ1 of the rectangular DRA have been excited to achieve circular polarization (CP). A CP bandwidth of ~ 5.2% in conjunction with a wide impedance matching bandwidth of ~ 54% has been provided by the proposed DRA configuration. The antenna design has been simulated using computer simulation technology (CST). Antenna prototype has been built to verify the impedance matching bandwidth. Far field parameters have been optimized and verified using two simulation techniques in CST i.e. finite integration technique (FIT) and finite element method (FEM). A good agreement between the simulated and measured result has been observed for S11. Similarly a very good resemblance between the far field results from FIT and FEM have been demonstrated.</p>

Dual-Port MIMO Rectangular Dielectric Resonator Antenna for 4G-LTE Application

2015 ◽  
Vol 781 ◽  
pp. 24-27 ◽  
Author(s):  
Raghuraman Selvaraju ◽  
Muhammad Ramlee Kamarudin ◽  
Mohsen Khalily ◽  
Mohd Haizal Jamaluddin ◽  
Jamal Nasir
Keyword(s):  
Dielectric Resonator ◽  
Impedance Bandwidth ◽  
Dielectric Resonator Antenna ◽  
Feed Line ◽  
Term Evolution ◽  
4G Lte ◽  
Rectangular Dielectric Resonator Antenna ◽  
Microstrip Feed Line ◽  
Microstrip Feed

A Multi Input Multi Output (MIMO) Rectangular Dielectric Resonator Antenna (RDRA) for 1.8 GHz Long Term Evolution (LTE) applications is investigated and presented. The antenna consisting of two rectangular dielectric resonator elements, both resonators are fed by microstrip feed line is etched on FR4 substrate. The simulated impedance bandwidth for port1 and port2 is 26.38% (1.6176-2.1093 GHz) and 26.80% (1.6146-2.1143GHz) respectively for |S11| ≤ -6dB, which can operate on LTE band 1-4,9,10,35-37 and 39. The gain of the MIMO RDRA is 3.2 dBi and 3.1 dBi at 1.8 GHz for port 1and port 2, respectively. The S-parameters, isolation, gain, and MIMO performance such as correlation coefficient and diversity gain of the presented RDR Antenna have been studied.

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