scholarly journals RESONANCE FREQUENCIES AND FAR FIELD PATTERNS OF ELLIPTICAL DIELECTRIC RESONATOR ANTENNA: ANALYTICAL APPROACH

2006 ◽  
Vol 64 ◽  
pp. 81-98 ◽  
Author(s):  
A. Tadjalli ◽  
Abdel Razik Sebak ◽  
Tayeb Ahmed Denidni
Keyword(s):  
Dielectric Resonator ◽  
Analytical Approach ◽  
Far Field ◽  
Dielectric Resonator Antenna ◽  
Field Patterns ◽  
Resonance Frequencies

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>

MULTILAYER DIELECTRIC RESONATOR ANTENNA TRANSMITARRAY FOR NEAR-FIELD AND FAR-FIELD FIXED RFID READER

2012 ◽  
Vol 27 ◽  
pp. 129-142 ◽  
Author(s):  
Saber Helmy Zainud-Deen ◽  
Shaymaa M. Gaber ◽  
Hend Abd El-Azem Malhat ◽  
Kamal Hassan Awadalla
Keyword(s):  
Dielectric Resonator ◽  
Near Field ◽  
Far Field ◽  
Dielectric Resonator Antenna ◽  
Rfid Reader ◽  
Multilayer Dielectric

scholarly journals Dual-Band Circularly Polarized Dielectric Resonator Antenna for WLAN and WiMAX Applications

Sensors ◽  
2020 ◽  
Vol 20 (4) ◽  
pp. 1137 ◽  
Author(s):  
Amir Altaf ◽  
Munkyo Seo
Keyword(s):  
Dielectric Resonator ◽  
Field Measurements ◽  
Second Order ◽  
Dual Band ◽  
Impedance Bandwidth ◽  
Far Field ◽  
Dielectric Resonator Antenna ◽  
Frequency Range ◽  
Entire Frequency Range ◽  
Circularly Polarized

In this paper, a new dual-band circularly polarized (CP) dielectric resonator antenna for WLAN and WiMAX applications is proposed. The dielectric resonator has an asymmetric Y-shaped geometry. By properly selecting the length of the arms, the pairs of fundamental (TE 111 ) and second-order (TE 211 ) are excited separately at the design frequencies to radiate the CP wave. The measurement shows that the fabricated antenna exhibits a wide impedance bandwidth for |S 11 | < −10 dB of 62.07% (2.2–4.18 GHz). The far-field measurements in the broadside direction demonstrated a dual-band CP response with 3 dB ARBWs of 4.92%(2.38–2.5 GHz) at the lower and 12.64% (3.26–3.70 GHz) at the upper band. The measured CP bands cover the entire frequency range of WLAN (2.401–2.495 GHz) and WiMAX (3.4–3.69 GHz) at the lower and upper bands, respectively.

scholarly journals Higher-Order-Mode Triple Band Circularly Polarized Rectangular Dielectric Resonator Antenna

2021 ◽  
Vol 11 (8) ◽  
pp. 3493
Author(s):  
Muhammad Fitra Zambak ◽  
Mohd Najib Mohd Yasin ◽  
Ismahayati Adam ◽  
Javed Iqbal ◽  
Mohamed Nasrun Osman
Keyword(s):  
Dielectric Resonator ◽  
Low Cost ◽  
Higher Order ◽  
Coaxial Cable ◽  
Impedance Bandwidth ◽  
Dielectric Resonator Antenna ◽  
Order Mode ◽  
Resonance Frequencies ◽  
Rectangular Dielectric Resonator Antenna ◽  
Higher Order Mode

The paper presents a triband circular polarized rectangular dielectric resonator antenna. A single coaxial cable feeds the DRA to a double stub strip on the DRA side. A patch strip coupled to the feed assists in widening the bandwidth of the proposed DRA. The degenerate mode pair TE∂11x and higher-TE∂23x has been excited to achieve CP and enhance the antenna gain. The higher-order mode has been excited using a low-cost simple excitation mechanism without compromising on the size and shape of the DRA. An impedance bandwidth of 48% with a gain ~6–9 dBic was achieved in all resonance frequencies. Additionally, the AR bandwidth of 5.5%, 4.2%, and 2.76% was obtained at three different frequencies. Note that the proposed DRA exhibits a wide beamwidth of 112o, which is good for better signal reception. A comparison between the measured with simulated results shows that the measured results are matched by the simulated result trends.

Artificial Magnetic Conductor Based Miniaturized Frequency Re-configurable Dielectric Resonator Antenna for 5G and WBAN Applications

2020 ◽  
Vol 35 (9) ◽  
pp. 1064-1072
Author(s):  
Shahid Khan ◽  
Hazrat Ali ◽  
Syed Shah ◽  
Haider Ali ◽  
Camel Tanougast
Keyword(s):  
Radiation Pattern ◽  
Dielectric Resonator ◽  
Wireless Body Area Network ◽  
Maximum Efficiency ◽  
Impedance Bandwidth ◽  
Area Network ◽  
Dielectric Resonator Antenna ◽  
Magnetic Conductor ◽  
Artificial Magnetic Conductor ◽  
Resonance Frequencies

In this work a novel miniaturized frequency reconfigurable Dielectric Resonator antenna using Artificial Magnetic Conductor (AMC) surface is proposed. The prototype is set to work for 5G mid-band frequencies and Wireless Body Area Network (WBAN) applications. The work consists of two parts: firstly, the miniaturization of the prototype using AMC surface and secondly using the same AMC surface to reconfigure the frequency to another wireless application. Using AMC surface, the DR volume is reduced by 85% percent. Connecting the AMC unit cells through ideal switches (micro-trip slabs) re-configures the DR for different frequency. The overall performance observed before switching as well as after switching in both the cases is promising. The design is fabricated for performance analysis. A close agreement is reported between simulated and measured values of the reflection coefficients, radiation pattern, gain and efficiencies. The prototype has stable radiation pattern for both the operating frequencies. The impedance bandwidth values for both the resonance frequencies are 14.2% and 16% respectively. The prototype has a maximum gain of 6.8dBi and a maximum efficiency of 88%.

scholarly journals A 3-D Meandered Probe-Fed Dual-Band Circularly Polarized Dielectric Resonator Antenna

Sensors ◽  
2018 ◽  
Vol 18 (8) ◽  
pp. 2421 ◽  
Author(s):  
Amir Altaf ◽  
Jin-Woo Jung ◽  
Youngoo Yang ◽  
Kang-Yoon Lee ◽  
Sang-Hwa Yi ◽  
...  
Keyword(s):  
Experimental Verification ◽  
Field Measurement ◽  
Dielectric Resonator ◽  
Axial Ratio ◽  
Dual Band ◽  
Far Field ◽  
Dielectric Resonator Antenna ◽  
Circularly Polarized ◽  
Metallic Strip ◽  
Peak Gain

A dual-band circularly polarized (CP) dielectric resonator antenna (DRA) designed on multi-layer substrates is proposed. An asymmetric C-shaped metallic strip is also incorporated into the upper side of the top substrate in the proposed design. The hexagonal dielectric resonator (DR) is excited by the proposed 3-D meandered probe, which generates multiple orthogonal TE-modes. It is found that the lower CP band arises due to the pair of fundamental modes of the hexagonal DR. In the upper CP band, pairs of higher broadside and even modes of the hexagonal DR are combined with a CP band that is induced by the asymmetric C-shaped metallic strip to yield a wide 3 dB axial ratio bandwidth (ARBW). A prototype of the proposed DRA is fabricated for experimental verification. The antenna exhibits a measured −10 dB reflection bandwidth of 56.43% (2.15–3.84 GHz). The far-field measurement shows measured 3 dB ARBWs of 7.56% (2.29–2.47 GHz) with a peak gain of 5.6 dBic and 16.47% (3.12–3.68 GHz) with a peak gain of 7.84 dBic in the lower and upper bands, respectively.

scholarly journals Cylindrical Dielectric Resonator Antenna-Based Sensors for Liquid Chemical Detection

Sensors ◽  
2019 ◽  
Vol 19 (5) ◽  
pp. 1200 ◽  
Author(s):  
Amjad Iqbal ◽  
Amor Smida ◽  
Omar Saraereh ◽  
Qais Alsafasfeh ◽  
Nazih Mallat ◽  
...  
Keyword(s):  
Radio Frequency ◽  
Dielectric Resonator ◽  
Microstrip Line ◽  
Chemical Detection ◽  
Dielectric Resonator Antenna ◽  
Rectangular Slot ◽  
Resonance Frequencies ◽  
Different Types ◽  
Radio Frequency Signals ◽  
Liquid Chemical

A compact, cylindrical dielectric resonator antenna (CDRA), using radio frequency signals to identify different liquids is proposed in this paper. The proposed CDRA sensor is excited by a rectangular slot through a 3-mm-wide microstrip line. The rectangular slot has been used to excite the CDRA for H E M 11 mode at 5.25 GHz. Circuit model values (capacitance, inductance, resistance and transformer ratios) of the proposed CDRA are derived to show the true behaviour of the system. The proposed CDRA acts as a sensor due to the fact that different liquids have different dielectric permittivities and, hence, will be having different resonance frequencies. Two different types of CDRA sensors are designed and experimentally validated with four different liquids (Isopropyl, ethanol, methanol and water).

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