Design and Analysis of Textile ISM/UWB Antenna for On-Body Communications

Authors: Aven R. Hamza, Asaad Al-Hindawi, Hemin Ismael Azeez

An Optimized Design Procedure of Slot-Coupled Dielectric Resonator Antennas
Author: Mostafa Hefnawi

Acceptance Date: 01/05/2017


ABSTRACT
This paper presents an optimized design procedure of a slot-coupled cylindrical dielectric resonator antenna. The technique exploits an equivalent circuit of the resonating antenna to significantly reduce the number of full-wave EM simulations. The target values of the equivalent circuit elements are determined from the desired specifications such as bandwidth, center frequency and in-band return loss level. Design curves relating the elements of the equivalent circuit to the physical dimensions of the antenna are first established and then subsequently used to determine the parameters of the structure. The proposed approach is validated by comparing its scattering parameters to the ones obtained from measurements and from HFSS (High Frequency Structure Simulator). 

Flexible Compact MIMO T-Shape Antenna With Bridge Square Split Ring Resonator 
Author:
Hussein Q. AL-Fayyadh, Haider M. AlSabbagh, Hussain Al-Rizzo

Acceptance Date: 03/20/2017


ABSTRACT
A flexible compact Multi-input Multi-output (MIMO) T-shape monopole antenna with negative permeability (MNG) unit cell working at 4.9 GHz is presented. The proposed printed monopole antenna is suitable for homeland security, public safety service, personal area network (PAN) and WLAN/On-Scene Incident command applications. MNG unit cell is integrated with the structure to decrease the mutual coupling effect inherent with MIMO system. The achieved results show that there is a good enhancements in mutual coupling reduction -11.1 dB and boresight gain 2.2 with 14.1% impedance bandwidth and 71% efficiency for 0.29λ as a separation distance between the MIMO antennas.

Frequency Selective, High Transmission Spiral Terahertz Plasmonic Antennas

Authors: Xiangying Deng, Shunri Oda, and Yukio Kawano

Design and Optimization of Yagi-Uda Antenna for Gain using Genetic Algorithm as a Digital Television Migration Solution 
Author:
Steven Wandale, Chomora Mikeka

Acceptance Date: 05/30/2017


ABSTRACT
This paper examines genetic algorithm optimizer in antenna design. Specifically, the authors design and optimize the Yagi-Uda using Genetic Algorithm (GA) optimizer for digital terrestrial television (DTT) reception. The results show enhanced antenna performance as compared to current conventional antennas sold on the market. This paper, presents the proposed Yagi-Uda antenna called WACtenna designed preliminary with the gain of 7.9 dBi, 70 degrees beamwidth. Then it was optimized using Genetic Algorithm (GA) to the gain of 8.19 dBi and 100 degrees beamwidth. The results indicate excellent bandwidth and gain properties with very optimum impedance characteristics. Results exceeded previous Yagi-Uda antenna produced by at least 3.17% in broadside gain.

Design and Optimization of Next Generation Mobile Smart Multi Band M-shape Vivaldi Antenna 
Authors:
Shokhan A.Omar, Jalal H.Amin and Mehmet Kaya

Acceptance Date: 02/09/2017


ABSTRACT
Smart antenna is a co-planar broadband antenna, which is made from a dielectric plate metalized on both sides. Double-sided printed circuit board used in the design of this type of Smart antenna makes it cost effective at microwave frequencies exceeding 1 GHz. This type of antenna used in broadband of frequency especially ultra-wide band because it’s manufacturing is easy for which PCB production is used. In this paper, a new model of Vivaldi antenna has been designed based on the dual Vivaldi with M-shaped, the design based on the standards and parameters for the antenna, the dimensions and size of the designed antenna given depending on the wavelength. After the design process, experimental setup done to obtain the practical parameters for the antenna. Optimization for the best VSWR versus operating frequencies, the design and simulation results presented like radiation pattern and the VSWR for many operating frequencies, comparison with the other Smart antenna presented to show the improvements in the proposed and designed antenna, finally, some conclusions presented.

Archive

Optimization of Dielectric Rod Antenna Design in Millimeter Wave Band for Wireless Communications
Author:
Nancy Ghattas, Atef M. Ghuniem, Sherif M. Abuelenin

Acceptance Date: 07/11/2017


ABSTRACT
Dielectric rod antennas are promising candidates to be used in millimeter wave band wireless communications. The optimization of a patch-fed dielectric rod antenna design at millimeter wave band is presented in this work. This design is composed of simple dielectric rod antenna made of low cost Teflon with relative permittivity of 2.1 that is fed by a rectangular patch antenna. Compared to the conventionally used tapered dielectric rod antennas, this configuration is capable of producing higher gain for a given antenna length. The design is optimized to achieve gain up to 17.5 dBi and impedance bandwidth up to 4.4 GHz at 60 GHz. A 4-element array is proposed to increase the gain up to 21 dBi. Simulations are performed using CST microwave studio, and their results are presented.










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Microstrip Antenna for Wi-Fi Energy Harvesting

Authors: Jorge Cabrera, Haider Khaleel


Editorial Board


Dr. Dimitris Anagnostou

South Dakota School of Mines and Technology, USA


Dr. Kathleen Melde

University of Arizona (USA)


Dr. John Young
University of Kentucky (USA)


Dr. Haider Raad

Xavier University, Ohio (USA)


Dr. Hussain Al-Rizzo

University of Arkansas at Little Rock (USA)


Dr. Alex Stameroff

Keysight Technologies (USA)


Dr. Karim Kabalan

American University of Beirut (Lebanon)




Aims and Scope: The Journal of Modeling and Simulation of Antennas and Propagation is a quarterly peer-reviewed journal which provides an international platform for researchers and engineers on issues relevant to all aspects of theoretical and numerical modeling and simulation of antennas and electromagnetic propagation covering the KHz to THz frequency spectrum. Dissemination of simulation results from electromagnetic solvers such as CST Microwave Studio, HFSS, ADS, SONNET, SEMCAD, Microwave Office, etc.., are especially encouraged. Topics of interest include but are not limited to planar and non-planar antenna topologies such as microstrip, monopole, dipole, inverted F, reflectors, Yagi-Uda, parabolic, horn, and log periodic antennas; passive and active antenna arrays, smart antennas, miniaturization techniques, metamaterial based antennas and metamaterial structures such as High Impedance Surfaces, Artificial Magnetic Conductors, Frequency Selective Surfaces, and Negative Refractive Index Metamaterials. Other topics such as EM media interaction, Radar, multipath interference, electromagnetic compatibility, mutual coupling, Specific Absorption Rate simulation are also welcome.


Potential authors should submit a full manuscript via email to: submission@unitedscholars.net as a Microsoft Word and PDF attachment. 

Prior to submission of your manuscript, please refer to the Authors Guidelines.


Click here to go back to the list of our Journals.

 Journal of Modeling and Simulation of Antennas and Propagation​

Modeling of Surface Temperature Distribution and Thermal Effects on Reflector Antenna Radiation Characteristics  
Author: Asaad Mubdir Jassim Al-Hindawi





















































 
























































































Enhancement of Functional properties of antenna with Application of DGS
Author:
Soumya Ranjan Mishra, Sheeja K L

Acceptance Date: 04/25/2017


ABSTRACT
A Simple and easy Defected Ground Structure (DGS) is proposed. The objective is to achieve suppression of cross polarization resulting in improved polarization purity in radiated fields. For this purpose, firstly rectangular and circular patch antennas were taken into consideration, with the same geometry of DGS. In the next configuration, a circular patch antenna was incorporated with a rectangular shaped DGS. The employed DGS appears to be highly efficient to enhance the functional properties of the antenna, especially suppressing Cross Polarization in the H-plane. Rectangular microstrip patch antennas have been designed with different aspect ratios and show 10 dB suppression of Cross Polarization in H-plane. Similarly, a circular patch antenna inspired by rectangular and arch shaped DGS’s has been studied. The effect of total engraved area and the gap between DGS‟s on the resonant frequency was examined and presented.  

Comparison Study and Effect of Cut and Un-Cut Rectangular Spiral Metamaterial on Properties ofMicrostrip Patch Antenna
Authors:
Asaad  M.  Jassim  Al-Hindawi and Chnar Hussein Aziz

Acceptance Date: 02/02/2017


ABSTRACT
The present paper investigates the effects of uncut and cut single rectangular spiral metamaterial unit cells on the performance of a microstrip antenna. A studied microstrip patch antenna is designed to operate at 2.4GHz and is fed by a microstripline of a rectangular shape. Initially, the designed antenna is covered by unit cells of a single uncut spiral metamaterial. The second antenna design is covered by different cuts in the spiral cell. These spiral cut shapes are chosen separately to be horizontally, vertically, diagonally and combinations of them. The antenna design of uncut cells leads to an increase in the number of resonance frequencies while the antenna gain is decreased. Meanwhile, the design of the antenna with cut cells leads to an increase in the number of resonance frequencies yielding to a better S11 and an increase in the antenna gain compared with those of the antenna of uncut cells. The above results are obtained using HFSS simulator.

Low Profile Dual Inverted-F Antenna for DTV Reception
Author:
Steven Wandale, Chomora Mikeka

Acceptance Date: 04/25/2017


ABSTRACT
This paper presents the performance and analysis of a Dual Inverted-F antenna (DIFA).The antenna is small, specifically designed and optimized for digital television reception (DTV). Method of Moments (MoM) technique using NEC-2 has been employed in antenna designing, analysis and optimization of the proposed antenna. The paper further presents the proposed antenna’s radiation characteristics, voltage standing wave ratio (VSWR), return loss (S11) and its gain.

Electromagnetic Effect of Rectangular Spiral Metamaterial on Microstrip Patch Antenna Performance
Authors: Chnar Hussein Aziz and Asaad M. J. Al-Hindawi

A New Channel Quality Indicator Mapping Scheme for High Mobility Applications in LTE Systems

Authors: Ali Othman, Siddeeq Y. Ameen, Hussain Al-Rizzo


A Wearable Self Powered Global Positioning System

Authors: Casey White, Haider Khaleel


Spectral Characteristics of Photoconductive Dipole Antennas Including Photocurrent and Receiving Antenna Effects

Authors: Katsunari Irie, Keisuke Takano, John C. Young, Kohji Yamamoto, Masahiko Tani, Takehito Suzuki


​​ISSN: 2377-1674

Editor in Chief: Dr. Dimitris Anagnostou

Email: info@unitedscholars.net

Frequency: Quarterly

Publisher: United Scholars Publications

Discipline: Electrical Engineering


Quadrifilar Helical Antenna as a Low-Cost Alternative to Yagi Antennas

Authors: Amandeep Gill, Albert Maldonado


Conformal Patch Antenna for RADAR Altimeter Applications

Authors: Jon Porrazzo, Casey White


Flexible Textile Based Monopole Antenna

Authors: Gourilekshmi Jayasree Thankam, Syed Faiza Qadri


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