With the ever-increasing need for wireless communication and the emergence of many systems, it is important to design broadband antennas to cover a wide frequency range. The aim of this paper is to design a broadband patch antenna, employing the three techniques of slotting, adding directly coupled parasitic elements and fractal electromagnetic band gap (EBG) structures.The bandwidth is improved from 9.3 to 23.7%. A wideband ranging from 4.15 to 5.27 GHz is obtained. Also, a comparative analysis of embedding EBG structures at different heights is also done. The composite effect of integrating these techniques in the design provides a simple and efficient method for obtaining low-profile, broadband, and high-gain antenna. By the addition of parasitic elements the bandwidth was increased to 18%. Later on by embedding EBG structures the bandwidth was increased up to 23.7%. The design is suitable for a variety of wireless applications like WLAN and radar applications.
This paper proposes a new generation of antenna that applies metamaterial as a base construction. With the use of dual band high impedance surface (HIS) structures, the bandwidth, return loss, and gain of U-slot patch antenna is improved at resonant frequencies 2.24 GHz and 5.8 GHz.The proposed new modified U-slot antenna has dual band impedance bandwidth from about 2.1886 to 2.27 GHz and 5.6149 to 7.2259 GHz. From the simulation result it was found that the upper frequency band of the proposed antenna lies in the band of 5.725∼5.825 GHz regulated by IEEE 802.11a (upper band) and can be used for bluetooth and WLAN applications. We perform this analysis on structures which composed of rectangular lattice patches periodic arrangements. All the dimensions and shapes of the unit cell geometry are optimized in order to get a broad bandwidth and high return loss. The lattice structure comprises of an array of 7×5 rectangular patches embedded in the substrate.
EXECUTIVE SUMMARYTo address the shortfall in adequate modeling and simulation (M&S) software that can model a wide range of electromagnetic problems, PEO-DD(X)/PMS 500 commissioned the development of a plan for delivery of a Validated, Integrated, Physics-based Electromagnetic Radiation (VIPER) tool set. Microwave Office™ was identified as one of the most promising microwave electronics simulation codes and was selected for further development and verification and validation. This report shows a wide range of EM test cases in which Microwave Office™ simulations included linear passive components, linear active components, nonlinear components, and system-level circuits.The verification and validation (V&V) of Microwave Office™ conducted under this study was a major success. Each test case designed for this V&V effort was chosen to verify Microwave Office™ performance in a specific area of user need or to validate the underlying theoretical framework of the M&S package. Microwave Office™ demonstrated its ability to accurately predict the performance of a wide range of electromagnetic problems. Microwave Office™ was verified and validated as a capable modeling and simulation tool for electronic systems to be used on the DD(X) program.v CONTENTS
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.