scholarly journals Closely Coupled Metallodielectric Electromagnetic Band-Gap Structures Formed by Double-Layer Dipole and Tripole Arrays

2004 ◽  
Vol 52 (5) ◽  
pp. 1149-1158 ◽  
Author(s):  
A.P. Feresidis ◽  
G. Apostolopoulos ◽  
N. Serfas ◽  
J.C. Vardaxoglou
Keyword(s):  
Band Gap ◽  
Double Layer ◽  
Electromagnetic Band Gap

scholarly journals Bandwidth Improvement of EBG Resonator Antennas Using Double-Layer FSS

2008 ◽  
Vol 2008 ◽  
pp. 1-5 ◽  
Author(s):  
Lina Moustafa ◽  
Bernard Jecko
Keyword(s):  
Band Gap ◽  
Double Layer ◽  
Phase Variation ◽  
Frequency Selective Surface ◽  
Electromagnetic Band Gap ◽  
Reflection Phase ◽  
Frequency Selective ◽  
5 Ghz

A double-layer frequency selective surface (FSS) is proposed as a means to enhance the bandwidth of an electromagnetic band gap (EBG) resonator antenna. Due to its inverted reflection phase variation and its wide selectivity bandwidth, the structure used in the radiating wall of the resonator allows increasing the radiating bandwidth of the last one. The resonator is fed by a patch feeding source placed inside the cavity at the proximity of its metallic ground. The antenna bandwidth is significantly improved by virtue of employing the double-layer FSS. Modelled results of an antenna working at 5 GHz are shown.

scholarly journals Design of a Dual-Band Sectoral Antenna for Hiperlan2 Application Using Double Layers of Metallic Electromagnetic Band Gap (M-EBG) Materials as a Superstrate

2009 ◽  
Vol 2009 ◽  
pp. 1-5 ◽  
Author(s):  
M. Hajj ◽  
R. Chantalat ◽  
B. Jecko
Keyword(s):  
Band Gap ◽  
Radiation Pattern ◽  
Double Layer ◽  
Patch Antenna ◽  
Dual Band ◽  
Double Layers ◽  
Electromagnetic Band Gap ◽  
Half Power ◽  
Novel Design

A novel design of a sectoral antenna that utilizes a double layer Metallic Electromagnetic Band Gap (M-EBG) as a superstrate for dual band directivity enhancement is presented in this paper. We obtain the different operating frequencies by adjusting the distance of the lower M-EBG layer from printed patch antenna and also the height between upper and lower M-EBG layers. This antenna operates according to a sectoral radiation pattern form presenting a half power beamwidth of at least . The proposed structure presents more than 17 dB directivity enhancement at 5.25 GHz and 5.65 GHz as compared to those of a patch antenna with 9 dB directivity. The principle is explained and applied to a Hiperlan2 antenna.

Enhanced Ultra-Wideband (UWB) Circular Monopole Antenna with Electromagnetic Band Gap (EBG) Surface and Director

2014 ◽  
Author(s):  
Amir I. Zaghloul ◽  
Youn M. Lee ◽  
Gregory A. Mitchell ◽  
Theodore K. Anthony
Keyword(s):  
Band Gap ◽  
Monopole Antenna ◽  
Ultra Wideband ◽  
Electromagnetic Band Gap
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