Modeling and Design of a Novel Backward-Wave CPW-Antenna Based on Negative Refractive Index
A new field of physics has appeared withthe emergence of materials known as Left handedmaterials (LHM) or metamaterials.Thesematerials show very particular characteristics.Theirindex of refraction has a negative value,which resultsin the reversal of Snells law.Whereas in traditionalmaterials,the Poynting vector S always forms aright-handed triplet with E and H (S=E∧H).In theleft handed media,the Poynting vector S and thewave vector K are in opposite directions.Thus,thewave moves in the direction opposite to the directionof the energy flow: phase speed and group speed areanti-parallel.Therefore,a left-handed media isartificial and does not exist in nature.Indeed,whenthese materials are inserted into a guided wave device,one obtains the backward wave effect.The goal ofthis work is to study more in details this physicalphenomenon.To undertake this study,this paperpresents also the design of a 10 GHz beam-scanningCPW-Antenna fabricated on metamateriai support.
Backward waves compositeright/left-handed transmission lines metamaterials negative refractive index CPW Antennas.
Abdelaziz Hamdi Abdelaziz Samet
National School of Engineering,Tunis,El Manar University,BP 37-Tunis Belvedere 1002,Tunisia
国际会议
2008 China-Japan Joint Microwave Conference(2008年中日微波会议)
上海
英文
423-426
2008-09-10（万方平台首次上网日期，不代表论文的发表时间）