18. Application of Metamaterials to Microwave Patch and Leaky-Wave Antennas (Printed)

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1、FilippoCapolino/ApplicationsofMetamaterials_CFinalsPage--#18ApplicationofMetamaterialstoMicrowavePatchandLeaky-WaveAntennasLucioVegniUniversity“RomaTre”.ReviewoftheAdoptedTerminology.................-FilibertoBilotti.BeatingtheDiffractionLimitthro

2、ughUniversity“RomaTre”Metamaterials........................................-.DesignofCompactAntennasLoadedwithAndreaAlùMetamaterials........................................-PlanarPatchAntennas●Leaky-WavePlanarAntennas●UniversityofTexasatAustinandUniversityofPennsy

3、lvaniaLeaky-WaveCylindricalAntennas.Real-LifeImplementationofMiniaturizedNaderEnghetaMetamaterialComponents...........................-UniversityofPennsylvaniaReferences.................................................-Inthischapter,wereviewthepotentialapplicati

4、onsofmetamaterialstomicrowavepatchandleaky-waveantennas.Afterabriefoverviewoftheadoptedterminology,wepresentthephysicalmechanismsresponsibleforthenovelfeaturesthatmetamaterialantennasmayprovideintermsofpotentiallysuperiorperformancesoverconventionalradiators.Then,wereviewt

5、hedesignofpatchantennasandleaky-waveantennasloadedwithmetamaterials,givingsomenumericalexamples.Finally,wediscussthepossiblepracticalimplementationoftheseantennaswithreal-lifemetamaterialinclusions.18.1ReviewoftheAdoptedTerminologyMetamaterialsbelongtothewideclassofcomplex

6、materials(i.e.,artificialelectromagneticmaterialsdesignedinordertoexhibitsomedesiredpropertiesinagivenfrequencyrange)[,].Suchengi-neeredmaterialsareusuallyobtainedbycombiningmaterialswithdifferentproperties,intheformofmetallic/dielectricinclusionsperiodicallyorrandomlydi

7、stributedinahostmaterial.Thedegreesoffreedomavailableintheframeofcomplexartificialmaterialsallowengineeringunusualcombi-nationsofinclusionsandhostmaterialsthatmaygiverisetonewproperties,notactuallyavailableinnaturalmaterials.Suchengineeredmaterialsarecalledmetamaterials,si

8、ncetheirunusualpropertiesallowgoingbeyondwhatconventionalmaterialscando.Thefirststageofth