LEADER 02948nam 2200625z- 450 001 9910367740003321 005 20210211 010 $a3-03921-877-8 035 $a(CKB)4100000010106317 035 $a(oapen)https://directory.doabooks.org/handle/20.500.12854/49293 035 $a(oapen)doab49293 035 $a(EXLCZ)994100000010106317 100 $a20202102d2019 |y 0 101 0 $aeng 135 $aurmn|---annan 181 $ctxt$2rdacontent 182 $cc$2rdamedia 183 $acr$2rdacarrier 200 00$aHigher Symmetries and Its Application in Microwave Technology, Antennas and Metamaterials 210 $cMDPI - Multidisciplinary Digital Publishing Institute$d2019 215 $a1 online resource (98 p.) 311 08$a3-03921-876-X 330 $aArtificial materials have been widely studied and used in photonics and microwaves in the last few decades. Recent research has proven that the introduction of specific higher symmetries in each cell of a periodic medium is an effective approach to obtain unprecedented exotic behaviors and to overcome the current limitations of these devices. For example, simple symmetries of a purely spatial type (glide or twist transformations) can have a huge impact on the properties of the resulting materials, thus defining wideband behaviors for flat lenses or large stop bands for novel EBG materials. This Special Issue opens with a novel discussion on the effect of time-reversal symmetries in antenna theory and presents new structures exploiting symmetries for antenna and microwave components, such as flat lenses, helix antennas, and gap-waveguides. Finally, new modeling methods are discussed for the study of wave propagation along glide surfaces and twist lines. 606 $aHistory of engineering and technology$2bicssc 610 $aAntennas 610 $abed of nails 610 $acomplementary split ring resonator (CSRR) 610 $acomplementary split-ring resonator 610 $adispersion 610 $adispersion analysis 610 $adispersion diagram 610 $agap waveguide technology 610 $aglide symmetry 610 $ahelix antennas 610 $ahigher symmetries 610 $ahigher symmetry 610 $alens antenna 610 $aLorentz reciprocity 610 $amicrowave printed circuits 610 $amode matching 610 $aperiodic structures 610 $arefractive index 610 $asingle plane 610 $astop-band 610 $astopband 610 $aTime-reversal symmetry 610 $atransmission matrix 610 $atwist symmetry 615 7$aHistory of engineering and technology 700 $aValerio$b Guido$4auth$01290159 702 $aQuevedo-Teruel$b Oscar$4auth 906 $aBOOK 912 $a9910367740003321 996 $aHigher Symmetries and Its Application in Microwave Technology, Antennas and Metamaterials$93021367 997 $aUNINA