Iloiloga Antenna: O se Iloiloga o Fractal Metasurfaces ma Antenna Design

O le manatu o fractals na faʻalauiloaina e le mathematician Benoit B. Mandelbrot i le 1970s, e ui lava o le amataga o le fractal geometry e mafai ona toe maua i tua i le galuega muamua a le tele o mathematicians, e pei o Cantor (1870), von Koch (1904), Sierpinski (1915). ), Iulia (1918), Fatou (1926), ma Richardson (1953).
Na suʻesuʻeina e Benoit B. Mandelbrot le sootaga i le va o fractals ma le natura e ala i le faʻalauiloaina o ituaiga fou o fractals e faʻataʻitaʻi ai fausaga sili atu ona faigata, e pei o laau, mauga, ma matafaga. Na ia faia le upu "fractal" mai le Latin adjective "fractus", o lona uiga "ga'i" po'o le "ga'i", o lona uiga o lo'o tu'ufa'atasia i vaega malepelepe, e fa'amatala ai foliga fa'akomepiuta fa'aletonu ma vaevae e le mafai ona fa'avasegaina e le fa'asologa masani a le Euclidean. E le gata i lea, na ia atiaeina faʻataʻitaʻiga o le matematika ma algorithms mo le fausiaina ma le suʻesuʻeina o fractals, lea na mafua ai le fatuina o le seti lauiloa Mandelbrot, lea atonu o le sili ona taʻutaʻua ma mataʻina foliga faʻataʻitaʻi faʻatasi ma faʻalavelave faigata ma faʻasolosolo faʻasolosolo (silasila i le Ata 1d).
O le galuega a Mandelbrot e le gata na i ai se aafiaga i le matematika, ae o loʻo i ai foʻi faʻaoga i matata eseese e pei o le fisiki, ata komepiuta, biology, tamaoaiga, ma faatufugaga. O le mea moni, ona o lo latou gafatia e faʻataʻitaʻi ma fai ma sui o fausaga lavelave ma tutusa tutusa, o fractals e tele ni faʻaoga fou i vaega eseese. Mo se faʻataʻitaʻiga, ua faʻaaogaina lautele i vaega faʻaoga nei, o ni nai faʻataʻitaʻiga o la latou faʻaoga lautele:
1. Fa'akomepiuta ata ma fa'afiafiaga, fa'atupuina ata fa'anatura fa'anatura, la'au, ao, ma fe'ai;
2. Fa'amatalaga fa'atekonolosi fa'atekonolosi e fa'aitiitia ai le tele o faila numera;
3. Fa'asologa o ata ma fa'ailo, su'eina o ata mai ata, su'esu'eina o mamanu, ma tu'uina atu auala lelei fa'apipi'i ma toe fa'aleleia;
4. Biology, faʻamatalaina le tuputupu aʻe o laʻau ma le faʻatulagaina o neu i le faiʻai;
5. Antenna theory ma metamaterials, mamanuina fa'atusatusa / tele-band antennas ma metasurfaces fou.
I le taimi nei, o lo'o fa'aauau pea ona su'e fa'aoga fou ma fa'afouga fa'aoga fa'asaienisi, fa'ata'ita'i ma fa'atekonolosi.
I le eletise eletise (EM), e aoga tele foliga faʻapitoa mo faʻaoga e manaʻomia ai le faʻaitiitiga, mai antennas i metamaterials ma faʻasologa filifilia luga (FSS). O le fa'aogaina o le fa'ata'ita'i fa'asolosolo i antenna masani e mafai ona fa'ateleina ai le umi o le eletise, ma fa'aitiitia ai le aofa'i atoa o le fausaga o le resonant. E le gata i lea, o le uiga tutusa o foliga faʻapena e faʻapena ona lelei mo le faʻaalia o fausaga faʻapipiʻi tele-band poʻo broadband. O le fa'aitiitiga fa'aitiitiga fa'apitoa o fractals e fa'apitoa lava le manaia mo le fa'atulagaina o ata fa'ata, fa'asologa fa'asolosolo antennas, mea fa'apipi'i metamaterial ma metasurfaces mo fa'aoga eseese. O le mea moni, o le faʻaaogaina o elemene laʻititi laʻititi e mafai ona maua ai le tele o mea lelei, e pei o le faʻaitiitia o soʻotaga felagolagomaʻi poʻo le mafai ona galulue faʻatasi ma le laʻititi o le va o elemene, ma faʻamautinoa ai le lelei o le suʻesuʻeina ma le maualuga maualuga o le mautu.
Mo mafua'aga o lo'o ta'ua i luga, o antenna fractal ma metasurfaces o lo'o fa'atusalia ai ni vaega su'esu'e mata'ina se lua i le matata o le electromagnetics lea na tosina mai ai le tele o manatu i tausaga talu ai nei. O manatu uma e lua o loʻo ofoina atu auala faʻapitoa e faʻaogaina ma pulea ai galu electromagnetic, faʻatasi ai ma le tele o faʻaoga i fesoʻotaʻiga uaealesi, radar system ma lagona. O latou uiga tutusa e mafai ai ona latou laʻititi i le lapopoa aʻo faʻatumauina lelei le tali atu i le electromagnetic. O lenei faʻatusatusaga e sili ona aoga i faʻaoga avanoa, e pei o masini feaveaʻi, faʻailoga RFID, ma faʻaoga vaalele.
O le fa'aogaina o antenna fractal ma metasurfaces e mafai ona fa'aleleia atili feso'ota'iga uaealesi, ata, ma fa'aogaina o le radar, aua latou te fa'aogaina masini fa'apipi'i, maualuga fa'atinoga ma fa'aleleia galuega. E le gata i lea, o le fractal geometry o loʻo faʻateleina le faʻaaogaina i le mamanu o masini microwave mo suʻesuʻega o mea, ona o lona gafatia e faʻaogaina i le tele o laina faʻasolosolo ma lona mafai ona faʻaitiitiga. O su'esu'ega fa'aauau i nei vaega o lo'o fa'aauau pea ona su'esu'eina mamanu fou, meafaitino, ma faiga fa'ata'atia e iloa ai lo latou gafatia atoatoa.
O lenei pepa o loʻo faʻamoemoe e toe iloilo le suʻesuʻega ma le faʻaogaina o le alualu i luma o antenna fractal ma metasurfaces ma faʻatusatusa antenna faʻavae fractal o loʻo iai ma metasurfaces, faʻamaonia o latou lelei ma tapulaa. Ma le mea mulimuli, o se auiliiliga auiliili o reflectarrays fou ma metamaterial iunite o loʻo tuʻuina atu, ma o luʻitau ma atinaʻe i le lumanaʻi o nei fausaga eletise o loʻo talanoaina.