Izindaba - I-Planar Spiral Antenna: Lapho i-Bandwidth Ibaluleke Ngempela

Buza noma yimuphi unjiniyela we-antenna mayelana nokusebenza kwe-wideband, futhi kungenzeka ukuthi ama-antenna ajikelezayo ajikelezayo azovela ekuqaleni kwengxoxo. Lezi zakhiwo eziyisicaba, eziyindilinga—ezinezingalo ezigobile njengeminwe noma umthala—ziye zaxazulula izinkinga ze-bandwidth kusukela ngawo-1950. Futhi zisasebenza nanamuhla.

Iyini i-Planar Spiral Antenna?

Kulula kakhulu,i-antenna ejikelezayo ejikelezayoinezingalo ezimbili noma ngaphezulu zensimbi eziqoshwe phezu kwe-substrate encane ye-dielectric, ezijikeleza ngaphandle zisuka endaweni yokudla ephakathi. Imiklamo emibili iyabusa: i-Archimedean spiral, lapho izingalo zisakazeka khona ngesivinini esingaguquki, kanye ne-logarithmic spiral, lapho ijika likhula khona kakhulu. Zombili zifeza umgomo ofanayo—ububanzi obukhulu kakhulu—kodwa nge-geometry ehlukene kancane.

Isihluthulelo sisentweni ebizwa ngokuthi umqondo "wesifunda esisebenzayo". Ngemvamisa ethile, indawo ethile efana nendandatho kuphela ye-spiral—lapho umjikelezo uhambisana khona nobude be-wavelength—ekhipha ukukhanya okusebenzayo. Shintsha imvamisa, bese indawo esebenzayo ivele ihambe ngaphakathi noma ngaphandle ngezingalo. I-antenna ayinandaba nokuthi uyiphonsa imvamisa engakanani; iyaqhubeka isebenza.

Kungani Kufanele Ukhethe I-Planar Spiral?

1. Ukusebenza kwe-Ultra-Wideband

Lesi yisici esiyinhloko. I-spiral eklanywe kahle ingasebenza ngaphezu kwezilinganiso zemvamisa ezingu-10:1 noma ngisho no-20:1—kusukela kumakhulu ambalwa e-MHz kuya kumashumi e-GHz—ngokuphakelayo okukodwa. Kumasistimu adinga ukumboza amabhendi amaningi ngaphandle kokushintsha ama-antenna, lokho kushintsha umdlalo.

2. IsiyingiUkwahlukana Ngokwemvelo

Ama-antenna ajikelezayo akhipha i-polarization eyindilinga ngokwemvelo. Azikho i-polarizers zangaphandle, azikho ubunzima obengeziwe. Lokhu kuzenza zifaneleke ngokwemvelo ekuxhumaneni kwesathelayithi, i-GPS, nanoma yiluphi uhlelo lokusebenza lapho ukungalingani kwe-polarization noma ukujikeleza kwe-Faraday kuyinkinga.

3. Iphrofayili Ephansi Futhi Elula

Ngenxa yokuthi ziphrintiwe kuma-substrate amancane, ama-planar spiral ayisicaba futhi alula. Angafakwa ezindaweni ezimanzi, avumelane nezakhiwo ezigobile, noma ahlanganiswe ngqo ezinhlelweni lapho ubukhulu buyinkinga khona.

4. Iphethini Ehambisanayo Kuyo Yonke I-bandwidth

Ngokungafani namanye ama-antenna e-wideband ashintsha ukuma kwawo kwe-beam ngokuvama, ama-spirals agcina iphethini elizinzile—ngokuvamile i-bidirectional beams ibheke eceleni kwendiza. Lokhu kubikezela kubalulekile uma uklama ukumbozwa.

Lapho Uzobathola Khona

•Impi Ye-elekthronikhi Nokuqapha: Izinhlelo ezidinga ukuthola, ukuminyana, noma ukuvimba amasignali ku-spectrum ebanzi zithembele kuma-spirals. Uma ungazi ukuthi usongo luzovelaphi—noma ukuthi luzosetshenziswa kangaki—udinga i-antenna engenandaba.

•I-BroadbandUkuqapha Nokuhlola: Ema-lab e-EMC kanye naseziteshini zokuqapha i-spectrum, ama-spirals asebenza njengezinkomba ezithembekile zokulinganisa ama-antenna nezinhlelo kuwo wonke ama-band amaningi ngokusetha okukodwa.

•Ukuxhumana kwesathelayithi ne-GPS: Ukuhlukaniswa okuyisiyingi okungokwemvelo kanye nobubanzi be-bandwidth kwenza ama-spirals abe yisinqumo esiqinile sama-terminals asemhlabeni kanye nama-antenna asemkhathini, ikakhulukazi lapho kudingeka ama-frequency band amaningi ambozwe.

•I-Radar Engena Emhlabathini: Ama-pulse amafushane asho ububanzi be-bandwidth. Ama-Spirals aphatha izimpawu ezifana ne-impulse ezisetshenziswa ekuthwebuleni izithombe ezingaphansi komhlaba ngaphandle kokukhala noma ukuhlanekezela.

Umcabango ovela eLab

Osebenza naye wake wathi, "Nge-spiral, uhweba inzuzo nge-bandwidth—futhi isikhathi esiningi, lokho kuwukuhweba okufanele." Wayeqinisile. Ezweni lapho amasignali engabikezeleki futhi ukwabiwa kwama-frequency kuqhubeka nokushintsha, ukuba ne-antenna enganaki ama-frequency kuyinto yokunethezeka okufanele ikhokhwe.

Ama-antenna e-RFMiso Planar Spiral

Sinikeza ama-antenna ajikelezayo ajikelezayo amboza ububanzi bemvamisa kusukela ku-UHF kuya ku-millimeter-wave, ngezinketho zokusekela i-cavity kanye ne-substrates ezenziwe ngokwezifiso. Kungakhathaliseki ukuthi wakha uhlelo lwe-EW noma usetha isiteshi sokuqapha i-broadband, sinomklamo ofanelana.