Ikintu cyingirakamaro kubara imbaraga zo kwakira antene niahantu hezacyangwaaperture.Dufate ko indege izunguruka ifite polarisiyasi imwe na antenne yakira iba kuri antenne.Ongera utekereze ko umuraba ugenda werekeza kuri antenne mu cyerekezo cya antenne yerekana imirasire ntarengwa (icyerekezo imbaraga zakirwa).
Hanyumaapertureibipimo bisobanura imbaraga zafashwe ziva kumurongo windege.Rekapkuba imbaraga zingana zindege (muri W / m ^ 2).NibaP_tYerekana imbaraga (muri Watts) kuri antene ya terefone iboneka kubakira antene, hanyuma:
Kubwibyo, agace gakomeye kerekana gusa imbaraga zifatwa mumiraba yindege kandi zigatangwa na antene.Aka gace gatera igihombo imbere muri antenne (igihombo cya ohmic, igihombo cya dielectric, nibindi).
Isano rusange kuri aperture ikora neza ukurikije inyungu ya antenna yunguka (G) ya antenne iyo ari yo yose itangwa na:
Ahantu heza cyangwa ahantu heza hashobora gupimwa kuri antene nyayo ugereranije na antenne izwi hamwe na aperture yatanzwe neza, cyangwa kubara ukoresheje inyungu zapimwe hamwe nuburinganire bwavuzwe haruguru.
Aperture ikora neza izaba igitekerezo cyingirakamaro cyo kubara imbaraga zakiriwe ziva kumurongo.Kugirango ubone ibi mubikorwa, jya mu gice gikurikira kuri formulaire yo kohereza.
Ikigereranyo cyo kohereza kwa Friis
Kuriyi page, turamenyekanisha kimwe muburinganire bwibanze mubitekerezo bya antenna ,.Ikigereranyo cyo kohereza.Ikigereranyo cya Frisis Ikoreshwa mukubara imbaraga zakiriwe muri antenne imwe (hamwe ninyunguG1), iyo yandujwe muyindi antenne (hamwe ninyunguG2), bitandukanijwe n'interaR, no gukora kuri frequencefcyangwa uburebure bwa lambda.Uru rupapuro rukwiye gusoma inshuro ebyiri kandi rugomba kumvikana neza.
Inkomoko ya formulaire yo kohereza
Kugirango utangire inkomoko yuburinganire bwa Friis, tekereza antene ebyiri mumwanya wubusa (nta mbogamizi ziri hafi) zitandukanijwe ninteraR:
Dufate ko （） Watts yimbaraga zose zitangwa kuri antenna yohereza.Kuri ubu, fata ko antenne yohereza ari byose, nta gihombo, kandi ko antene yakira iri mumurima wa kure wa antenne yohereza.Noneho ubucucike bw'imbaragap(muri Watts kuri metero kare) yibyabaye byindege kuri antenna yakira interaRkuva antenna yohereza itangwa na:
Igicapo 1. Kohereza (Tx) no Kwakira (Rx) Antenna yatandukanijwe naR.
Niba antenne yohereza ifite antenne yunguka mu cyerekezo cyo kwakira antene yatanzwe na （then, noneho ikigereranyo cyingufu zingana hejuru gihinduka:
Inyungu zigihe cyerekezo mubyerekezo no gutakaza antenne nyayo.Fata noneho ko antene yakira ifite aperture nziza yatanzwe na））.Noneho imbaraga zakiriwe niyi antenne () itangwa na:
Kubera ko aperture nziza kuri antenne iyo ariyo yose nayo ishobora kugaragazwa nka:
Imbaraga zakiriwe zishobora kwandikwa nka:
Ikigereranyo1
Ibi bizwi nka formulaire yo kohereza.Ihuza umwanya wubusa inzira yatakaye, antenna yunguka nuburebure bwumurongo wakiriwe no kohereza imbaraga.Nibimwe muburinganire bwibanze mubitekerezo bya antenna, kandi bigomba kwibukwa (kimwe nibikomoka hejuru).
Ubundi buryo bwingirakamaro bwikwirakwizwa rya Friis butangwa muburinganire [2].Kubera ko uburebure bwumurongo hamwe ninshuro f bifitanye isano numuvuduko wumucyo c (reba intro kurupapuro rwumurongo), dufite formulaire ya Friis yoherejwe muburyo bwa frequency:
Ikigereranyo2
Ikigereranyo [2] cyerekana ko imbaraga nyinshi zabuze kuri frequency nyinshi.Nibisubizo byibanze byikwirakwizwa rya Friis.Ibi bivuze ko kuri antene hamwe ninyungu zisobanutse, ihererekanyabubasha rizaba ryinshi kumurongo muto.Itandukaniro riri hagati yimbaraga zakiriwe nimbaraga zoherejwe zizwi nkigihombo cyinzira.Bavuze muburyo butandukanye, Ikigereranyo cyohereza kwa Friis kivuga ko gutakaza inzira ari byinshi kuri frequency nyinshi.Akamaro k'iki gisubizo kiva muri formulaire yohereza kwa Friis ntigishobora kuvugwa.Niyo mpamvu muri rusange terefone zigendanwa zikora munsi ya 2 GHz.Hashobora kubaho imirongo myinshi yumurongo iboneka kumurongo mwinshi, ariko guhuza inzira bifitanye isano ntibishobora kwakira neza.Nkizindi ngaruka zo Kuringaniza kwa Friss, tuvuge ko ubajijwe antene zigera kuri 60 GHz.Urebye ko iyi frequence ari ndende cyane, ushobora kuvuga ko gutakaza inzira bizaba hejuru cyane kubitumanaho birebire - kandi urakosoye rwose.Kuri radiyo ndende cyane (60 GHz rimwe na rimwe byitwa akarere ka mm (milimetero yumuraba)), gutakaza inzira ni byinshi cyane, bityo rero itumanaho-ry-ingingo rirashoboka.Ibi bibaho mugihe uwakira na transmitter ari mubyumba bimwe, kandi bikareba.Nkindi cyemezo cya Friis Transmission Formulaire, utekereza ko abakoresha telefone zigendanwa bishimiye itsinda rishya rya LTE (4G), rikora kuri 700MHz?Igisubizo ni yego: iyi ni inshuro nke ugereranije na antene isanzwe ikora, ariko duhereye ku kuringaniza [2], twabonye ko gutakaza inzira rero bizaba biri hasi.Kubwibyo, barashobora "gupfukirana ubutaka bwinshi" hamwe niyi radiyo yumurongo, hamwe numuyobozi wa Verizon Wireless aherutse kwita iyi "murwego rwohejuru", mubyukuri kubwiyi mpamvu.Icyitonderwa kuruhande: Kurundi ruhande, abakora terefone ngendanwa bagomba guhuza antenne ifite uburebure bunini bwumurongo mugikoresho cyoroheje (frequency frequency = nini nini nini), bityo akazi ka antenne akazi katoroshye gato!
Hanyuma, niba antene idahuye na polarisiyasi ihuye, imbaraga zavuzwe haruguru zishobora kugwizwa na Polarisation Yatakaye (PLF) kugirango ibaze neza uku kudahuza.Ikigereranyo [2] hejuru kirashobora guhindurwa kugirango habeho uburyo rusange bwo kohereza kwa Friis, burimo guhuza polarisiyasi:
Ikigereranyo3
Igihe cyo kohereza: Mutarama-08-2024
