Nkhani - Mfundo yopezera phindu la mlongoti, momwe mungawerengere phindu la mlongoti

Kupeza kwa mlongoti kumatanthawuza kupindula kwamphamvu kwa mlongoti kumalo enaake okhudzana ndi gwero loyenera.Imayimira mphamvu ya radiation ya mlongoti kumalo enaake, ndiko kuti, kulandira ma siginecha kapena kutulutsa mphamvu kwa mlongoti komweko.Mlongoti akamakwera kwambiri, mlongotiyo umachitira bwino mbali ina yake ndipo umatha kulandira kapena kutumiza ma siginecha bwino kwambiri.Kupindula kwa mlongoti nthawi zambiri kumawonetsedwa mu ma decibel (dB) ndipo ndi chimodzi mwazofunikira pakuwunika momwe tinyanga zimagwirira ntchito.

Kenako, ndikutengerani kuti mumvetsetse mfundo zoyambira zopezera mlongoti komanso momwe mungawerengere phindu la mlongoti, ndi zina zambiri.

1. Mfundo yopezera phindu la mlongoti

Kunena mwamwano, kupindula kwa mlongoti ndi chiŵerengero cha mphamvu yamagetsi yopangidwa ndi mlongoti weniweni komanso mlongoti woyenera wa gwero pamalo ena mumlengalenga pansi pa mphamvu yolowetsa yomweyi.Lingaliro la mlongoti wa point source antenna akutchulidwa apa.Ndi chiyani?M'malo mwake, ndi mlongoti womwe anthu amaganiza kuti umatulutsa ma siginecha mofanana, ndipo mawonekedwe ake a radiation ndi gawo losiyana kwambiri.M'malo mwake, tinyanga timakhala ndi njira zopezera ma radiation (zomwe zimatchedwa kuti ma radiation).Chizindikiro chomwe chili pamtunda wa radiation chidzakhala champhamvu kuposa mtengo wa radiation wa theoretical point source mlongoti, pomwe ma radiation amtundu wina amafooka.Kuyerekeza pakati pa mtengo weniweni ndi mtengo wamalingaliro apa ndikupindula kwa mlongoti.

Chithunzi chikuwonetsaRM-SGHA42-10product model Pezani data

Ndizofunikira kudziwa kuti tinyanga tating'onoting'ono zomwe anthu wamba amawona sizimangowonjezera mphamvu yotumizira, komanso zimawononga mphamvu yotumizira.Chifukwa chomwe chimaganiziridwabe kukhala chopindulitsa ndi chifukwa mayendedwe ena amaperekedwa nsembe, momwe ma radiation amawongolera, komanso kugwiritsa ntchito ma siginecha kumakhala bwino.

2. Kuwerengera phindu la mlongoti

Kupeza kwa mlongoti kumayimira kuchuluka kwa ma radiation okhazikika amphamvu opanda zingwe, motero kumagwirizana kwambiri ndi mawonekedwe a radiation ya tinyanga.Chidziwitso chambiri ndichakuti kucheperako kwa lobe yayikulu komanso kuchepera kwa lobe yam'mbali pamawonekedwe a radiation ya mlongoti, kupindula kumakwera.Ndiye mungawerenge bwanji phindu la mlongoti?Kwa mlongoti wamba, chilinganizo G (dBi) = 10Lg {32000/(2θ3dB, E × 2θ3dB, H)} chingagwiritsidwe ntchito kuyerekezera kupindula kwake.formula,
2θ3dB, E ndi 2θ3dB, H ndi makulidwe a mlongoti pa ndege zazikulu ziwiri motsatana;32000 ndi ziwerengero zoyeserera.

Ndiye zingatanthauze chiyani ngati chotumizira opanda zingwe cha 100mw chili ndi mlongoti wopeza +3dbi?Choyamba, sinthani mphamvu yotumizira kukhala ma sign gain dbm.Njira yowerengera ndi:

100mw=10lg100=20dbm

Kenako muwerengere mphamvu yonse yotumizira, yomwe ili yofanana ndi kuchuluka kwa mphamvu zotumizira ndi kupindula kwa mlongoti.Njira yowerengera ili motere:

20dbm+3dbm=23dbm

Pomaliza, mphamvu yofananira yotumizira imawerengedwanso motere:

10 ^ (23/10)≈200mw

Mwanjira ina, mlongoti wopeza +3dbi ukhoza kuwirikiza kawiri mphamvu yofananira yotumizira.

3. Ma antennas omwe amapezeka

Tinyanga za ma router athu wamba opanda zingwe ndi amnidirectional antennas.Macheza ake pamwamba ndi pa yopingasa ndege perpendicular kwa mlongoti, kumene cheza phindu lalikulu, pamene cheza pamwamba ndi pansi pa mlongoti kwambiri kufooka.Zili ngati kutenga chizindikiro cha mleme ndikuchipalasa pang'ono.

Kupindula kwa mlongoti ndi "mapangidwe" a siginecha, ndipo kukula kwake kumawonetsa kuchuluka kwa siginecha.

Palinso mlongoti wamba wamba, womwe nthawi zambiri umakhala wolunjika.Ma radiation ake pamtunda ali m'dera lofanana ndi fani kutsogolo kwa mbale, ndipo zizindikiro za m'madera ena zimafowoka.Zili ngati kuwonjezera chivundikiro cha kuwala kwa babu.

Mwachidule, tinyanga zolemera kwambiri zili ndi ubwino wotalikirapo komanso mawonekedwe abwinoko azizindikiro, koma amayenera kupereka ma radiation munjira iliyonse (nthawi zambiri amangotayika).Ma antennas opeza pang'ono nthawi zambiri amakhala ndi njira yayikulu koma yotalikirapo.Zinthu zopanda zingwe zikachoka kufakitale, opanga nthawi zambiri amazikonza motengera momwe amagwiritsidwira ntchito.

Ndikufuna kupangira zinthu zina za mlongoti zomwe zimapindulitsa aliyense: