Ivela phi iSignali yeSelfowuni?

Umbuzo 1. Ivela phi isignali yefowuni ephathwayo?
Ndikholelwa ukuba abantu abaninzi baye beva ngala magama mabiniisikhululo sesiseko okanye isikhululo semiqondiso (inqaba), kodwa eneneni zizinto enye. Isignali yefowuni ephathwayo idluliselwa ngale nto siyibiza ngokuba sisikhululo sesiseko.

Umbuzo 2. Yintoni i-electromagnetic wave?
Ngamafutshane, amaza e-electromagnetic ngamaza e-particle ajikelezayo aphuma aze akhutshwe esibhakabhakeni ngamacandelo ombane kunye ne-magnetic akwisigaba kwaye ajikeleze omnye komnye. Ziindawo ze-electromagnetic ezisasazeka ngendlela yamaza kwaye zine-wave-particle duality. Isantya sokusasazeka: isantya senqanaba lokukhanya, akukho medium yokusasazeka efunekayo (Iwave yesandi idinga medium). Amaza e-electromagnetic ayafunxwa kwaye abonakale xa edibana nesinyithi, kwaye abuthathaka xa evalwe zizakhiwo, kwaye abuthathaka xa kukho umoya, imvula kwaye iduma. Okukhona ubude bomda bufutshane kwaye amaza e-electromagnetic aphezulu, kokukhona idatha idluliselwa ngakumbi ngexesha ngalinye.

Umbuzo 3. Singayilungisa njani isignali?
Okwangoku kukho iindlela ezimbini. Enye kukwazisa umqhubi wakho ukuba isignali yendawo ayilunganga, kwaye isebe lokwenza ngcono inethiwekhi liza kuya kuvavanya amandla esignali. Ukuba amandla esignali awahlangabezani neemfuno, umqhubi uza kwakha isikhululo sesiseko apha ukuphucula inethiwekhi yakho.

Enye kukusebenzisa i-amplifier yesignali yefowuni ephathwayo. Umgaqo wayo kukusebenzisa i-antenna ehamba phambili (i-antenna yabanikeli) ukuze ufumane i-downlink signal yesikhululo sesiseko kwi-repeater, yandise isignali eluncedo nge-amplifier yengxolo ephantsi, icinezele isignali yengxolo kwisignali, kwaye iphucule i-signal-to-noise Ratio (S/N); emva koko iguqulwe iye kwisignali ye-frequency ephakathi, ihluzwe yi-filter, inyuswe yi-frequency ephakathi, ize itshintshelwe kwi-frequency kwaye inyuswe iye kwi-radio frequency, inyuswe yi-power amplifier, kwaye idluliselwe kwisikhululo seselula yi-antenna engasemva (i-antenna ephinda ithunyelwe); Kwangaxeshanye, isignali ye-uplink yesikhululo seselula ifunyanwa yi-antenna engasemva, kwaye icutshungulwe yi-uplink amplification link ecaleni kwendlela echaseneyo: oko kukuthi, idluliselwa kwisikhululo sesiseko nge-amplifier yengxolo ephantsi, i-down-converter, i-filter, i-intermediate amplifier, i-up-converter, kunye ne-power amplifier, ngaloo ndlela ifezekisa unxibelelwano oluphakathi kwesikhululo sesiseko kunye nesikhululo seselula.

Izikhulisi zesignali zefowuni eziphathwayo zingasetyenziswa kwiindawo ezixineneyo zasezidolophini, kwiindawo zasezidolophini nakwiindawo ezikufutshane, nakwiindawo zasemaphandleni. Zilula kakhulu. Loluphi ukhetho olukhethayo?

ILinchuang lishishini lobuchwepheshe obuphezulu elisebenzela abasebenzisi abangaphezu kwesigidi kumazwe ali-155 nakwiindawo zehlabathi liphela. Kwicandelo lonxibelelwano lweselula, sigxininisa ekuphuhliseni ngokukhutheleyo iimfuno zabathengi ukunceda abathengi basombulule iimfuno zesignali yonxibelelwano! ILinchuang izibophelele ekubeni yinkokeli kushishino lokunciphisa iisignali ezibuthathaka, ukuze kungabikho mabala angabonakaliyo ehlabathini, kwaye wonke umntu akwazi ukunxibelelana ngaphandle kwemiqobo!