Antenna An dibadda 3G-modem - codsiga ah sababaha qalab

Qof kasta oo helay adeegga 3G-modem, si degdeg ah ama goor dambe ayaa wajahaya dhibaato ah ee soo dhoweynta signal saboolka ah. At ay heer hooseeyo caawin kara antenna dibadda ee 3G-modem. Its isticmaalo si weyn u kordhiyaa heerka signal ka helay. Dibadda antenna ee 3G-modem kuu ogolaanaya in dhowr jeer si loo dedejiyo gudbinta macluumaadka asalka ah. Waxay qabtaa flash a. Xaaladdan oo kale, adabtarada aan xiriir ah. Waxay dib-u-dhaadheer doonaa signal ka modem si antenna dibadda iyo qeybsanaan. In uu yahay, nidaamka guud waa sida soo socota: baahida loo qabo in mid ka mid anteeno dibadda 3G-modem iyo cable ka coaxial tayada RF antenna gudaha isagoo Wehliyaha a attenuation yar ee 2100 MHz. Waxaas oo dhan waxa laga iibsan karaa dukaamada qaaska ah, laakiin aad naftaada qalab ah oo dibada ka dhigi kara.

design fudud

antenna Dibadda ee 3G-modem oo aad gacmihiinna - ma ahan adag. Mid ka mid ah Lahjadaha of design tani waxaa la Internet-ka bixiyeen marar badan. Tani anteeno Kharchenko ee 3G-modem. Waxaa sidoo kale loo yaqaan "sideed" waayo qaabka dabeecad. The salaysan waayo, waa waveguide Kharchenko, sideed u eg laba rhombuses, oo qoraaga la soo jeediyey ee la helo janalada taleefishinka kala duwan UHF ah. Si kastaba ha ahaatee, ay la isticmaalo sida signal aqbalana 3G ah yeelan doonaan in ay wax ka bedesho design ka. Waxay kugu caawin doontaa in la xoojiyo signalka haddii ay tahay. Haddii signal GSM ma aha ee guud, waxaa fiican in la isticmaalo jidhka leh oo kala duwan, la aasaasay oo ku saleysan antenna satellite ah. "Sideed" in la sameeyo of copper silig 4mm², oo laga iibsan karaa in wax kasta oo E-dukaanka. From aqbalana silig laaban loop ka. Tani - laba dheeman la dhinac ee 53 mm iyo laba 120 ° xaglo ku rhombuses geesaha kooxda. "Sideed aan la xiran xarunta maamulka Hargaysa ay sida - tiradaasi ah, waxaa jira ah hawada farqiga 5 mm, iyo tani waa muhiim. circuit darafyadiisa xiran yihiin by kabida. sheet Aluminum 2 mm saxan qaro weyn waa in la gooyaa 140x140 mm, taas oo u shaqeyn doonaa sida iftiinta ah. In xarunta of dalool saxan qoday, waayo, cable ka ballaciisu yahay ee 8-10 mm ah. Circuit Jaha ee 36 mm kor ku iftiinta ah. Wuxuu meel jiray inuu la xiriiro isaga la. Waayo, kulankaan laga sameeyey oo dielectric ah. Waxay noqon kartaa caag ah. Haddaba waxaad u baahan tahay in ay go'aan ka sida gidaarka Buur-fursadaha. Waxaad isticmaali kartaa qaybta ka ah saxan satellite. cable antenna waxaa soldered. Waxaa lagu talinayaa in la isticmaalo a cable coaxial 75 Ohm. Si kastaba ha ahaatee, waxa soo baxay siman in marka dhaweynta ruxruxo 2100m Hz ah, taas oo u dhiganta heerka HSDPA, signal xoogga ahbaa sida in markii iska caabin ah ee kor ku xusan 50 ohms isla Geedda. Sidaa darteed waxaa la soo jeediyay in la isticmaalo cable leh impedance ah 50 ohms. silig a noocan oo kale ah waxaa laga yaabaa in gebi ahaanba laga sameeyey naxaas, iyo waa ay fududahay in lifaaq kabida. Qalabka waa in lagu dhejiyaa iyo qotoma meel. Dhamaadka kale ee cable la sameeyaa matcher. Tani waxay u baahan doontaa bireed naxaas ah. bireed Tani waxaa laga heli karaa meel wal oo transformer hore, ama iibsan laga helay tafaariiqle ah. bireed wuxuu ka kooban yahay kiiska ku waani. Mid ka mid ah dhinaca of cover uu ku noqon karo 45 mm. Case ma dhagan fadhiistaan jirka ka mid ah qalabka 3G our.

Waayo, tidcan fiilooyinka u baahan tahay xoogaa yar oo bireed size 27h76 mm ah. soohi waxaa soldered in this piece of bireed daboolaya daboolka, laakiin meelna ma khuseeyaan isaga, oo muhimka ah ee silig waxaa soldered in cover laftiisa. Laakiin sidoo kale waa in aan si toos ah u taabto jidhka modem ah. Dhab ahaantii, antenna dibadda ah 3gG-modem diyaar u yahay qaliin. Hadda oo kaliya u baahan tahay si ay u rights reserved by si fudud u soo jeestay on Buur ee search of dhaweynta signal fiican.