Ua ntej, peb yuav xav tau ib lub balun siv cov kab sib npaug lossis cov kav hlau txais xov sib npaugnyob rau hauv txhua rooj plaub raws li xov tooj cua niaj hnub no tsis nthuav tawm cov khoom sib npaug. Cov ntsiab lus tom ntej no yog cov txiaj ntsig uas ib qho ze ntawm cov khoom muaj nyob rau ntawm cov khoom noj sib npaug, cov phab ntsa, cov tuam tsev feem ntau, cov yees, tag nrho cov khoom hlau, hauv av, txhua yam!
Yuav ua li cas yog tias koj tsis siv balun?
Kev siv lub balun yuav tiv thaiv kev coax radiating txhua lub zog lossis tuaj yeem ua suab nrov. Hauv ntau qhov xwm txheej nws muaj peev xwm ua haujlwm tau zoo ntawm dipole yam tsis muaj ib qho, tab sis tej zaum yuav muaj kev cuam tshuam me ntsis yog tias tsis siv.
Kuv puas xav tau ib lub pob kom tau txais?
Yes, koj xav tau balun. Ib qho yooj yim quarter-wave dipole yog sib npaug, coax cable tsis yog. Koj qhov teeb meem tam sim no yog qhov sab nraud ntawm lub coaxial cable ua haujlwm zoo li ib feem ntawm lub kav hlau txais xov, ntxiv lossis rho tawm ntawm lub teeb liab thaum koj txav mus ncig.
Thaum twg kuv yuav tsum siv lub kav hlau txais xov?
Baluns tau siv ntau thaj chaw rau kev hloov pauv ntawm qhov sib npaug & tsis sib npaug: ib cheeb tsam tseem ceeb yog rau xov tooj cua zaus, RF daim ntawv thov rau kav hlau txais xov. RF baluns yog siv nrog ntau lub kav hlau txais xov thiab lawv cov feeders los hloov cov khoom noj sib npaug lossis kab mus rau qhov tsis sib npaug.
Vim li cas peb thiaj xav tau balun?
Lub tshuab hloov pauv no yog lub npe hu ua balun, thiab lawv tau ua haujlwm hauv txhua yam ntawm cov xov tooj mus rau cov khoom xa tawm. Baluns yog siv ob qho tib si los txheeb xyuas qhov ntws ntawm AC cov cim thiab ua qhov tsim nyog impedance hloov pauv ntawm coaxial cable, uas muaj qhov qis impedance, thiab cov khoom sib npaug, uas muaj impedances siab dua.
