Tus kav hlau txais xov turnstile tau tsim los ntawm engineer George Brown ntawm RCA hauv xyoo 1935. Qhov piv txwv no muaj 6 qhov sib tw "bays" ntawm 70 ko taw mast. Txhua "bay" muaj ob qhov hla 3.6 meter dipole uas tau tsav cov ntsiab lus, pub rau hauv quadrature (nrog rau 90 ° theem sib txawv).
Thaum twg tus kav hlau txais xov tig tau tsim?
In 1936 nws tau tsim lub "turnstile" kav hlau txais xov, uas tau los ua tus qauv rau TV thiab zaus-modulated (FM) xov tooj cua tshaj tawm.
kav hlau txais xov turnstile ua dab tsi?
Turnstile kav hlau txais xov muaj cov qauv hluav taws xob omnidirectional nrog kab rov tav polarization. Lawv feem ntau ua haujlwm ntawm VHF thiab UHF zaus ntawm 30 MHz txog 3 GHz. Lawv feem ntau siv rau FM & TV tshaj tawm, kev siv tub rog thiab kev sib txuas lus satellite dav dav
antenna canted yog dab tsi?
Tus kav hlau txais xov turnstile muaj plaub lub kav hlau txais xov monopole ua ke hauv ib lub phasing network thiaj li tsim tau ib lub kav hlau txais xov polarized. Tus qauv kav hlau txais xov yog yuav luag omnidirectional thiab tsis muaj qhov muag tsis pom kev uas tuaj yeem ua rau fading nrog tumbling satellites.
Dab tsi yog turnstile array?
Kev Tsim Kho & Kev Ua Haujlwm ntawm Turnstile Kav hlau txais xov
Ob tus tib ib nrab-yoj dipoles tau muab tso rau ntawm lub kaum sab xis rau ib leeg thiab tau noj inphase. Cov dipoles zoo siab 90 ° tawm ntawm theem nrog ib leeg. Turnstile array kuj tuaj yeem raug hu ua crossed dipoles array …
