xov tooj cua zaus ntawm 30 MHz txog 299 MHz. Cov sub-bands feem ntau siv los ntawm hluav taws yog: VHF-FM Lo band: Zaus Modulation 30 MHz - 80 MHz, ntawm cov hluav taws kub zaus ntawm 30 MHz thiab 50 MHz.
Tus nqi siab yog dab tsi?
High frequency (HF) is the ITU designation for the range of radio frequency electromagnetic waves (xov tooj cua waves) nruab nrab ntawm 3 thiab 30 megahertz (MHz) Nws tseem hu ua decameter band los yog decameter nthwv dej raws li nws lub wavelengths ntawm ib mus rau kaum decameters (kaum mus rau ib puas meters).
Yuav hluav taws xob twg muaj ntau zaus?
VHF, nyob rau hauv tag nrho cov ntau zaus, conventionally txhais ib feem ntawm lub electromagnetic spectrum nrog rau tej hluav taws xob nrog ib tug wavelength ntawm 1 thiab 10 meters thiab ib tug zaus ntawm 300 thiab 30 megahertz. VHF cov teeb liab tau dav siv rau kev xa xov tooj cua thiab xov tooj cua.
Dab tsi yog siv ntau zaus?
Ntxiv rau VHF tshaj tawm, xov tooj cua muaj suab nrov heev tau siv dav rau nkoj thiab kev sib txuas lus hauv dav hlau, kev tiv thaiv kev puas tsuaj thiab kev tswj hwm xov tooj cua, tub ceev xwm thiab xov tooj cua hluav taws, xov tooj cua, thiab lwm yam kev siv.
Kuv tuaj yeem siv qhov zaus siab qhov twg?
Ntau zaus siab heev (EHF) nthwv dej tuaj yeem nqa cov ntaub ntawv ntau thiab nrhiav kev siv dav hauv radar, hom kev sib txuas lus hauv av yooj yim, thiab kev sib txuas lus satellite.
