hat
FM mikwo ond patikilye, segondè frekans, longèdonn a se ti bout tan, pouri anba tè tè vag li yo byen vit, Se konsa, pa konte sou pwopagasyon vag tè sou long distans tan. FM mikwo ond patikilye, sitou nan pwopagasyon nan vag espasyal. Yon ti tan, seri a vag espasyal nan yon direksyon ki espasyal nan yon vag propager sou yon liy dwat. Li evidan, akòz deviation Latè a nan pwopagasyon vag espas ki egziste yon fikse limit nan Rmax a distans. Gade nan distans la pi lwen nan zòn nan, tradisyonèlman li te ye kòm ekleraj zòn; ekstrèm Rmax distans gade deyò zòn nan Lè sa a, li te ye kòm zòn nan lonbraj. San yo pa di ke lang, pou yo sèvi ak ultra vag, mikwo ond kominikasyon, transmèt antèn k ap resevwa pwen ta dwe tonbe nan limit ki nan Rmax ranje optik. Pa reyon an nan deviation sou latè a, ki soti nan Rmax nan limit gade ak transmèt antèn epi ki resevwa HT wotè antèn, relasyon ki genyen ant HR: Rmax = 3.57 {√ HT (m) + √ HR (m)} (km)
eng
FM particular microwave, high frequency, the wavelength is short, its ground wave decay quickly, so do not rely on ground wave propagation over long distances. FM particular microwave, mainly by the spatial wave propagation. Briefly, the spatial wave range in the spatial direction of a wave propagating along a straight line. Obviously, due to the Earth's curvature of space wave propagation exists a limit stare into the distance Rmax. Look at the farthest distance from the area, traditionally known as lighting zone; extreme distance Rmax look outside the area then known as the shaded area. Without saying that language, the use of ultrashort wave, microwave communication, transmitting antenna receiving point should fall within the limits of optical range Rmax. By the radius of curvature of the earth, from the look limit Rmax and transmitting antenna and receiving antenna height HT, the relationship between HR: Rmax = 3.57 {√ HT (m) + √ HR (m)} (km)