hat
Dirèkteman iradyasyon pa se transmèt radyo antèn pwen an resepsyon yo rele vag an dirèk; transmèt antèn nan vag yo radyo ki emèt montre nan tè a, pa tè a reflete vag rive nan ki pwen an ap resevwa yo rele vag la reflete. Klèman, pwen an siyal resepsyon yo ta dwe vag nan dirèk ak sentèz la vag reflete. Sentèz nan vag pa tankou 1 + 1 = 2 kòm senp sòm aljebrik nan rezilta ak vag sentetik dirèk ak vag reflete diferans ki chemen ant ond yo diferan. Diferans chemen Vag se yon miltip enpè nan yon longèdonn mwatye, vag an dirèk ak siyal la vag reflete, fè sentèz maksimòm a; diferans chemen vag se yon miltip nan longèdonn a, vag an dirèk ak reflete vag siyal soustraksyon a, sentèz se minimize. Wè, nan prezans nan refleksyon tè, se konsa ke distribisyon an espasyal nan entansite a siyal vin byen konplèks.
eng
Directly irradiated by the transmitting antenna radio reception point is called the direct wave; transmitting antenna of the radio waves emitted pointing to the ground, by the ground reflected wave reaches the receiving point is called the reflected wave. Clearly, the reception signal point should be the direct wave and the reflected wave synthesis. Synthesis of wave not like 1 +1 = 2 as simple algebraic sum of results with synthetic direct wave and the reflected wave path difference between waves differ. Wave path difference is an odd multiple of a half wavelength, the direct wave and the reflected wave signal, to synthesize the maximum; wave path difference is a multiple of the wavelength, the direct wave and the reflected wave signal subtraction, synthesis is minimized. Seen, the presence of ground reflection, so that the spatial distribution of the signal intensity becomes quite complex.