Nā hiʻohiʻona
● Pākahi Wave-alakaʻi Interface
● Haʻahaʻa ʻaoʻao-lobe
● Kiekie Efficiency
● Ke alakaʻi nalu maʻamau
● Linear Polarized
● Kiʻekiʻe hoʻi poho
Nā kikoʻī
RM-SGHA284-15 | |||||
Nā ʻāpana | Hōʻike | Unite | |||
Laulā pinepine | 2.60-3.95 | GHz | |||
Alakai nalu | WR284 | ||||
Loaʻa | 15 ʻAno. | dBi | |||
VSWR | 1.3 ʻAno. | ||||
Polarization | Linear | ||||
3 dB Ka laulaʻa kukui, E-Plane | 32 ° ʻAno. | ||||
3 dB Ka laulaʻa kukui, H-Plane | 31° ʻAno. | ||||
Ikepili | FDP32(ʻAno F) | N-KFD(ʻAno C) | |||
Mea waiwai | AI | ||||
Hoʻopau | Pena | ||||
Nui, ʻAno C | 348.3*199.7*144.8(L*W*H) | mm | |||
Kaumaha | 0.697(ʻAno F) | 1.109(ʻAno C) | kg | ||
Ka Mahana Hana | -40°~+85° | °C |
ʻO ka laina hoʻolaha o ka nalu ultrashort a me ka microwave
ʻO nā hawewe ultrashort, ʻoi aku ka nui o nā microwaves, he mau alapine kiʻekiʻe a me nā lōʻihi hawewe pōkole, a hoʻemi koke ko lākou mau nalu ʻili honua, no laila ʻaʻole hiki iā lākou ke hilinaʻi i nā nalu ʻili honua no ka hoʻolaha lōʻihi.
ʻO nā nalu ultrashort, ʻoi aku ka nui o nā microwaves, hoʻolaha nui ʻia e nā nalu ākea.ʻO ka ʻōlelo maʻalahi, ʻo ka nalu ākea ka nalu e hoʻolaha ana ma kahi laina pololei i loko o ke ākea.ʻIke loa, ma muli o ka curvature o ka honua, aia kahi palena laina-o-sight mamao Rmax no ka hoʻolaha ʻana o ka nalu.ʻO ka wahi i loko o ka mamao ʻike pololei loa i kapa ʻia ʻo ka wahi kukui;kapa ʻia ka ʻāpana ma waho o ka palena ʻike maka pololei ʻo Rmax ka ʻāpana aka.Ke hele nei me ka ʻōlelo ʻole ʻana i ka wā e hoʻohana ai i ka nalu ultrashort a me ka microwave no ke kamaʻilio ʻana, e hāʻule ka wahi e loaʻa ai i loko o ka palena laina-o-ʻike mamao Rmax o ka antenna hoʻouna.
Hoʻopili ʻia e ka radius o ka curvature o ka honua, ʻo ka pilina ma waena o ka palena laina-o-sight mamao Rmax a me ke kiʻekiʻe HT a me HR o ka antenna hoʻouna a me ka loaʻa ʻana o ka antenna: Rmax=3.57{ √HT (m) +√HR ( m) } (km)
Ma ka noʻonoʻo ʻana i ka hopena refraction o ka lewa ma nā hawewe lekiō, pono e hoʻoponopono ʻia ka palena palena o ka mamao o ka ʻike maka i Rmax = 4.12{√HT (m) +√HR (m)}(km) No ka mea he nui ka alapine o nā hawewe electromagnetic. haʻahaʻa ma mua o nā nalu māmā, ka hoʻolaha pono ʻana o nā hawewe lekiō ʻO ka mamao nānā pololei ʻo Re ma kahi o 70% o ka palena mamao nānā pololei ʻo Rmax, ʻo ia hoʻi, Re = 0.7 Rmax.
No ka laʻana, ʻo HT a me HR he 49 m a me 1.7 m pākahi, a laila ʻo ka mamao o ka laina ʻike pono ʻo Re = 24 km.
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