In the upper portion of the band, waves can be focused or collimated by dishantennas of modest size.
上部的乐队，可以聚焦波浪或平行的中等大小的碟形天线。
2
Wireless alternatives avoid the cost of digging up streets but require technicians to mount and carefully orient dishantennas.
无线的选择避免挖出街的费用但是要求技术员增长并且小心地东方盘子天线。
3
The Allen Telescope Array (mostly paid for by Paul Allen, co-founder of Microsoft) consists of 42 dishantennas, each six metres across, scattered across the countryside.