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6. The repeater system
Donor Antenna
：
5~7dbi outdoor panel or 7~9dBi wide band Yagi are recommended as donor antenna.
Function: Pick up donor signals from the BTS and send to the repeater by cable; the received
signals’ power level and quality influence a lot on the coverage effect. Donro antenna also
transmit the uplink signals from the repeater to BTS.
Server Antenna:
2~3dBi indoor omni ceiling or 5~7dBi indoor panel are recommended.
Omni antenna (Indoor ceiling omni antenna or whip antenna), suitable to installed in the center
and radiate all direction; It is better to use a directional panel antenna or Yagi when the coverage
shape is long and narrow (corridors, long row of houses in two sides, tunnels or elevators or rural
open space)
Cables:
LMR 300 or 400, 5D or 8D –FB coax cables are recommended.
Splitters or couplers:
when the building structure is too complicated or there is big loss due to thick
walls, etc., splitters or couplers shall be used so that more antennas can be installed in more areas
to distribute the signals to each corner of the coverage area.
Power Box
including electricity meter, air switch and groundings, some sites might need surge
arrestors.
