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I am currently upgrading the wifi system in a large manor, I have upgraded the router to a dlink 2100ap with a 1W signal amp to a 10dbi antenna, the dlink 2100ap only uses one antenna so the tx and rx signals should be broadcasted through the one antenna. Computers/tablets should not have issues getting the signal, but will they have issues sending signals back? They should be able to reach?

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Getting signals back will mostly depends on the power of client radios. At 1 W (are you sure it's 1 W? The specifications for the device list 32 mW as maximum transmit power) plus 10 dBi antenna, I think that a number of smaller devices will have problems reaching the AP, since large number of devices in the 2.4 GHz range can't transmit more than 100 mW. As for the single antenna I expect that problems will mostly be related to speed. –  AndrejaKo Dec 15 '12 at 9:45
    
it goes from the router to an external signal amp to the antenna, the signal amp steps up the routers antenna power, it has a transmit gain of 20 dB to create a 30dBm (1W) power output. –  Jason Dec 15 '12 at 9:51
    
also the speed isnt really the issue, I am in south africa, so the best average internet speed we can get from our ISP is about 400-500 kb/s, i just need there to be full bars on the wifi connection at all times –  Jason Dec 15 '12 at 9:53
    
Well in that case I think that the main problem could be the devices reaching the router. Have you done a site survey of some kind? If the set-up is ready, then the least you can do would be to take a device which would be used with the AP and go away from the AP until the device can barely detect it. Then try communication. I don't think that a single antenna is going to be an issue here since speed doesn't matter. The communication is going to be half-duplex anyway and the improvement of having multiple antennas would be lost on a 802.11g unit anyway as far as speed is concerned. –  AndrejaKo Dec 15 '12 at 9:56
    
I have not bought the equipment yet, as of now, the whole place is running on wifi repeaters (which are broken), I have done a survey for the repeaters, but that doesnt give me any idea on how the antenna will compare. I was considering getting a 12 dbi antenna, would that help the tx rx at all? The complex has some thick walls. –  Jason Dec 15 '12 at 10:04
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