Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

RF amplification

  1. Apr 14, 2010 #1
    My home is about 1.2KM LOS from work. I wanna use my work's internet connection at home. I have a pole available as well. Right now from rooftop to rooftop, I do get a signal but it's weak and goes off sometimes. I'm using a 200MW wifi bridge. So at a recommendation of a friend, I got a 1watt amplifier to stay license free. It is a 2 way amp also adding 10dbi to the receive sensitivity. The manufacturer says it's linear, giving me 1 watt with 200mw input. The issue however is that with the amp, reception and speed gets even worse..... I tried reducing my power to 100mw which would reduce the output of the amps as well but no luck. The performance is worse with the amp and directional antennas than with no amp and 9db omnis.
    Anyway since I haven't been able to make it work, I got a new 1 watt bridge and that works very well. I'm getting 38mbps throughput and a full RSSI indicator with dishes on both rooftops.

    The question, is this a bad amp, or trying to use RF amps is generally a bad idea? It's funny how the stock 1watt bridge works like a charm, but the amplified one doesn't at all even tho they're both built around the same atheros chip. I guess a 2 way amp also amplifies noise?
  2. jcsd
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted