Typical Wireless Network Adaptor Question

By Kevin16
Aug 20, 2005
  1. Hi Guys

    Does anyone know what the approx. gain on a typical cardbus wireless network adaptor (no external antenna) is?

    I'm asking this because I am planning on buying a new antenna with a higher gain.

  2. nein

    nein Banned Posts: 109

    The maximum FCC permited transmit power is +15dBm, coupling to an impedance matched antenna caused 50% power loss which is -3db down. Most standard built-in antennas are 2dBi to 4dBi and brought the aparent radiated transmit power back to normalize maximum.
  3. HoopaJoop

    HoopaJoop TS Rookie Posts: 90


    Additionally you may want to stay with the B/G 2.4ghz standard as you can attach an external antenna (on some models) and signal gain equipment. I don't know the specifics of it, but the 5ghz band ones (such as 802.11A) can't be modded like that per FCC. It's one of the reasons the old 802.11B Orinoco cards are so popular still.
  4. Kevin16

    Kevin16 TS Rookie Topic Starter Posts: 92

    Thanks guys thats all i needed to know.
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