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My connections sporadically drop, even with using HGA7T!

Discussion in 'Networking Issues' started by MZ, Aug 3, 2004.

  1. MZ

    MZ Network Guru Member

    :?: Greetings. I have a WRT54G Linksys Wireless Router. My computer that accesses the router has a WMP54G PCI card. My laptop that also accesses the router has a WPC54G PCMCIA card. I also just purchased -and- installed the HGA7T TNC booster antennas for my wireless router.

    My router is in our upstairs office (since our Cable connection feeds in there). My computer and laptop are downstairs, not far away. Before I had the HGA7T booster antennas connected to my router, I would get a "Low" connection and several dropoffs. Same goes for my computer and Laptop. Then I installed the HGA7T antennas. No difference, sadly.

    Does anyone know if having a wireless router "above" a computer, laptop, etc. have any negative effect for the connection? Should the router always be below the computers that access it?

    Please help!


  2. rich

    rich Network Guru Member

    have you experimented with the orientation of the antennas?
  3. tnelson

    tnelson Guest

    As Rich suggest, I would try orienting the antennas to a more horizontal plane. This should help some, especially with the 7bd antennas you are using.

    Even though the HGA7T are called omni directional, the actual radiation pattern is not truly omnidirectional, that is radiating out in all directions from the antenna. Imagine a perfect omni as having a radiation pattern that looks like a ball, with the antenna at the middle of the ball. At any point equal distance from the antenna, regardless of direction, up, down, sideways, you will have the same signal strength. Antennas that provide gain do so by modifying the radiation pattern to favor one or more directions over others. In essence, the antenna is radiating the same amount of power, but is focusing it in one or more directions, thus increasing the power of the signal in the focused direction.

    In the case of the HGA7T the vertical portion of the signal is reduced and direct more towards the horizontal plane. In effect, the ball pattern of radiation starts to look more like a donut (without the hole in the center). By orienting the antenna towards the horizontal, you cause the majority of radiation to be directed up and down, instead of side to side. This may help increase your signal to the floor below you.

    Also, since the WRT54G(s) uses both antennas in a diversity approuch, that is the WRT picks which antenna is receiving the strongest signal and uses that one for each transmission, you can keep one antenna orienting vertically and change the other one to horizontal. This will help ensure broad coverage both to the sides and up and down.

    So, play around with the antenna orientation, but also remember that material such as walls and floors and ceiling can have dramatic effects on signal strength and radiation patterns. You may also find that moving the WRT to another location, even in the same room, may produce a better signal in the location downstairs.

    Tom N.

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