Envy News has posted a feature about using Uni- and omni-directional antennas to increase wireless range

Let me guess, you were all pumped for converting your home LAN to WiFi, and now your signal to the wireless access point isn't as strong as you would have liked? Are you shifting your router around, repositioning your PC or laptop's antenna every few hours, or you now run the AP in the same room as the network device? Not everyone is in your boat, but quite a few homes these days - and offices - appear to shield or scramble the signal worse than others. This short but concise feature article details to you how, with the use of two SMC products, you can improve your WiFi
reception.

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