Most of the DIY Wi-Fi antenna designs available on the Internet are Yagi antennas. Yagi antennas have been in use consistently since 1928. Yagi antennas were first used for wireless radar and later as TV antennas with the advent of television. Now, with the proliferation of laptops and netbooks, Wi-Fi is hugely popular, and the directionality and relatively low noise of the Yagi design is ideal. Many improvements have been made to the basic "cantenna" design, so now many different size cans, cables and connectors can be used to make an antenna for Wi-Fi

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