Yagi Antenna - An antenna for wireless with a series of antenna elements placed along a metal rod. As a highly directional antenna, yagi antennas are intended to send or receive a propugated radio signal on the same axis as the corresponding antenna on the other end (with line-of-sight visibility between the two whenever possible). While omni-directional antennas are great for short range broadcasts because of their versatility, high gain directional antennas are recommended for most long range wireless video applications.
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