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I just saw one of these antennas, and I'm puzzled a bit by it. Why would one choose to use a parabolic wire antenna instead of a solid parabolic antenna? It would seem to be much less efficient at first glance (although I don't know if it is true or not). And how do the wire elements manage to steer the energy to the focal reflector in the horizontal plane in the figure below? I understand how the first reflection works for a standard solid parabolic reflector, but how do the wire elements reflect energy inward toward the focal reflector?
http://m.bectrade.com/p/98/6498_Sell_WiFi_24_dBi_Grid_Parabolic_Antenna.jpg
http://m.bectrade.com/p/98/6498_Sell_WiFi_24_dBi_Grid_Parabolic_Antenna.jpg
http://m.bectrade.com/p/98/6498_Sell_WiFi_24_dBi_Grid_Parabolic_Antenna.jpg
http://m.bectrade.com/p/98/6498_Sell_WiFi_24_dBi_Grid_Parabolic_Antenna.jpg
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