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Wide beam-width antenna based on slot antenna that used microstrip feeding was designed. As using reflector, it was characterized forward direction propagation, and it can convert the backward propagation to forward, so we can achieve more high gain. And we achieve VSWR 2:1 not only 2.4 GHz band but also 5 GHz band, so it can use any wireless-LAN system, its size is 60 mm times 55 mm times 5.8 mm...