PURPOSE: A dual-band microstrip patch antenna is provided to support the dual band of a WLAN environment by implementing a short circuit and a radiation unit of a pie-shaped. CONSTITUTION: In a dual-band microstrip patch antenna, a radiation unit(130) has a pattern of pie-shaped on a substrate. A feeding unit(140) supplies a current to the radiation unit. The feeding unit is made of a coaxial feeding line. A short circuit(150) is spaced from the feeding unit by 2.4mm. A grounding unit is closely adhered to the bottom of the substrate.
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