The present invention relates to a multi-U- slot microstrip patch antenna, and a ground substrate; Forward U- slot and two reverse U- slot is formed with a patch (Patch) arranged respectively in the forward-U- slot at both ends; Are laminated between the grounded substrates and the dielectric layer and coupled to the patch; The outer conductor is grounded to the substrate, the inner conductor comprises a coaxial line for transmitting and receiving signals in a particular frequency band at the same time supplying the signal to said ground substrate are each connected to the patch, wherein the forward slot and two U- The thickness of the reverse U- slot, the length and the reflection coefficient according to the position change thereof, of 5.15 ~ 5.35GHz frequency band required by the present invention by measuring a reflection coefficient according to the reflection coefficient according to the position change of the coaxial line, the thickness of the dielectric layer operable to obtain the multi-U- slot microstrip patch antenna in 5.15 ~ 5.35GHz band plan to new in the International Telecommunication Union (ITU) by applying them to obtain optimized parameters to obtain the antenna.
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