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A dual band microstrip antenna including a slotted microstrip radiating parallel to and spaced from a ground plane with dielectric material therebetween, the slotted microstrip radiating and having a first resonance corresponding to the dominant radiation mode that would occur in an unslotted micros

A dual band microstrip antenna including a slotted microstrip radiating parallel to and spaced from a ground plane with dielectric material therebetween, the slotted microstrip radiating and having a first resonance corresponding to the dominant radiation mode that would occur in an unslotted microstrip and a second resonance created by the slot. The polarizations of the two resonances are perpendicular to each other with the slot resonance being polarized along the centerline of the slot.

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A dual-band microstrip antenna comprising: (a) a thin dielectric substrate; (b) a thin conductive layer disposed on one surface of said substrate, said conductive layer forming a ground plane; (c) a thin conductive slotted radiating element disposed on the other surface of said substrate, said radia

A dual-band microstrip antenna comprising: (a) a thin dielectric substrate; (b) a thin conductive layer disposed on one surface of said substrate, said conductive layer forming a ground plane; (c) a thin conductive slotted radiating element disposed on the other surface of said substrate, said radiating element having a first resonance corresponding to the dominant radiation mode that would occur in an unslotted radiating element otherwise identical to the slotted radiating element, said radiating element having a first slot disposed in an area of the radiating element away from the main current path of the radiating element\s dominant mode, said radiating element having a second resonance created by said first slot; and (d) a single microstrip feedline for coupling radio frequency signals to said slotted radiating element, said single feedline being coplanar with said slotted radiating element.