1
Brian G Westfall, Kevin B Stephenson: Antenna with ground plane having cutouts. Trimble Navigation, Donald S Cooper & Dunham Dowden, November 16, 1999: US05986615 (41 worldwide citation)

An antenna structure has a radiating element and a ground plane. The ground plane has a central region relatively closely spaced apart from the radiating element and a peripheral region extending away from the central region. The peripheral region comprises at least the conductive layer that extends ...


2
Brian G Westfall, Kevin B Stephenson: Antenna with stepped ground plane. Trimble Navigation, Donald S Dowden Esq, Cooper & Dunham, January 11, 2000: US06014114 (28 worldwide citation)

An antenna structure has a radiating element and a ground plane. The ground plane has a central region relatively closely spaced apart from the radiating element and a peripheral region extending away from the central region. The peripheral region comprises at least one conductive layer that extends ...