US Patent 10033100 Floating dipole antenna with recess excitation

A compact wideband RF antenna for placement in a ground-plane recess at the edge of a printed circuit board. Wideband performance is enhanced by an electrically-isolated floating dipole, which electromagnetically couples signal excitation in the recess to a loop dipole formed from the ground-plane. The loop dipole connects to RF circuitry for transmission and reception. Antennas according to embodiments of the invention are capable of UWB operation in the 3.1-10.6 GHz band.