US Patent 10135119 Smart antenna and wireless device having the same

A smart antenna comprises a dipole antenna, a first reflector unit, a first diode, a first RF choke unit and a second RF choke unit. The dipole antenna has a first radiating portion and a second radiating portion. The first radiating portion is used for feeding an RF signal and a DC voltage signal controlling the conduction status of the first diode simultaneously. The first reflector unit is disposed on a first side of the dipole antenna and parallel to the dipole antenna. A first section and a second section of the first reflector unit are electrically connected by the first diode. The first RF choke unit is electrically connected between the first radiating portion and the first section of the first reflector unit. The second RF choke unit is electrically connected between the second radiating portion and the second section of the first reflector unit.