Patent ID: 7026993
Filing Date: 2006-04-11
Classification: H01Q

Abstract:
1. A planar antenna comprising a radiating element that radiates electric wave, an earthing conductive plate that reflects the electric wave radiated from said radiating element, said radiating element is formed on one surface of a first dielectric plate, the other surface of said first dielectric plate facing said earthing conductive plate; and having a space between said earthing conductive plate and said radiating element; said radiating element is composed of a central conductive part with a length corresponding to the half wavelength of one of a plurality of transmission radio frequency signals with different frequencies, and conductive parts with a length corresponding to the half wavelength of the other of said plurality of transmission radio frequency signals, said central conductive part and said conductive parts being formed into one body such that said conductive parts are located self-symmetrical to said central conductive part.