Patent ID: 7482978

Claim:
A PIFA (planar inverted-F antenna) comprising: a ground plane ( 31 ); a radiating member ( 30 ) including a feed point ( 301 ), a shorting point ( 302 ), a first radiating element ( 303 ) having a first starting point proximate the feed point ( 301 ) and the shorting point ( 302 ), and a first terminating point coiled as a longer path ( 304 ) terminated at an outer edge of the ground plane ( 31 ) and being open for generating a first resonance mode having a low frequency, and a second radiating element ( 305 ) having a second starting point connected to the first starting point of the first radiating element ( 303 ), and a second terminating point extended toward the first terminating point of the first radiating element ( 303 ) to form a shorter path ( 306 ) terminated at the outer edge of the ground plane ( 31 ), the second terminating point of the second radiating element ( 305 ) being proximate the first terminating point of the first radiating element ( 303 ) for generating a second resonance mode having a high frequency; a low frequency medium frequency regulator ( 32 ) located at the first terminating point of the first radiating element ( 303 ) and being perpendicular to the ground plane ( 31 ) for adjusting a resonance frequency of the first resonance mode having a low frequency; a high frequency medium frequency regulator ( 33 ) located at the second terminating point of the second radiating element ( 305 ) and being perpendicular to the ground plane ( 31 ) for adjusting a resonance frequency of the second resonance mode having a high frequency; a substrate ( 34 ); a feed member ( 35 ) having one end connected to the feed point ( 301 ) of the radiating member ( 30 ) and the other end connected to a signal source for signal transmission; and a shorting member ( 36 ) having one end connected to the ground plane ( 31 ) and the other end connected to the shorting point ( 302 ) of the second radiating element ( 305 ).