Ultra-wideband planar inverted FF antenna

A novel, miniaturised, planar inverted FF antenna (PIFFA) assembly is presented. The antenna design electromagnetically couples two PIFA antennas on an air substrate, and employs a broadband rectangular plate feeding mechanism to achieve an ultra-wideband characteristic. The dimensions of the complete prototype assembly are 30 ?? 15 ?? 8 mm. Good agreement is obtained between computed and measured impedance bandwidths over the range 3.1-10.6 GHz for |S₁₁| < - 10 dB. The simulated and measured gain and radiation patterns are given also, to fully describe the antenna performance.