Conical Shape Antenna With Circular Slots for Ultra Wideband Applications
UWB is an emerging wireless technology for commercial high-data-rate, short-range communications, radar systems, and measurement. The technology can be used within an ultra-wide spectrum but with an extremely low emission power level. For example, in 2002 the Federal Communications Commission (FCC) regulated the emission limits of 4 -3 dBm/MHz for an allocated spectrum ranging from 3.1 GHz to 10.6 GHz. In future, universal antenna solutions completely embedded into portable devices are desirable, which may cover frequencies from 800MHz to 11 GHz or above in order to include all the existing wireless communication. Two antenna designs for Ultra Wideband 3.1-10.6 GHz communication are introduced. The primary antenna design is an equiangular spiral slot patch antenna with an outer radius of 2.25 cm.