Design ultra-wideband antenna 800–2400 MHz for cognitive radio applications

Public, demand for wireless communications in recent years is increasing very rapidly so that a reliable and cheap telecommunication facilities make people become easier to communicate. Therefore, the information can be transmitted from communication voice began to change towards data and multimedia. But the availability of frequency spectrum is inversely proportional to the needs of society. To meet the needs of the high community of wireless telecommunications facilities, then the greater the bandwidth required. However, most of the frequency spectrum already allocated a user or a particular service. Still sparse availability of this type of antenna that is capable of supporting cognitive radio technology because of low bandwidth. In studies using an electromagnetic simulator to design and simulate ultra wide band (UWB) microstrip antenna with a coplanar waveguide for Cognitive Radio application that can be used at a frequency of 800–2400 MHz. Results of the antenna design work of frequency 800–2400 MHz with omnidirectional radiation pattern; gain > 3dBic; input impedance = 50 Ω and VSWR < 2.0.