[Show abstract][Hide abstract] ABSTRACT: A new compact tapered microstrip monopole-like slot antenna for ultra-wideband (UWB) applications is proposed and studied both numerically and experimentally. The antenna is similar to the conventional microstrip monopole-like slot antenna; however, by introducing a tapered slot, UWB performance may be obtained. The dimensional parameters of the antenna and the corresponding current distribution on the conductor surface of the antenna are investigated numerically first. Based on numerical results, some prototypes are designed, fabricated and measured. The properties of the antenna, including return loss, radiation patterns and gain have been investigated experimentally again in order to confirm numerical results. Furthermore, the performance for the antenna when mounted in a handset is also investigated experimentally. As is reported, the operation bandwidth of the antenna is from 2.91 to 12 GHz, which is over 4:1. Relative omnidirectional and constant radiation patterns can be obtained over the entire bandwidth
[Show abstract][Hide abstract] ABSTRACT: A novel frequency notched ultra-wideband (UWB) fractal printed slot antenna is proposed. The antenna is similar in configuration to a conventional microstrip-fed wide slot antenna, however, by introducing a Koch fractal slot, not only the size of the antenna is reduced significantly but also frequency notched function is achieved. Several properties of the antenna such as impedance bandwidth, frequency notched characteristics, radiation patterns and gain, have been investigated numerically and experimentally in detail. As will be seen, the operation bandwidth of the antenna is from 2.85 to 12GHz, in which a frequency notched band from 4.65 to 6.40GHz may be achieved, and relatively stable, omnidirectional radiation performance over the entire frequency range has also been obtained.
[Show abstract][Hide abstract] ABSTRACT: A new frequency notched ultra-wideband microstrip slot antenna with a parasitic tuning stub is proposed. The antenna is similar in configuration to a conventional microstrip slot antenna; by introducing a parasitic open-circuit tuning stub, flexible frequency notched function is achieved. Several properties of the antenna, such as frequency notched function, antenna transfer function and gain, have been investigated. As is reported, the operation bandwidth of the antenna is 2.91-11.16 GHz, in which a frequency notched band of 5.10-5.85 GHz has been achieved. Furthermore, good ultra-wideband linear transmission performance over the entire operation frequency range has also been achieved.