A novel reconfigurable filter antenna with three ports for three dependent switchable\nstates for impulse radio-ultrawideband (IR-UWB)/wireless local area network (WLAN)/worldwide\ninteroperability for microwave access (WiMAX) applications is presented in this paper. Three\npositive-intrinsic-negative diodes, controlled by direct current, are employed to realize frequency\nreconfiguration of one ultra-wideband state and two narrowband states (2.4 GHz and 3.5 GHz). The\ntime domain characteristic of the proposed antenna in the ultra-wideband state is studied, because of\nthe features of the IR-UWB system. The time domain analysis shows that the reconfigurable filtering\nantenna in the wideband state performs similarly to the original UWB antenna. The compact size,\nlow cost, and expanded reconfigurable filtering features make it suitable for IR-UWB systems that are\nintegrated with WLAN/WiMAX communications.
Loading....