A wide-band monopole antenna in combination with a UWB microwave band-pass filter for application in UWB communication system

A filter-antenna configuration for the application for UWB communication system is presented. Firstly, a microstrip transmission line fed monopole antenna for the wide-band (2.65 GHz-8.52 GHz) communication system is designed and Its performance is verified. Secondly, in the place of microstrip transmission line feeding, a planar UWB microwave filter is used and the performance (3.65 GHz-10.16 GHz) of the new filter-antenna configuration is noted. The new filter-antenna configuration considerably improves the antenna performance and wide-band antenna becomes the UWB antenna after the insertion of the UWB microwave filter in place of microstrip-line feeding technique. Hence, the UWB antenna can be used as the wide-band impedance matching circuit to enhance the performance of the antenna in the passband. Apart from this there is improvement in the out-of-band performance. The proposed UWB filter-WB antenna configuration is simple and compact in size providing broadband impedance matching, and consistent radiation pattern within the UWB frequency range.