Planar CPW Fed UWB antenna with dual-band rejection characteristics

摘要

In the proposed paper a coplanar waveguide (CPW)-fed circular patch antenna with notching characteristics is used. A small CPW-fed round shaped patch antenna has designed using FR4-epoxy substrate having dielectric constant of 4.4 having dimensions of 30*30*1.6 mm. By etching out two C-shaped slots notching is achieved at 3.9/5.5 GHz for C-band satellite communication and Wireless Local Area Network (WLAN) respectively. In the proposed work microstrip patch antenna is designed and simulated on HFSS results in impedance bandwidth (S <; -10dB) greater than 120%, stable radiation pattern, and good peak gain. The simulated results are verified using measured results of the fabricated antenna. An effective notching is achieved with gain decreases to -3 dB and -3.4 dB at notching frequencies i.e. 3.9 GHz and 5.5 GHz respectively. Results are compared with the conventional circular patch antenna without notching.