Compact UWB planar antenna with WLAN band rejection using complementary split resonator

In this paper a new form of Ultra Wide Band (UWB) antenna with band rejection characteristic is proposed. The proposed antenna is the combination of a rectangular and a triangular patch with a half ground plane with a slot in it. A complementary Split Ring Resonator (CSRR) which acts as an anisotropic filter structure is slotted along the feed of the antenna in order to achieve certain band notch characteristics. The antenna is designed on a 26.4 mm × 28.05 mm FR4 EPOXY substrate of thickness 1.5 mm. The antenna was observed to be operating from 3.1 to 10.1 GHz with a band notch from 5.3 to 5.8 GHz which envelopes the 5.5 GHz WLAN band. Also the effect of shifting the notch frequency band by changing the dimensions of the CSRR is discussed. The simulation was done using the Ansys HFSS v2015.01.