A Navel design of UWB Antenna with multiple slots on patch for 5GHz band notch characteristics

Abstract: This paper represents a novel UWB antenna with a band elimination characteristic. In order to obtain band elimination characteristic, Multiple Slot inserted in the rectangular patch and I-shaped strip is inserted inside the I- shaped slot on the rectangular patch. The proposed antenna is designed on a GIL GML substrate with thickness of 0.762 mm and relative permittivity (𝜀𝑟 ) of 3.2. The size of our proposed antenna is 26 × 32 𝑚𝑚2, which results in desirable radiation characteristics. The proposed antenna design with optimal dimensions is fabricated and measured. The measurement shows that return loss is below -10dB within the desired frequency bandwidth from 2.75 GHz to upper 10.8GHz, whereas a notched bandwidth of 5.16 - 5.95GHz is obtained. Far-field radiation patterns and gain of the antenna are also studied in this paper. Good agreement has been found by comparing the results from the measured data and those simulated.

Keywords: Ullra Wide-Band (UWB), Patch, I-shaped slot, Far-field radiation patterns, Return loss.