A Comb Shape Slot UWB Antenna with Controllable Triple Band Rejection Features for Wimax/Wlan/5G/Satellite Applications

Abstract

Advent of Ultra-wideband (UWB) technology has been flourished the uses of UWB spectrum (3.1-10.6) GHz accredited by the Federal Communication Commission (FCC) for the diversity of short-range applications. The vital challenge is to design a proficient UWB antenna, which will alleviate the Electro-magnetic interference of the UWB spectrum with the coexisting narrowband utilizing band notch appearances. In this research work, a comb slot shape competent UWB antenna proposed with controllable triple-band rejection characteristic for Wimax/WLan/5G/Satellite applications. The antenna has primarily obtained UWB characteristics by defecting the ground structure in a staircase form and triple-band notch features achieved by inserting a comb shape slot on a radiating patch. The comb shape consists of three slots and the deviation of slot length in an exponential order. Moreover, the band notch at 3-3.85 GHz for WiMAX attained by etching topper slot and band notch at 4.5-5.8 GHz, 7-8 GHz achieved via the inclusion of middle slot and bottom slot respectively. Above and beyond, each band notch can be controlled over a range of frequency by customizing the slot dimension. The proposed antenna occupied compact size 35x35x1.6 mm3 and almost 95% average radiation efficiency obtained over the bandpass frequency, while the lowest 20% efficiency attained over the band notch. Furthermore, the proposed antenna has achieved return loss -58 dB as the minimum value and close to -2 dB as maximum value over the UWB as well as band notch frequency respectively. In conclusion, it is noteworthy that the proposed antenna covered the existing research challenge and will perfect antenna tools for upcoming UWB technology.