Inverted C-Shaped Slots Loaded Exponential Tapered Triple Band Notched Ultra Wideband (UWB) Antenna

TL;DR

This paper introduces a simple exponentially tapered triple-notched UWB antenna that effectively rejects Wi-MAX, WLAN, and X-band signals while maintaining ultra-wideband performance.

Contribution

It presents a novel design with inverted C-shaped and U-shaped slots for band rejection, minimizing cross-coupling and ensuring reliable performance.

Findings

Successfully rejected Wi-MAX, WLAN, and X-band frequencies

Achieved reliable ultra-wideband operation with band notches

Validated through simulation and measurement results

Abstract

This research presents a simple strategy for designing an exponentially tapered, triple-notched ultrawideband antenna. The antenna's microstrip line feed and radiating patch are matched using an exponential tapered transformer. This method inserts antenna notch elements, by cutting two inverted C-shaped slots in the radiating patch; frequency rejection can be achieved for WI-MAX and wireless LAN. The X-band is rejected by etching a U-shaped slot in the feedline. When embedding the notch elements, cross-coupling was minimized. The desired antenna was designed, simulated, and measured. The measured results and graphs show that our proposed design is reliable. This band notched antenna rejects 3.5 GHz (Wi-MAX band, 3.3 to 3.7 GHz), 5.5 GHz (WLAN 2 band, 5.15 to 5.825 GHz), and 7.5 GHz (for satellite downlink X - band-7.25 GHz to 7.75 GHz). The proposed antenna meets UWB design requirements.