Dual Slot Band Notch Rectangular Shape Microstrip Patch Antenna for UWB Applications

Abstract

Introduction: A small Ultra-Wideband (UWB) microstrip antenna with and without band-notch properties are presented in this paper. By incorporating dual slot notches, the proposed antenna is designed to selectively reject interference from WLAN and WiMAX bands while operating efficiently over the 2-12 GHz frequency range. The antenna without a notch performs exceptionally well over the intended UWB range, with a wide impedance bandwidth of 3 GHz (9-12 GHz) and S₁₁ values of −21 dB and −24 dB. With S11 values of −18.0 dB, −12.0 dB, −29.0 dB, and −11.0 dB, respectively, four band-stop regions are successfully introduced in the notched configuration at 2.3-3.2 GHz, 5.4-6.2 GHz, 7.4-9.0 GHz, and 9.1-10.2 GHz. Simulated results are in good agreement with measured results. The generated antenna maintains a Voltage Standing Wave Ratio (VSWR) below the value two and attains a measured input impedance of about 34.78 Ω. The size of proposed antenna is (50 mm × 50 mm × 1.6 mm) that has stable omnidirectional radiation characteristics, and efficient ground plane design makes it suitable for modern portable UWB communication systems. The results demonstrate that the proposed slot-based approach provides a practical and effective means of lowering interference in UWB applications