Nature inspired tree shaped antenna with dual band notch for UWB applications

This literature demonstrates the study of design and parametric characterization of a tree shaped microstrip patch antenna with dual band notch characteristic for Ultra wideband (UWB) applications. This proposed design is characterized by an enhanced impedance bandwidth of 2.2–19.5 GHz (159% Percentage bandwidth) with dual band notch characteristic at Wi-MAX band (3.3–3.7 GHz) and upper WLAN band (5.15–5.85 GHZ). The wide impedance bandwidth is achieved by using a special tree shaped radiator with modified front and back ground plane. The band rejection in wireless local area network (WLAN) band is achieved by etching a Rectangular Split Ring Resonator (RSRR) structure in the radiator part and for Wi-MAX, a Spiral shaped Defected Microstrip Structure (SDMS) in the feed mechanism. The overall dimensions of the proposed antenna are 28 × 35 × 1.6 mm3. The antenna is characterized by high gain (about 7.5 dB max) in the entire operating frequency band except the notched frequency bands. The simulated and the experimental results are in good agreement. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:1658–1661, 2016