Design of dual notch band UWB printed monopole antenna using electromagnetic‐bandgap structure

Abstract

ABSTRACT In this letter, a printed hexagonal monopole antenna with dual band rejection is presented. The dual band rejection is achieved by electromagnetic band gap (EBG) structures. An equivalent‐circuit model is adopted to investigate the stop band characteristics of the EBG. The detailed parametric study of the antenna is presented and discussed. The input impedance and surface current distributions are used to analyze the effects of these EBG. The prototype and proposed antennas are fabricated and tested. The impedance, radiation characteristics, and gain are presented and discussed. From the measured results, the proposed antenna operates over 3.11–10.6 GHz range, for 2 ≤ VSWR, while the dual band stop function is in the frequency bands of 3.3–3.8 and 5.13–5.88 GHz. The proposed ultrawideband antenna also exhibits constant group delay and linear phase in the pass band. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:2195–2199, 2014