Design of a band‐notched broadband series‐fed two dipole array antenna

In this article, a band‐notched broadband series‐fed two dipole array (STDA) antenna is proposed. A design method to obtain a band rejection in the 2.4–2.484 GHz WLAN band is investigated for an STDA antenna consisting of two dipoles and a ground reflector operating in the frequency range between 1.7 and 2.7 GHz for mobile communication applications. The notch band is achieved by inserting U‐shaped slots on the coplanar strip line connecting the two dipole elements. The effects of the location and dimension of the slots on the notch band characteristics are investigated. A prototype of the proposed antenna is fabricated on an FR4 substrate. Experimental results show that the proposed antenna presents a broad bandwidth of 1.65–2.78 GHz (51.02%) for a voltage standing wave ratio < 2 and a rejection band of 2.39–2.54 GHz, which covers the desired notch band. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:911–915, 2013; View this article online at wileyonlinelibrary.com. DOI: 10.1002/mop.27439