An UWB Antenna Design Having Band-Reject Characteristic by Y-Shaped Strip

Abstract

In this study, an ultra-wide band (UWB) antenna having band-notched operation for WLAN application has been designed. To model the antenna design, HyperLynx® 3D electromagnetic simulation program is used. The UWB antenna operates between the frequencies of 2.5 GHz and 11 GHz. To obtain the ideal rejecting characteristic over the desired frequency band, a Y-shaped strip is added into the full UWB antenna radiator. Thus, a frequency rejection response is obtained in band range of 5.0 GHz and 6.0 GHz for WLAN application. By changing the size of the Y-shaped strip, not only center frequency for interval 5 GHz and 6 GHz but also rejected bandwidth can be readily shifted. As a result, A suitable notch characteristic is achieved for desired band thanks to optimized strip geometry.