Band-notched printed dipole antenna with EBG reflector

Abstract

This paper presents the design and experiment of band-notched printed dipole antenna with the mushroom-like electromagnetic band gap (EBG) reflector plane operating at the frequency bandwidth for digital television (DTV) signal reception, 470∓862 MHz. The proposed antenna consists of a band-notched printed dipole antenna that can provide the wider bandwidth and the EBG reflector that can suppress the surface wave on the reflector better than on conventional PEC reflector, consequently, its total gain in the desired bandwidth can be increased too. To meet our requirement, the results of the reflection coefficient (S <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">11</inf> ), gain, and radiation patterns of this antenna have been simulated by using the licensed simulation software, CST Microwave Studio program and validated with the measured results in laboratory. It is found that the proposed antenna yields the wide-bandwidth around 62.77% at frequency range 470–900 MHz, and the directive gains around 6.97 dB, 6.96 dB and 7.39 dB at 514 MHz, 650 MHz and 786 MHz of the frequency bands, respectively.