Design of a Novel Ultra-Wideband Microstrip Patch Antenna with DGS

In this paper, a new ultra-wideband microstrip patch antenna with a total size of <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$32\times 29\times 1.6 \ \text{mm}^{3}$</tex> is proposed. In order to realize a wide operating bandwidth, the antenna is designed based on the traditional square patch by trimming and parasitizing the patch and using a defected ground structure (DGS). The final resonance range of the antenna is from 2.79 GHz to 15.6 GHz with a bandwidth of 139% and a peak gain of up to 3.1 dBi by CST optimization analysis. The study of the novel antenna proposed in this paper in terms of return loss, gain and far-field radiation direction map reveals that the antenna can provide good ultra-broadband performance, as well as the advantages of simple structure, low cost and easy integration and processing.