Microstrip-line-fed snail-like slot antenna for ultra-wideband operation

Abstract

An UWB printed slot antenna with a snail-like slot has been presented. Experimental results show that a very wideband operation of presented microstrip-line-fed slot antenna can be obtained. And the impedance bandwidth, determined by 10 dB return loss, reaches nearly 10460 MHz, which is about 150.07%. The radiation patterns have been measured and presented by E- and H-planes, and slot-like patterns can be obtained. From measured results, antenna gain variation is larger than 3 dBi in the range of 3.1−10.6 GHz within this wide impedance bandwidth.