Bandwidth Enhancement of a Microstrip-Line-Fed Printed Rotated Wide-Slot Antenna Based on Self-Shape Blending Algorithm

Abstract

This paper proposes a self-shape blending algorithm to improve antenna bandwidth. A printed antenna is designed for bandwidth enhancement based on the proposed algorithm; this approach can also be used to enhance bandwidth in other applications. The antenna completely covers WLAN bands and WiMAX bands after the proposed algorithm is applied. The shape of the rotating slot and the parasitic patch also changes, which excites additional resonance and improves the impedance matching at high frequencies. Test results show that the proposed antenna can work from 2.07 GHz to 5.94 GHz with S 11 ≤ − 10 dB . Compared to a slot antenna without the self-shape blending algorithm, the bandwidth increases by more than 0.7 GHz.

Improved Bandwidth of Microstrip Wide-Slot Antenna Using Gielis Curves

“…For instant, the antenna proposed in [16] has wide impedance bandwidth of 148.6% and an acceptable gain of 4.7 dBi, its size is large. To remove this 2 challenge, wide-slot antennas with irregular shapes and parasitic elements are merged together [17][18][19][20][21][22][23][24]. For instance, an irregular polygonal shaped wide-slot has been proposed in [17] with reduced size and an impedance bandwidth of 127.5%.…”

“…A printed reconfigurable wide-slot antenna has been proposed in [18] exhibits the bandwidth from 3-13.6 GHz (127.7%). Recently, a microstrip wideslot antenna based on a self-shape blending algorithm has been designed in [22] for working from 2.07 GHz to 5.94 GHz to cover WLAN and WiMAX bands. More recently, a compact circularly polarized wide-slot antenna with 16.2% bandwidth and gain larger than 2.5 dBi has been proposed in [23].…”