Tri-band antenna with slot patterns on the edge

Abstract

A tri-band antenna has been designed for the satellite communication devices. It is constructed as a U-shaped slot put into the middle of the patch, and two L-shaped slot patterns around the edge, accompanied with 4 circular corners on the patch. Three frequency bands can be achieved in the range of 4.63 GHz-6.55 GHz, 8.34 GHz- 9.59GHz, and 12.34 GHz-13.79GHz. Current distribution has been analyzed on each slot size. It is found that return loss has been reduced effectively in required frequencies when increasing the length of current path properly. In addition, reducing the width of ground, the whole size of antenna can be decreased, and its radiation effectiveness can be enhanced. Measurement results show the antenna available.