half hexagonal shaped uwb antenna with triple band notch using resonating structures for wireless communication

In this article, an uwb (ultra-wide band) compact monopole antenna with triple band-notched characteristics is presented. the proposed structure is designed on the fr-4 substrate with εr=4.3, tan δ = 0.025. the antenna structure consists of half-hexagon monopole with rectangular and square resonant spirals structures for the exclusion of frequency bands for wimax (3.25-3.85ghz), wlan(5.15-5.85ghz) and fixed/mobile satellite communication (7.55-7.75ghz). the compact antenna of size 28x 29 mm2 achieves simulated ultra-wide bandwidth of 14.7ghz (2.9ghz-17.6ghz) and measured bandwidth of 14.8ghz (3.21-18.0ghz). the stable gain characteristic is obtained for pass band and gain is reduced to -2.02dbi (3.57ghz), 0.4 dbi (5.3ghz) and-2.75dbi (7.6ghz) at band notch frequencies.