A Novel Heptagonal Slot Antenna for Ultra Wideband Wireless Communication Applications | ||
| Journal of Engineering and Sustainable Development | ||
| Article 1, Volume 18, Issue 6, December 2014, Pages 59-76 | ||
| Authors | ||
| Abdulkareem Swadi Abdullah; Malik Jasim Farhan | ||
| Abstract | ||
| In this paper, a novel design of heptagonal slot antenna is proposed to be used for ultra wideband (UWB) applications. This antenna has a heptagonal slot with suitable dimensions on the lower side of a dielectric substrate which represents the ground plane, and a symmetrical slant cut ends microstrip line on the upper side of the substrate. In order to cover the entire bandwidth that was specified for UWB applications, a bevel rectangular with rectangular notch cut tuning stub is used to enhance the coupling between the heptagonal slot and the taper microstrip feed line. Several kinds of techniques are used to improve the design of the proposed antenna such as; adjusting the gap between the tuning stub and lower edge of heptagonal slot, adjusting the feed position point of the tuning stub, adjusting the end cut angle of microstrip line and bevel angle of tuning stub. The radiation characteristics of the proposed antenna such as radiation pattern, gain, impedance bandwidth are investigated and found be accepted over the whole operating bandwidth. The proposed antenna also shows a good time domain characteristics and has a linear phase over this band giving less distortion of the received signal. | ||
| Keywords | ||
| Heptagonal antenna; slot antenna; printed antenna; UWB antenna; tuning stub | ||
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