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Design of Half Elliptical Ring Monopole Antennas with Elliptical Slot in Ground Plane for Future UWB Applications

Research Authors
O. M. Ahmed, A. Elboushi, and A. R. Sebak
Research Member
Research Department
Research Year
2012
Research Journal
Microwave and Optical Technology Letters
Research Vol
Vol. 54, No. 1
Research Rank
1
Research_Pages
pages 181–187
Research Abstract

In this letter, a microstrip fed ultra-wideband (UWB) antenna with different band rejection techniques is presented. The designed antennas consist of a defected ground plane with an elliptical slot and elliptical shaped radiating element. The measured and calculated impedance bandwidth of the proposed antenna ranges from 3 to 14 GHz for a return loss (S11) less than −10 dB. Also, it has a relatively stable radiation patterns over its whole frequency band of interest. Two different techniques have been proposed to achieve band-notch characteristic in the 5.0- to 6.0-GHz wireless local area network frequency band. The first one uses L-shaped parasitic strip into the radiating patch, whereas the other one uses two rectangular slits cut away from the ground plane creating defected ground structure. The proposed antenna is considered a good candidate for UWB applications.