Abstract
In this paper, a scarecrow-shaped ultrawideband (UWB) antenna is presented using CPW and microstrip line feeding. The physical dimensions of the proposed antennas are $$25 \times 20 \times 1.6\,\hbox { mm}^{3}$$ , in which the modification in the ground is made by etching two half-circle and square slots symmetrical with respect to center feed line. The measured impedance bandwidth (return loss $$<\,10\,\hbox {dB}$$ ) obtained for CPW-fed antenna is 147.13% (2.51–16.48 GHz), and for microstrip-line-fed antenna it is 139.88% (2.86–16.17 GHz). Various antenna parameters for both the designs are calculated, such as gain, radiation pattern and group delay which are quite acceptable for UWB applications. The proposed designs are first simulated by the CST Microwave Studio, and optimized designs are fabricated. The simulated and measured results are compared for the validation of the design.
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