A study of a bowtie antenna integrated into a high-impedance ground plane

Enhanced design of bowtie antennas over High-Impedance surfaces: An evolutionary approach

“…Nevertheless, for |S 11 | ≤ -7.5 dB, a bandwidth of 56 % is observed. A fabricated prototype of this design is shown in Figure 2; the testing and further optimization of this design is currently in progress and the results will be given in the presentation Both of the above designs exhibit better performance in terms of return loss bandwidth and radiation pattern stability over bowtie antenna designs studied previously in the literature [5,6,7]. The printed bowtie with a matching network over conventional ground plane in [3] has an impedance bandwidth of about 12 %.…”

“…In particular, EP has been shown to be more efficient than GAs and PSO for antenna optimization problems whose objective functions are muti-modal with many local optima [3,4]. In this work, we have applied a hybrid of EP and the Method of Moment (MoM) based Ansoft Designer to optimize the performance of printed bowtie antennas over high impedance surfaces (HIS), resulting in enhanced characteristics that are not achievable using standard design approaches [5,6,7]. This hybrid approach captures all the coupling interactions between the antenna and the HIS ground-plane.…”