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ABSTRACT In this paper a coplanar waveguide (CPW) fed ultra-wideband (UWB) circular ring monopole antenna with a modified ground plane is proposed. The dimensions of the antenna are obtained using a genetic algorithm (GA) optimization procedure. To proof the concept and validate the design antenna prototypes have been fabricated and tested. A good agreement is obtained between numerical simulation and experimental results. The input reflection coefficient is below −10 dB in the frequency range 2.52 GHz to 12 GHz, which corresponds to an impedance bandwidth of about 4.8:1, and the gain is about 3 dBi. The proposed antenna element seems to be suitable for UWB and cognitive radio spectrum sensing applications. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:1319-1323, 2016 [ABSTRACT FROM AUTHOR]

ABSTRACT This article presents an application of a machine learning technique to enhance a multiobjective evolutionary algorithm to estimate fitness function behaviors from a set of experiments made in laboratory to analyze a microstrip antenna used in ultra wideband wireless devices. These function behaviors are related to three objectives: bandwidth, return loss, and central frequency deviation. Each objective is used inside an aggregate adaptive weighted fitness function that estimates the behavior in the algorithm. The machine learning technique enabled a dynamic estimation of an aggregated compound fitness function and made it possible to a prototype algorithm to learn and adapt with a set of experiments stored in a web system repository. The final results were then compared with the ones obtained with a similar antenna modeled in a simulator program and with the ones of a real prototype antenna built from the optimal values obtained after the optimization. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:1864-1868, 2013 [ABSTRACT FROM AUTHOR]

The Genetic Algorithm (GA) optimization technique is applied to the optimization of a profiled corrugated horn, designed as a feed for a space-borne remote sensing reflector-antenna system. In addition to using the standard GA (SGA) optimization technique, a profiled corrugated horn is also designed and analyzed using micro GA (μGA). A comparative study has been performed among the various designs. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 35: 449–453, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10635 [ABSTRACT FROM AUTHOR]