Design, optimization, and realization of a wire antenna with a 25:1 bandwidth ratio for terrestrial communications

Authors

KORKUT YEĞİN

Abstract

Wire antennas can be made wideband if the antenna is loaded with passive elements and connected to a lossless matching network. However, realization of the load component values and matching network can easily become impractical. In this study, using only a surface mount and standard component values, antenna loads and a matching network are optimized using genetic algorithms. The optimized design achieves a 25:1 bandwidth ratio, from 20 MHz to 500 MHz, with a maximum voltage standing wave ratio (VSWR) of 3.5 and minimum system gain of --5 dBi. The antenna system gain at azimuth is taken as the objective function and an exact penalty function is formulated to take into account the VSWR over the design frequency band. A loaded antenna is built and measured to corroborate the simulations results. The realized antenna is only 0.14 lambda long at 20 MHz.

DOI

10.3906/elk-1209-45

Keywords

Broadband antenna, loaded wire antenna, genetic algorithms, exact penalty functions

First Page

371

Last Page

379

Recommended Citation

YEĞİN, KORKUT (2014) "Design, optimization, and realization of a wire antenna with a 25:1 bandwidth ratio for terrestrial communications," Turkish Journal of Electrical Engineering and Computer Sciences: Vol. 22: No. 2, Article 11. https://doi.org/10.3906/elk-1209-45
Available at: https://journals.tubitak.gov.tr/elektrik/vol22/iss2/11