@article{Woo_Lee_Kim_Choi_2015, title={An Octave Bandwidth Metamaterials-based Hexagonal Patch Antenna}, volume={21}, url={https://eejournal.ktu.lt/index.php/elt/article/view/13325}, DOI={10.5755/j01.eee.21.5.13325}, abstractNote={<p>A broadband metamaterials (MTM)-based hexagonal patch antenna is designed and presented. A hexagonal shape of a top patch on a mushroom structure makes not only direct-current paths between two ends of the patch but also round-current path along the outside of the patch, thereby widening a resonance frequency of the mushroom MTM antenna. Moreover, input microstrip transmission line acted as a reflecting element for the surface wave, resulting in forward-directed end-fired radiation. The hexagonal patch was implemented by utilizing a composite right-and left-handed (CRLH) transmission line. The antenna operates from 15.9 GHz to 30.6 GHz covering the Ku- to Ka-band. The antenna gain is from 6 dBi to 9.3 dBi with small size compared to the conventional antennas. The application areas are in automotive radars and ground penetrating radar (GPR).</p> <p>DOI: <a href="http://dx.doi.org/10.5755/j01.eee.21.5.13325">http://dx.doi.org/10.5755/j01.eee.21.5.13325</a></p>}, number={5}, journal={Elektronika ir Elektrotechnika}, author={Woo, Dong Sik and Lee, Cherl-Hee and Kim, Kang Wook and Choi, Hyun-Chul}, year={2015}, month={Oct.}, pages={44-47} }