TY - JOUR AU - Palomares Caballero, Ángel AU - Padilla De La Torre, Pablo AU - Alex Amor, Antonio AU - Valenzuela Valdes, Juan Francisco AU - Quevedo Teruel, Óscar PY - 2019 UR - http://hdl.handle.net/10481/62018 AB - Here we propose the use of twist and glide symmetries to increase the equivalent refractive index in a helical guiding structure. Twist- and glide-symmetrical distributions are created with corrugations placed at both sides of a helical strip.... LA - eng PB - MDPI KW - Higher symmetries KW - Periodic structures KW - Glide symmetry KW - Twist symmetry KW - Dispersion diagram KW - Microwave printed circuits KW - Helix antennas TI - Twist and Glide Symmetries for Helix Antenna Design and Miniaturization DO - 10.3390/sym11030349 ER -