A capacitively-coupled series-fed patch leaky-wave antenna and optimization concepts for efficient broadside radiation
In: 2012 the 7th German Microwave Conference (GeMiC) : 12 - 14 March 2012, Ilmenau, Germany
Ilmenau: Univ. of Technology, Dep. of Electrical Engineering and Information Technology, Inst. for Information Technology, RF & Microwave Research Laboratory (2012), S. 211 - 214
ISBN: 978-3-9812668-4-9, 978-1-4577-2096-3, 978-3-9812668-5-6
Buchaufsatz / Kapitel / Fach: Elektrotechnik
Fakultät für Ingenieurwissenschaften » Elektrotechnik und Informationstechnik » Hochfrequenztechnik
This paper presents a novel series-fed patch leakywave antenna (LWA) and furthermore demonstrates optimization strategies for achieving efficient broadside radiation. The proposed LWA is based on the concept of a proximity coupled microstrip patch antenna. Here, two feeding lines from both sides couple capacitively to the microstrip patch edges to form a unit cell element of the LWA. This capacitively-coupled series-fed patch (CSFP) LWA offers several advantages over a conventional series-fed patch LWA, as it provides, a broadband 50 Ohm input impedance, electrically independent tuning parameters and most importantly the total elimination of the open-stopband problem (standing-wave phenomena) at broadside. Finally, CSFP prototypes for 24 GHz are presented with input impedance,scattering parameter and gain measurement results for validation of the proposed designs.