Title :
Controlled leaky-wave radiation by surface-wave launching and microstrip width-modulation
Author :
Podilchak, Symon K. ; Freundorfer, Alois P. ; Antar, Yahia M. M. ; Matekovits, Ladislau ; Orefice, Mario
Author_Institution :
Dept. of Electr. & Comput. Eng., R. Mil. Coll. of Canada, Kingston, ON, Canada
Abstract :
A new leaky-wave antenna (LWA) for continuous beam scanning and broadside radiation is presented. The fabricated and measured planar antenna is fed by surface waves (SWs) and defined by a periodic arrangement of width-modulated microstrip lines for leaky wave (LW) excitation and radiation. In addition, a novel transition section near the SW source controls the leakage rate as well as the aperture distribution. Results are further supported by theoretically determined dispersion diagrams (DDs) in terms of Mathieu functions. Far-field beam scanning is also observed over a large radiating bandwidth (19.0 GHz to 26.3 GHz) for the measured and simulated LWA with pointing angles ranging from -26° to +35.0° in the E(x-z) plane.
Keywords :
leaky wave antennas; microstrip lines; planar antennas; Mathieu functions; SW source; aperture distribution; bandwidth 19 GHz to 26.3 GHz; broadside radiation; continuous beam scanning; controlled leaky-wave radiation; dispersion diagrams; far-field beam scanning; leakage rate; leaky wave excitation; leaky-wave antenna; microstrip width-modulation; periodic arrangement; planar antenna; surface-wave launching; transition section; width-modulated microstrip lines; Antenna measurements; Apertures; Leaky wave antennas; Microstrip; Surface impedance; Surface waves;
Conference_Titel :
Antennas and Propagation Society International Symposium (APSURSI), 2013 IEEE
Conference_Location :
Orlando, FL
Print_ISBN :
978-1-4673-5315-1
DOI :
10.1109/APS.2013.6710683
