Title :
Tailoring leaky-wave radiation with impedance surfaces
Author :
Tierney, Brian B. ; Grbic, A.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Univ. of Michigan, Ann Arbor, MI, USA
Abstract :
A method for designing TM leaky-wave antennas with prescribed far-field patterns using impedance surfaces is presented. The impedance surface amounts to a grounded, anisotropic substrate topped by a reactance sheet. The transverse resonance technique is employed to analytically solve for the propagation and leakage constants along the structure. Two design examples are reported: a constant amplitude aperture field with increased directivity, and a modified Hamming window aperture field with reduced sidelobe levels.
Keywords :
anisotropic media; antenna radiation patterns; leaky wave antennas; Hamming window aperture field; TM leaky-wave antenna; anisotropic substrate; constant amplitude aperture field; far-field pattern; impedance surface; leakage constant; leaky-wave radiation; propagation constant; reactance sheet; sidelobe level reduction; transverse resonance technique; Antenna radiation patterns; Apertures; Impedance; Leaky wave antennas; Substrates; Surface impedance; Surface waves;
Conference_Titel :
Antennas and Propagation Society International Symposium (APSURSI), 2014 IEEE
Conference_Location :
Memphis, TN
Print_ISBN :
978-1-4799-3538-3
DOI :
10.1109/APS.2014.6905100
