Title :
Exact radiation from a prolate spheroidal antenna coated with isorefractive and anti-isorefractive confocal layers
Author :
Askarpour, Amir Nader ; Uslenghi, Piergiorgio L E
Author_Institution :
Sch. of Electr. & Comput. Eng., Univ. of Tehran, Tehran, Iran
Abstract :
The radiation by an annular slot in a perfectly conducting prolate spheroidal antenna is studied, when the antenna is coated by a confocal layer made of either isorefractive material or anti-isorefractive DNG metamaterial. The field components are expressed as infinite series of prolate spheroidal wavefunctions, whose modal expansion coefficients are determined analytically. Numerical results are presented for the radiated far field, the field inside the coating layer, and the input admittance of the antenna.
Keywords :
antenna radiation patterns; metamaterial antennas; wave functions; annular slot radiation; anti-isorefractive DNG metamaterial; anti-isorefractive confocal layers; coating layer; exact radiation; input admittance; isorefractive material; modal expansion coefficients; perfectly conducting antenna; prolate spheroidal antenna; prolate spheroidal wavefunctions; radiated far field; Admittance; Coatings; Dipole antennas; Educational institutions; Materials; Slot antennas;
Conference_Titel :
Electromagnetics in Advanced Applications (ICEAA), 2011 International Conference on
Conference_Location :
Torino
Print_ISBN :
978-1-61284-976-8
DOI :
10.1109/ICEAA.2011.6046301
