Title :
Analysis of spherical lens antennas - comparison of two approaches
Author :
Sipus, Zvonimir ; Burum, Niksa ; Komljenovic, Tin
Author_Institution :
Fac. of Electr. Eng. & Comput., Zagreb Univ., Zagreb
Abstract :
The paper presents a comparison of two approaches for analyzing spherical lens antennas - spectral-domain method and ray-tracing method. The spectral-domain method takes advantage of transforming the three- dimensional problem into a set of one-dimensional problems. The spherical lens antenna is rigorously taken into account by implementing the Green´s functions for the multilayer spherical structures. Different types of feeding antennas can be easily included in the analysis method by calculating the vector-Legendre transformation of the equivalent or physical currents that represent the considered feed. The ray-tracing method is a general analysis method that can be applied to all kinds of lenses with general (non-symmetric) shape. The results of the analysis are compared with measured radiation pattern of a 12 layer Luneburg lens antenna.
Keywords :
Green´s function methods; antenna feeds; antenna radiation patterns; lens antennas; Green´s functions; antenna feed; multilayer spherical structures; radiation pattern; ray-tracing method; spectral-domain method; spherical lens antennas; vector-Legendre transformation; Antenna feeds; Dipole antennas; Equations; Lenses; Microstrip antennas; Optical refraction; Ray tracing; Satellite antennas; Satellite broadcasting; Vehicles;
Conference_Titel :
Applied Electromagnetics and Communications, 2007. ICECom 2007. 19th International Conference on
Conference_Location :
Dubrovnik
Print_ISBN :
978-953-6037-50-6
Electronic_ISBN :
978-953-6037-51-3
DOI :
10.1109/ICECOM.2007.4544483
