H. Sakurai et al., ELECTROMAGNETIC SCATTERING BY THE LUNEBERG LENS WITH REFLECTING CAP, IEEE transactions on electromagnetic compatibility, 40(2), 1998, pp. 94-96
The near-field distribution in the case of the normal incidence to the
Luneberg lens reflector is numerically obtained by using the modal ex
pansion technique and point-matching method. As a model of the Luneber
g lens, six different homogeneous media is used. A microwave experimen
t was also performed.