Characteristics of the radiation from the end of the Transmission Line on the basis of spherical lenses made of foam dielectric

Proposed in recent years Foamy-Dielectric Lens Transmission Line (FDLTL) is a waveguide consisted of lenses made of foaming dielectric which has value of refraction index near 1. The lenses of such line are situated very close to each other. Thanks to these the lenses are capable of holding a Gaussian beam within a fairly narrow channel. In this FDLTL has a small amount of running losses due to low values of the coefficient of reflection from the surface of the lens and due small absorption coefficient of the lenses material. In view of these, the total losses of FDLTL are smaller of 0.7 dB/m.