Title :
Microwave Transmission-Line Lens Matched with Free Space
Author :
Alitalo, Pekka ; Vehmas, Joni ; Luukkonen, Olli ; Jylha, Liisi ; Tretyakov, Sergei
Author_Institution :
Radio Lab., TKK Helsinki Univ. of Technol., Helsinki
Abstract :
In order to mitigate the problem of unwanted reflections from a homogeneous dielectric lens, a lens based on periodic networks of transmission lines is proposed. Since the propagation constant and the impedance of the network can be varied to a large extent independently from each other, it is possible to realize a lens with a high index of refraction while having almost perfect impedance matching with the surrounding medium.
Keywords :
impedance matching; lenses; microwave devices; refractive index; transmission line theory; dielectric lens; free space; impedance matching; microwave transmission-line lens; network impedance; periodic networks; propagation constant; refraction index; Dielectric materials; Frequency; Impedance matching; Laboratories; Lenses; Optical design; Permittivity; Propagation constant; Space technology; Transmission lines;
Conference_Titel :
Antenna Technology: Small Antennas and Novel Metamaterials, 2008. iWAT 2008. International Workshop on
Conference_Location :
Chiba
Print_ISBN :
978-1-4244-1522-9
DOI :
10.1109/IWAT.2008.4511337
