Title :
Procedure for correct refocusing of the Rotman lens according to Snell´s law
Author :
Gagnon, David R.
Author_Institution :
US Naval Weapons Center, China Lake, CA, USA
fDate :
3/1/1989 12:00:00 AM
Abstract :
A procedure is derived for proper refocusing of a dielectric-filled Rotman lens with beam port locations determined according to Snell´s law. The theoretical performance of such a lens is compared with that of a conventional design at wide scan angle and the design equations for correct refocusing of the refracting lens derived. The approach provides an alternative lens configuration which may give a wider field of scan, at a given focal length, for lenses fabricated in microstrip or stripline. The presence of grating lobes in the lens is discussed
Keywords :
antenna theory; lens antennas; Rotman lens; Snell´s law; antennas; dielectric-filled; grating lobes; microstrip; refocusing; scan angle; stripline; Antenna arrays; Dielectric constant; Dielectric substrates; Gratings; Lenses; Microstrip antenna arrays; Microwave theory and techniques; Optical coupling; Optical design; Stripline;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
