A multi octaves directive dielectric lens: The Pyramid Antenna
other
Leaky wave antennas have been investigated for a long time and are typically an inexpensive solution for beam scanning antennas. We have designed a novel antenna topology, named the pyramid antenna, based on the broadband leaky concept. The pyramid antenna, currently covered by a patent application, has unparalleled bandwidth performances that can be briefly summarized as follows: 1) input impedance with low frequency dependence; reflection coefficients lower than -10 dB can be achieved over 1:8 bands; 2) H-plane radiation pattern is essentially frequency independent (on bands 1:10), while in the E-plane the directivity grows as a result of the lens shaping; 3) with respect to the competing Vivaldi type of radiators, the beam is purer in terms of polarization and more directive for comparable impedance bandwidths; 4) the pyramid antenna is suited for coplanar wave-guide excitation which is the natural output of many integrated circuits; 5) pyramid antennas can be arranged in an array using a unique larger lens, if it is wished to use these lenses in an array configuration to scan the beam in the F-plane; in this configuration, the cross polarization levels would be outstanding
Topics
TNO Identifier
219128
Publisher
IEEE
Source title
Proceedings of the 2005 IEEE Antennas and Propagation Society International Symposium, 3-8 July 2005, IEEE, Piscataway, NJ, USA, Vol.3A
Place of publication
Piscataway, NJ
Pages
536-539
Files
To receive the publication files, please send an e-mail request to TNO Repository.