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A method to overcome the limitations of G.O. in axis-symmetric dielectric lens shaping

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Lemaire, D. Fernandes, C Sobieski, Piotr [UCL] Barbosa, A

The design of a cylindrically symmetric dielectric lens antenna is presented for the case of a very squeezed fan-beam. One makes use of geometrical optics (G.O.) to establish the profile of the lens in a first step. A half-integrated solution of Green's formula for bodies with cylindrical symmetry and circularly polarized surface fields is then derived to calculate the radiation pattern. Since the use of G.O. is restricted to some conditions which were observed unsatisfied in our study, a two-steps procedure to reach an acceptable lens shape is then presented. The first step is based on weighting the source beam of the antenna; and the second one is based on simple geometrical interpolation. Prototypes provided experimental results that are consistent with the predicted radiation characteristics and interesting features of such antennas are pointed out.

Document type Article de périodique (Journal article) – Article de recherche
Access type Accès restreint
Publication date 1996
Language Anglais
Journal information "International Journal of Infrared and Millimeter Waves" - Vol. 17, no. 8, p. 1377-1390 (1996)
Peer reviewed yes
Publisher Plenum Publ Corp (New York)
issn 0195-9271
e-issn 1572-9559
Publication status Publié
Affiliation UCL - FSA/ELEC - Département d'électricité
Links
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  8. Adel A. Saleeb, “Comments on Refraction on a Curved Dielectric Interface: Geometrical Optics Solution.”, IEEE Trans. on M.T.T., Vol 38, No 4, pp 452–453, Apr. 1990.
  9. C. Fernandes, P. Francês, A. Barbosa, “Shaped coverage of elongated cells at millimeter waves using a dielectric lens antenna”, Proceedings 25 th European Microwave Conference, Italy, pp. 66–70, Sept. 1995.
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Bibliographic reference Lemaire, D. ; Fernandes, C ; Sobieski, Piotr ; Barbosa, A. A method to overcome the limitations of G.O. in axis-symmetric dielectric lens shaping. In: International Journal of Infrared and Millimeter Waves, Vol. 17, no. 8, p. 1377-1390 (1996)
Permanent URL http://hdl.handle.net/2078.1/46958