Communications: radio wave antennas – Antennas – Wave guide type
Patent
1991-12-31
1993-09-28
Hajec, Donald T.
Communications: radio wave antennas
Antennas
Wave guide type
343772, 343786, H01Q 1300
Patent
active
052489876
ABSTRACT:
The widebeam antenna includes a tapered dielectric waveguide having a radiating end and an end for coupling electromagnetic energy into and out of the dielectric waveguide. A conducting sleeve surrounds the dielectric waveguide. A corrugated flange surrounds the sleeve near the radiating end of the waveguide and a dielectric ring also surrounds the radiating end of the waveguide. It is preferred that the dielectric ring have a dielectric constant in the range of 2.0 to 4.0. The structure of the invention provides substantially uniform hemispherical coverage for the transmission and reception of electromagnetic energy.
REFERENCES:
patent: 3389394 (1968-06-01), Lewis
patent: 4468672 (1984-08-01), Dragone
patent: 4673945 (1987-06-01), Syrigos
patent: 4673947 (1987-06-01), Newham
E. A. Lee and Y. M. Hwang, "An EHF Omnidirectional Lens Antenna", IEEE 1989, pp. 1610-1613.
John D. Krauss, "Antenna", Second Edition, Date is not given, Contents only.
F. Baldissar and L. A. Alfredson, "A Ku-Band Antenna for Spacecraft Telemetry and Command", IEEE 1984, pp. 155-157.
Hajec Donald T.
Ho Tan
Massachusetts Institute of Technology
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