Bicone antenna with hemispherical beam
US5134420A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 7, 1990 |
| Grant date | Jul 28, 1992 |
| Priority date | — |
| Expiry date | May 7, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q13/04
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A bicone microwave antenna having an orthomode tee as an input/output terminal, an internal dielectric polarizer, a circular waveguide with eight longitudinal radiating slots, two 30 degree conical reflectors, an external meanderline polarizer, and a partial circular waveguide short. An RF signal from the input/output terminal is converted into a rotating TE.sub.11 mode by the internal dielectric polarizer. The radiating slots in combination with the conical reflectors radiate the RF signal as a horizontally polarized field in a doughnut-shaped pattern. The meanderline polarizer converts the horizontally polarized field into a circularly polarized field. The partial circular waveguide short leaks a predetermined amount of radiation out the end of the waveguide to fill the center hole of the doughnut-shaped radiation pattern, thus producing a hemispherical RF beam having an elevation angle from 110 to -110 degrees. The use of impedance-matching circular rings in the waveguide further enhances the ability of the antenna to operate in three frequency bands.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.