Dual polarized slotted array antenna
US6028562A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 31, 1997 |
| Grant date | Feb 22, 2000 |
| Priority date | — |
| Expiry date | Jul 31, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q21/064
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A waveguide-implemented antenna comprising a planar array of waveguide slot radiators for communicating electromagnetic signals exhibiting simultaneous dual polarization states. The antenna can consist of parallel waveguides of rectangular or ridged cross section. The broadwalls of each parallel waveguide contain a linear array of input slots for receiving (transmitting) electromagnetic signals having a first polarization state from (to) the parallel waveguide and for transmitting (receiving) those signals into (from) an array of cavity sections. The cavity sections comprise a short section of uniform waveguide with a length of much less than a wavelength in the propagation direction. The cavity sections feed to output slots which are rotated relative to the input slots; such that the output slots exhibit a second polarization state, which they radiate (receive) to (from) free space. By interlacing parallel waveguides with alternating +45 degree and -45 degree rotations of the output slots, two independent antennas are formed exhibiting simultaneous dual polarizations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.