Planar array waveguide antenna with L-shaped series/series coupling slots
US5079561A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 7, 1991 |
| Grant date | Jan 7, 1992 |
| Priority date | — |
| Expiry date | Jun 7, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q21/005
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An array antenna which includes a first waveguide 12 coupled to a second waveguide 20 by an L-shaped coupling slot 30. The slot 30 has a first portion 32 orthogonal to a second portion 34 thereof thereby providing the unique L-shape. In a specific embodiment, the slot 30 is located with the first portion 32 along the centerline and longitudinal axis of the first waveguide 12 and the second portion 34 along the centerline and longitudinal axis of the second waveguide 20. The folded short, as well as the tapered section of prior designs can be eliminated by use of the L-shaped coupling slot of the present invention in the first and last positions of the coupling slot because a short can be placed at the L-shaped slot. Hence, the L-shaped coupling slot of the present invention provides a more compact planar antenna than that afforded by conventional designs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.