Transmission line notch antenna
US5467098A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 2, 1994 |
| Grant date | Nov 14, 1995 |
| Priority date | — |
| Expiry date | Dec 2, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q21/067
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Non-resonant, end fire antennae that operate over broad frequency bands, can be incorporated into arrays and have low RF cross-sections are constructed from a transmission line, usually a piece of coaxial cable that if it is not self supporting, is mounted on or in a lightweight structural material with an outer end with a sheath or stripline the shape of half of a notch. The other half of the notch is formed from a conductor electrically connected to the center conductor of the coaxial cable. The cable and conductor are variably spaced to transition the characteristic impedance of the cable to that of free space. The conductor and the sheath are terminated either with ground connections or by inductive loads.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.