Folded cross grid dipole antenna element
US5293176A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 18, 1991 |
| Grant date | Mar 8, 1994 |
| Priority date | — |
| Expiry date | Nov 18, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q21/062
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A wide bandwidth, wide scan, antenna array element provides an active element impedance close to 350 ohms over a bandwidth approaching one octave in a periodic equilateral triangular array lattice. The two balanced feed inputs to each element may be phased to produce any desired polarization. The interelement spacing is the maximum possible for grating lobe free operation. This antenna element combines features of a crossed grid dipole with a folded dipole. The antenna structure consists of conductors lying in two planes which are parallel to a ground plane. These are joined by a limited number of perpendicular conductors. The VSWR remains below 2:1 in a 300 or 350 ohm system for scan in any direction out to 30 degrees off of broadside over a bandwidth approaching one octave.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.