Dual mode antenna having simultaneous operating modes
US4635070A · kind A · utility
9Cited by
6References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 19, 1983 |
| Grant date | Jan 6, 1987 |
| Priority date | — |
| Expiry date | Dec 19, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q9/40
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A dual mode broad band antenna especially designed to provide simultaneously high and low angle radiation patterns relative to a horizontal ground plane is disclosed herein. This particular antenna utilizes four wire radiators in the form of an inverted conical log-spiral supported in a vertically extending fashion a predetermined distance above the horizontal ground plane. In order to operate the antenna in its high and low angle modes simultaneously, first and second oppositely phased AC currents are applied to the radiators in two different ways through specifically connected hybrid isolating transformers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.