Broad band antennas
US6191756A · kind A · utility
9Cited by
8References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 29, 1999 |
| Grant date | Feb 20, 2001 |
| Priority date | — |
| Expiry date | Nov 29, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q1/36
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The outer turns (3) of a spiral antenna are radially modulated to extend the low-frequency response. The modulation amplitude increases progressively with spiral angle. The unmodulated region may consist of equally-spaced inner turns (1), and outer turns (2) whose spacing increases with angle. The track width of the outer turns may progressively decrease. Alternatively the track width of the outer unmodulated region may increase, the width of the modulated turns then progressively decreasing. Corresponding modulation may be applied to the outer ends of the arms of sinuous antennas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.