Capacitatively shunted quadrifilar helix antenna
USRE42533E1 · kind E1 · reissue
Assignee
Inventor
Key dates
| Filing date | Jul 20, 2006 |
| Grant date | Jul 12, 2011 |
| Priority date | — |
| Expiry date | Jul 20, 2026 |
Classification
- Technology area (CPC —)General
Abstract
A quadrifilar helix antenna is provided having a feedpoint for the antenna connecting to individual helical antenna elements. A capacitive network, distributed along the length of the antenna, constitutes a variable frequency shunting network. At each position a first capacitive structure, that may comprise a single capacitor or multiple capacitors in series, interconnects a first pair of opposite antenna elements; a second capacitive structure interconnects the second pair of opposite antenna elements. As an applied frequency increases, the capacitive structures progressively short the opposite antenna elements thereby electrically reducing the antenna length.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.