Circularly polarized notch antenna
US6414645B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 8, 2001 |
| Grant date | Jul 2, 2002 |
| Priority date | — |
| Expiry date | Aug 8, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q15/242
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A circularly polarized single point feed notch antenna functions on land, sea, air and space vehicles and communicates using a broad frequency range while maintaining stealth during installation on a fighter aircraft by demonstrating a low Radar Cross Section (RCS). The circularly polarized notch antenna (CPNA) employs a phase delay card polarizer to achieve circularly polarized radiation or reception. The CPNA couples non-planar conductive fins to opposing sides of a non-conducting polarizing member. The fins fashion a ninety degree longitudinal fold, tuning slots at one fin end for tuning the antenna, and bifurcated arms at an opposing end formed by a notch. The bifurcated fins possess curved edges running from a part exterior to a part interior and a recession on the fold beginning near the tuning notch(es) and running the fin length until the recession runs out when it meets the curved edge.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.