Triple frequency, split monopole, emergency locator transmitter antenna
US6411260B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 28, 1997 |
| Grant date | Jun 25, 2002 |
| Priority date | — |
| Expiry date | Jul 4, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q5/321
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A split monopole antenna that provides for simultaneous transmission of 121.5, 243 and 406 MHz emergency signals using a simple, lightweight structure that can be stowed in an aircraft in a compact manner during non-deployment, and after deployment enables the beacon to float in water in an upright orientation. The monopole antenna comprises three radiating elements. The first radiating element is electrically coupled to a transmitting unit and radiates a 406.025 MHz signal; the second radiating element is electrically coupled to the first radiating element by way of a first band rejection filter and both elements radiate at 243 MHz; and the third radiating element is electrically coupled to the second radiating element by way of a second band rejection filter and all three elements radiate at 121.5 MHz.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.