Antenna for sealed transmitter assembly in subsurface utility installations
US8159401B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 16, 2009 |
| Grant date | Apr 17, 2012 |
| Priority date | — |
| Expiry date | Apr 1, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q9/0421
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An antenna (14, 15) for installation in a subsurface ground enclosure has an F-shaped radiating element (15) having a rectangular strip (15c) disposed on edge and two spaced apart bars (15a, 15b) disposed substantially perpendicular to the rectangular strip (15c) for connection to a first edge of a circuit board (31) and an L-shaped ground plane extension element (14) extending from a second edge (31b) of the circuit board (31) and then turning substantially perpendicular downward to provide a longer ground plane within a confined rectangular space. The antenna (14, 15) is dimensioned so as to be tuned to a resonant frequency in a range from 450 Mhz to 470 Mhz.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.