Control of passive intermodulation on aircrafts
US8253644B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 31, 2009 |
| Grant date | Aug 28, 2012 |
| Priority date | — |
| Expiry date | Nov 13, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q1/52
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
There is described a Passive Intermodulation (PIM) shield for use with an aircraft for reducing PIM sources, the PIM shield comprising: a conductive material adapted to be placed between an antenna and a fuselage of the aircraft for preventing undesired Radio Frequency (RF) signals resulting from a combination of RF signals transmitted from and to the antenna and generated by non-linear junctions or material between the antenna and the fuselage of the aircraft, the conductive material having a thickness based on an RF skin-depth related to an operating frequency of the antenna. There is described a method for determining an operating frequency of an antenna, determining an RF skin-depth related to the operating frequency of the antenna, and providing the PIM shield.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.