Isotopic broad-band survey meter
US4365192A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 27, 1980 |
| Grant date | Dec 21, 1982 |
| Priority date | — |
| Expiry date | Aug 27, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R29/0871
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A monitor for measuring the field strength of RF radiation is disclosed. A set of three mutually orthogonal antennas sense the total field strength. Digital linearizing and scaling circuits provide an output equal to the sum of the square of the field components. In the preferred embodiment, the digital circuitry includes a control or zero channel which provides a zero level control signal which is processed to provide a correction signal to the analog to digital conversion circuitry to remove the effects of noise, pickup and drift on both the transmission line, which connects the antenna and the monitor, and on the analog electronic circuits of the monitor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.