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...http://www.google.com/patents/US4365192?utm_source=gb-gplus-sharePatent US4365192 - Isotopic broad-band survey meter
