IPC Subgroup
G01S 13/74 Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
Introduced: January 1980
Last revised: January 2006
Full Title
Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified > Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
Classification Context
- Section:
- PHYSICS
- Class:
- MEASURING; TESTING
- Subclass:
- RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
Related Keywords
IDENTIFYING of friend or foe by radarradar INTERROGATORSRADAR transpondersradar RESPONDERSradar TRANSPONDERS
4 direct subcodes
Child Classifications
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- G01S 13/75 using transponders powered from received waves, e.g. using passive transponders
- G01S 13/76 wherein pulse-type signals are transmitted
- G01S 13/79 Systems using random coded signals or random pulse repetition frequencies
- G01S 13/82 wherein continuous-type signals are transmitted