G01S 3/16 using amplitude comparison of signals derived sequentially from receiving antennas or antenna systems having differently-oriented directivity characteristics or from an antenna system having periodically-varied orientation of directivity characteristic
Introduced: September 1968
Full Title
Full titles differ between systems:
Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic or electromagnetic waves, or particle emission, not having a directional significance, are being received > using radio waves > Systems for determining direction or deviation from predetermined direction > using amplitude comparison of signals derived sequentially from receiving antennas or antenna systems having differently-oriented directivity characteristics or from an antenna system having periodically-varied orientation of directivity characteristic
Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic or electromagnetic waves, or particle emission, not having a directional significance, are being received (position-fixing by co-ordinating a plurality of determinations of direction or position lines G01S5/00) > using radio waves > Systems for determining direction or deviation from predetermined direction > using amplitude comparison of signals derived sequentially from receiving antennas or antenna systems having differently-oriented directivity characteristics or from an antenna system having periodically-varied orientation of directivity characteristic
IPC and CPC are identically structured here. All 3 subcodes exist in both systems.
Child Classifications
Navigate with arrow keys, Enter to open
- G01S 3/20 derived by sampling signal received by an antenna system having periodically-varied orientation of directivity characteristic IPC+CPC Available in IPC and CPC
- G01S 3/22 derived from different combinations of signals from separate antennas, e.g. comparing sum with difference IPC+CPC Available in IPC and CPC