172290 ⎘
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 simultaneously from receiving antennas or antenna systems having differently-oriented directivity characteristics derived from different combinations of signals from separate antennas, e.g. comparing sum with difference
Sub-classes:ANTENNA SYSTEMS AND METHODS FOR TRACKING NON-GEOSYNCHRONOUS SATELLITES
#2ANTENNA SYSTEMS AND METHODS FOR TRACKING NON-GEOSYNCHRONOUS SATELLITES
#3Geolocation of an electromagnetic emitter utilizing receptor pattern slope
#4Method and apparatus for estimating direction of arrival using generation of virtual received signals
#5Estimating angle measurements for source tracking using a phased array system
#6Measuring device and measuring method for emulating an angle of departure determining test signal
#7Method and apparatus for estimating direction of arrival using generation of virtual received signals
#8Automated landing solution systems and methods
#9Estimating angle measurements for source tracking using a phased array system
#10Angle of arrival estimation in a radio communications network
#11Methods for performing antenna beam scanning
#12Multipolarized vector sensor array antenna system for search and rescue applications
#13RADIO-WAVE ARRIVAL-DIRECTION ESTIMATION DEVICE AND RADIO-WAVE ARRIVAL-DIRECTION ESTIMATION METHOD
#14Radio analysis apparatus and method
#15DISCRIMINATION OF SIGNAL ANGLE OF ARRIVAL USING AT LEAST TWO ANTENNAS
#16Antenna device and antenna excitation method
#17Method for measuring a direction of incidence of an incident wave for an instantaneous wideband receiver and associated receiver
#18Correlated fanbeam extruder
#19Signal direction processing for an antenna array
#20Space time interleaved matched-filters
#21Waveguide structure for use in direction-of-arrival determination system and associated determination method
#22Elevation monopulse antenna synthesis for azimuth connected phase array antennas and method
#23System for and method of locating radio frequency identification (RFID) tags associated with items in a controlled area
#24Maximum likelihood angle estimation of wideband signals using phased array antennas
#25Maximum likelihood angle estimation of wideband signals using phased array antennas
#26Compact single-aperture antenna and direction-finding navigation system
#27Systems and methods for tracking a remote source and orientation control
#28Selective-sampling receiver
#29All-digital line-of-sight (LOS) processor architecture
#30Radio-based direction-finding navigation system using small antenna
#31Radio detection device and method
#32Compact single-aperture antenna and navigation system
#33Radar apparatus
#34Compact antenna system for polarization sensitive null steering and direction-finding
#35ELEVATION ESTIMATION METHOD AND RADAR APPARATUS USING IT
#36Angle of position object location system and method
#37Selective-sampling receiver
#38Methods and apparatus for automotive radar sensors
#39Vehicle positioning and tracking radar system
#40Method for determining the instantaneous polarization of propagating electromagnetic waves
#41Method for establishing direction of arrival by use of signals of opportunity
#42Estimating angle measurements for source tracking using a phased array system
#43Phase difference of arrival geolocation