Direction-finding method and system

Communications: radio wave antennas – Antennas – Balanced doublet - centerfed

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

343106D, 343100CL, G01S 502

Patent

active

040191842

ABSTRACT:
High-frequency waves transmitted by a rotating antenna array at a ground tion are intercepted by an airborne receiver for photoelectric evaluation by one or more discs whose light transmissivity, by translumination or reflection, varies periodically according to a sinusoidal law in one diametral direction while being constant in another diametral direction orthogonal thereto. The disc or discs are rotated at a speed corresponding to that of the transmitting antenna array, under the control of periodic synchronizing pulses, and are illuminated by a flux modulated by an electrical signal derived from the incoming wave, this signal containing a phase component dependent on two spatial coordinates such as elevational and azimuthal angles determining the relative position of the ground transmitter and the airborne receiver. The flux optically filtered by any such disc has a peak at a point determined by the spatial coordinates whereby the relative position can be visualized by a display device such as a vidicon camera and an associated oscilloscope screen. Parasitic components due to reflections from moving objects can be suppressed by integration of the optically filtered flux over a limited period.

REFERENCES:
patent: 2644158 (1953-06-01), Thrift
patent: 3181159 (1965-04-01), Kramar et al.
patent: 3641447 (1972-02-01), Gaines et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Direction-finding method and system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Direction-finding method and system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Direction-finding method and system will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-106405

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.