Communications: directive radio wave systems and devices (e.g. – Plural radar
Patent
1986-10-29
1989-04-04
Tubbesing, T. H.
Communications: directive radio wave systems and devices (e.g.,
Plural radar
342 70, 342113, 307516, 328134, G01S 1393
Patent
active
048189995
ABSTRACT:
A system for deriving direct digital indications of frequency and phase difference between two incoming pulse trains adaptable for collision avoidance systems or the like.
A pair of radar beams 152 and 152A are directed toward a target 153 and corresponding beams 154 and 154A returning therefrom are detected. A digital difference circuit 110 forms a pulse train 66 from the Doppler shift frequencies of each beam pair having a repetition rate functionally related to the difference in magnitude of the shift frequencies. Pulses from the pulse train are counted as a function of time. Visual indications thereof on display 144 are correlative to target position relative to beams 152 and 152A.
REFERENCES:
patent: 3058063 (1962-10-01), Sher
patent: 3327307 (1967-06-01), Miles
patent: 3588710 (1971-06-01), Masters
patent: 3634771 (1972-01-01), Hermel
patent: 3646455 (1972-02-01), Coccagna
patent: 4020422 (1977-04-01), Underhill
patent: 4148028 (1979-04-01), Fujiki
patent: 4151473 (1979-04-01), Coleman et al.
patent: 4333055 (1982-06-01), Crackel
patent: 4354124 (1982-10-01), Shima et al.
patent: 4378509 (1983-03-01), Hatchett et al.
Cunningham Allen R.
Kobayashi Herbert S.
Lichtenberg Christopher L.
Shores Paul W.
Barr Hardie R.
Fein Edward K.
Manning John R.
The United States of America as represented by the Administrator
Tubbesing T. H.
LandOfFree
Method and apparatus for measuring frequency and phase differenc does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for measuring frequency and phase differenc, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for measuring frequency and phase differenc will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-182532