Tracking circuit for following objects through antenna nulls

Details Tracking circuit for following objects through antenna nulls Tracking circuit for following objects through antenna nulls

1987-04-20

1989-02-21

Blum, Theodore M.

Communications: directive radio wave systems and devices (e.g.,

Return signal controls radar system

Receiver

342 77, 342442, 331 17, 331 25, 375 82, 329105, 329123, 328155, 307513, G01S 1368, H03L 710, H03D 318

Patent

active

048069345

ABSTRACT:
A circuit for removing abrupt phase changes in a received signal, such as those caused when an object tracking system's directional receiving antenna becomes misaligned with the tracked object. The circuit uses a phase detector to determine when an abrupt phase change has occurred, such as when a signal returned from the tracked object aligns with an antenna null and reverses the phase of a control signal fed to a phase locked oscillator. A delaying low pass filter insures the control signal is stable before it is fed to the phase locked oscillator.

REFERENCES:
patent: 3109143 (1963-10-01), Gluth
patent: 3444556 (1969-05-01), Bellinger et al.
patent: 3600700 (1971-08-01), Matsuo
patent: 3716802 (1973-02-01), Muratani et al.
patent: 3727227 (1973-04-01), Takao et al.
patent: 3728730 (1973-04-01), Takao et al.
patent: 3772695 (1973-11-01), Hoffman
patent: 3787775 (1974-01-01), Lanning
patent: 3859658 (1975-01-01), Rabow
patent: 3883806 (1975-05-01), DeLong et al.
patent: 3906376 (1975-09-01), Bass
patent: 3956748 (1976-05-01), Rymes
patent: 3961172 (1976-06-01), Hutcheon
patent: 4010467 (1977-03-01), Slivka
patent: 4029900 (1977-06-01), Addeo
patent: 4135191 (1979-01-01), Sawicki
patent: 4217551 (1980-08-01), Entenman
patent: 4257007 (1981-03-01), Brooks et al.
patent: 4346477 (1982-08-01), Gordy
patent: 4394626 (1983-07-01), Kurihara et al.

Affiliated with

Also associated with

Rating

Tracking circuit for following objects through antenna nulls does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Tracking circuit for following objects through antenna nulls, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tracking circuit for following objects through antenna nulls will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1525586