Polarization correlation target seeker

Details Polarization correlation target seeker Polarization correlation target seeker

1976-09-28

1978-08-15

Wilbur, Maynard R.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

244 319, 343 175, 343100CL, 343100PE, G01S 902, F41G 700, H04B 710

Patent

active

041076788

ABSTRACT:
A target seeker circuit contained in a projectile having a trajectory guidance mechanism cross-correlates returns of a cross-polarized antenna pattern to distinguish between target returns reflected by man-made targets and clutter returns reflected by naturally occurring articles to cause the trajectory guidance mechanism to direct the projectile towards the target. One coordinate of diversity in the cross-polarized returns is achieved by changing the RF frequency of the antenna pattern while a second coordinate of diversity is achieved by changing the aspect range of the clutter. The target returns are distinguished from the clutter returns either by comparison to a threshold value which is set in relation to the worst case clutter level or, alternatively, by comparison to an adaptive threshold which is responsive to the dynamic clutter level.

REFERENCES:
patent: 3202990 (1965-08-01), Howells
patent: 3290684 (1966-12-01), Renn et al.
patent: 3832711 (1974-08-01), Grant et al.

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