Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1981-05-29
1984-05-22
Wilbur, Maynard R.
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
343 5FT, G01S 900
Patent
active
044504446
ABSTRACT:
An apparatus is disclosed by which radar targets can be imaged in two dimions for identification at full radar range using relatively moderate speed data processing. Images of targets are found in range and cross-range dimensions from the time history of the targets' wideband spectral response obtained by a frequency stepping radar. A frequency synthesizer generates a series of N identical signal bursts, each burst comprising n pulses and each of said n pulses being a different frequency. The radar echos from this series of bursts is separated into n-phase and quadrature phase components. These components are processed to calculate and store the relative amplitude of each echo signal and to determine the phase of each echo signal relative to the phase of the corresponding transmitted pulse. Further, the echo signals are inverse Fourier Transformed to generate an n.times.N Fourier Transform array representing a synthetic target range profile. The series of N range profile signatures is Fourier Transformed, range cell by range cell, to obtain the Doppler spectrum for each range cell. The resulting Doppler frequencies in each range cell are proportional to the target's angular rate of aspect change relative to the radar and the scatterer cross-range location in the range cell relative to an arbitrary aspect rotation act.
REFERENCES:
patent: 3885224 (1975-05-01), Klahr
patent: 4339752 (1982-07-01), Williams et al.
Prickett Michael J.
Wehner Donald R.
Beers R. F.
Fendelman Harvey
Gordon M. R.
Johnston E. F
The United States of America as represented by the Secretary of
LandOfFree
Stepped frequency radar target imaging does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Stepped frequency radar target imaging, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Stepped frequency radar target imaging will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1481055