Communications: directive radio wave systems and devices (e.g. – Transmission through media other than air or free space
Patent
1992-09-11
1994-07-05
Sotomayor, John B.
Communications: directive radio wave systems and devices (e.g.,
Transmission through media other than air or free space
342 27, G01S 1304
Patent
active
053271394
ABSTRACT:
A method and apparatus for measuring both physical and electrical properties of a dielectric object using sequential spatial and spectral microwave data. The apparatus is a step CW microwave transmitter and receiver with a spatially modulated antenna positioned linearly in the Poynting vector direction. The method removes the antenna dispersion, removes the antenna image, transfers the image plane to the surface, removes diffraction and then removes the nuisance multipath by spatially integrating along the Poynting vector. The result is a clean complex surface reflection coefficient that contains only the subsurface or object plane information. This clean complex surface reflection coefficient may be compared to reflection coefficients of known objects in order to ascertain physical characteristics of the object.
REFERENCES:
patent: 4698634 (1987-10-01), Alongi et al.
patent: 4803489 (1989-02-01), Giori
patent: 4831383 (1989-05-01), Ohnishi et al.
patent: 4839654 (1989-06-01), Ito et al.
patent: 4896116 (1990-01-01), Nagashima et al.
patent: 4937580 (1990-06-01), Wills
patent: 4951055 (1990-08-01), Katayama
patent: 5012248 (1991-04-01), Munro et al.
patent: 5081456 (1992-01-01), Michiguchi et al.
patent: 5130711 (1992-07-01), Kimura et al.
patent: 5153595 (1992-10-01), Harmuth
patent: 5159343 (1992-10-01), Harmuth
J.Durnin,"Exact Solutions for Nondiffracting Beams," The Scaler Theory, J. Opt. Soc. Am. A, vol. 4, No. 4, pp. 651-661, (Apr. 1987).
J. Durnin et al., "Diffraction Free Beams," Physical Review Letters, vol. 48, p. 1499, (Apr. 1987).
D. A. Hill, "Electromagnetic Scattering by Buried Objects of Low Contrast," IEEE Trans. Geosci. Remote Sensing, vol. 26, pp. 195-203, (Mar. 1988).
D. A. Hill, "Near-Field Detection of Buried Dielectric Objects," IEEE Trans. Geosci. Remote Sensing, vol. 26, pp. 364-368, (Mar. 1988).
C. C. Chan et al., "Beam phenomena at and near critical incidence upon dielectric interference," J. Opt. Soc. Am.A, vol. 4, No. 4, pp. 655-663, (Apr. 1987).
O.P. Gupta et al., "Scale Model Experiments to Study Low-Frequency Electromagnetic Resolution of Multiple Conductors," IEEE Trans. Geosci. Remote Sensing, vol. 26, No. 2, pp. 187-194, (Mar. 1988).
D. M. Kerns, Plane-Wave Scattering Matrix Theory of Antennas and Antenna-Antenna Interactions, Nat'l. Bureau of Standards, NBS Monograph 162, Jun. 1981.
Sotomayor John B.
The Boeing Company
LandOfFree
ID microwave holographic sensor does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with ID microwave holographic sensor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and ID microwave holographic sensor will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-798845