Method of determining the ability of a medium to absorb electrom

Details Method of determining the ability of a medium to absorb electrom Method of determining the ability of a medium to absorb electrom

1999-10-14

2000-12-19

Gregory, Bernarr E.

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

Transmission through media other than air or free space

342 27, 342189, 342192, 342195, 342196, G01S 1388, G01V 300

Patent

active

061632929

ABSTRACT:
A method of determining the ability of a medium to absorb electromagnetic waves including placing antenna unit (10) having spaced transmitting and receiving antennas (2 and 3) on a limiting surface of a medium (13), emitting, with the transmitting antenna (2), a radar wave into the medium (13) which is detected as a cross-signal by the receiving antenna (3), pre-processing and digitalizing the cross-signal, and, thereafter, analyzing the cross-signal with an algorithm for determining the ability of the medium to absorb electromagnetic waves and, thereby, a type of the medium; and an electromagnetic sensor the operation of which is based on the method.

REFERENCES:
patent: 4901080 (1990-02-01), McHenry
patent: 5428360 (1995-06-01), Tam et al.
patent: 5910787 (1999-06-01), Berg et al.
patent: 5936568 (1999-08-01), Berg et al.
patent: 6008753 (1999-12-01), Berg et al.

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