Apparatus using continuous-wave radiation for detecting and locating targets hidden behind a surface
First Claim
1. Apparatus for detecting a target hidden behind a surface, comprising:
- a transmitter that transmits a beam of continuous-wave radiation;
a first receiver disposed to receive such radiation reflected from a target; and
a second receiver disposed to receive such radiation reflected from the target, whereinthe receivers are spaced from the transmitter and are spaced from one another according to predetermined spatial relationships such that the electrical signal phase of reflected radiation received by the first receiver is in electrical signal quadrature with the electrical signal phase of reflective radiation received by the second receiver, and wherein the apparatus further comprises circuitry that combines signals derived from the receivers to produce an output.
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Accused Products
Abstract
Continuous-wave radiation is used to detect a target hidden behind a surface. In an embodiment, a transmitter directs a beam of continuous-wave microwave radiation from a transmitting location, and reflected radiation from the target is received at first and second receiving locations closer to the surface than the transmitting location. The transmitting and receiving locations have spatial relationships such that the phase of reflected radiation received at one receiving location is in quadrature with the phase of reflected radiation received at the other receiving location. In an embodiment, direct transmitted radiation is received at the receiving locations in quadrature.
54 Citations
18 Claims
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1. Apparatus for detecting a target hidden behind a surface, comprising:
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a transmitter that transmits a beam of continuous-wave radiation; a first receiver disposed to receive such radiation reflected from a target; and a second receiver disposed to receive such radiation reflected from the target, wherein the receivers are spaced from the transmitter and are spaced from one another according to predetermined spatial relationships such that the electrical signal phase of reflected radiation received by the first receiver is in electrical signal quadrature with the electrical signal phase of reflective radiation received by the second receiver, and wherein the apparatus further comprises circuitry that combines signals derived from the receivers to produce an output. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification