Communications: directive radio wave systems and devices (e.g. – Transmission through media other than air or free space
Patent
1996-12-13
1999-02-02
Sotomayor, John B.
Communications: directive radio wave systems and devices (e.g.,
Transmission through media other than air or free space
342128, 342129, 342192, 342196, G01S 1388, G01S 1304
Patent
active
058671170
ABSTRACT:
An apparatus and method for detecting an object and determining the range of the object is disclosed. A transmitter, coupled to an antenna, transmits a frequency-modulated probe signal at each of a number of center frequency intervals or steps. A receiver, coupled to the antenna when operating in a monostatic mode or, alternatively, to a separate antenna when operating in a bistatic mode, receives a return signal from a target object resulting from the probe signal. Magnitude and phase information corresponding to the object are measured and stored in a memory at each of the center frequency steps. The range to the object is determined using the magnitude and phase information stored in the memory. The present invention provides for high-resolution probing and object detection in short-range applications. The present invention has a wide range of applications including high-resolution probing of geophysical surfaces and ground-penetration applications. The invention may also be used to measure the relative permittivity of materials.
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Gogineni Sivaprasad
Kanagaratnam Pannirselvam
Sotomayor John B.
The University of Kansas, Center for Research, Incorporated
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