Patents

US 7656342 B2: Double-sideband suppressed-carrier radar to null near-field reflections from a first interface between media layers

Granted: 2010-02-02
Filed: 2007-10-23 application 11877655
Type: Utility · 15 claims
Elsewhere: Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗

Abstract

A ground-penetrating radar comprises a software-definable transmitter for launching pairs of widely separated and coherent continuous waves. Each pair is separated by a constant or variable different amount double-sideband suppressed carrier modulation such as 10 MHz, 20 MHz, and 30 MHz Processing suppresses the larger first interface reflection and emphasizes the smaller second, third, etc. reflections. Processing determines the electrical parameter of the natural medium adjacent to the antenna.The modulation process may be the variable or constant frequency difference between pairs of frequencies. If a variable frequency is used in modulation, pairs of tunable resonant microstrip patch antennas (resonant microstrip patch antenna) can be used in the antenna design. If a constant frequency difference is used in the software-defined transceiver, a wide-bandwidth antenna design is used featuring a swept or stepped-frequency continuous-wave (SFCW) radar design.The received modulation signal has a phase range that starts at 0-degrees at the transmitter antenna, which is near the first interface surface. After coherent demodulation, the first reflection is suppressed. The pair of antennas may increase suppression. Then the modulation signal phase is changed by 90-degrees and the first interface signal is measured to determine the in situ electrical parameters of the natural medium.Deep reflections at 90-degrees and 270-degrees create maximum reflection and will be illuminated with modulation signal peaks. Quadrature detection, mixing, and down-conversion result in 0-degree and 180-degree reflections effectively dropping out in demodulation.

Source: PVGPATDIS, file of 2026-04-10 (ipg100202.xml).

Assignees

Assignee	Type	Place	Also on furp.org	Source
Stolar, Inc. 17 patents	US company or organization	Raton, NM		PVGPATDIS, file of 2026-04-10

Inventors

Inventor	Place	Patents	Source
Larry G. Stolarczyk	Raton, NM	16	PVGPATDIS, file of 2026-04-10
Igor Bausov	Raton, NM	10	PVGPATDIS, file of 2026-04-10
Richard Brewster Main	Elk Grove, CA	9	PVGPATDIS, file of 2026-04-10

CPC categories

Subclass	Category	First group	Source
G01S	Radio direction-finding; radio navigation; determining distance or velocity by use of radio waves; locating or presence-detecting by use of the reflection or reradiation of radio waves; analogous arrangements using other waves	G01S7/02	PVGPATDIS, file of 2026-04-10
G01V	Geophysics; gravitational measurements; detecting masses or objects; tags	G01V3/12	PVGPATDIS, file of 2026-04-10

Cooperative Patent Classification, as currently assigned (one row per subclass).

Assignments and security interests

Recorded	What	From	To	Reel/frame	Source
2010-01-06	Assignment Assignment of assignor's interest	BAUSOV, IGOR signed 2009-11-18 STOLARCZYK, GERALD L. signed 2009-11-18 STOLARCZYK, LARRY G. signed 2009-12-21 MAIN, RICHARD BREWSTER signed 2010-01-06	STOLAR, INC. RATON, NM	23744/582	ECORSEXC, file of 2026-09-25

Documents recorded with the USPTO Assignment Recordation Branch that list this patent. A security interest is a lender’s claim on the patent as collateral; a release ends it.

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