James G Tonti

US Patent:

6522152, Feb 18, 2003

Filed:

Nov 15, 2000

Appl. No.:

09/713383

Inventors:

James G. Tonti - Valkaria FL
James A. Patterson - Tempe AZ
James R. Sciacero - Scottsdale AZ

Assignee:

Microtest Inc. - Phoenix AZ

International Classification:

G01R 2704

US Classification:

324628, 324543

Abstract:

An Adaptive Vector Cancellation method which uses time domain data for an instrument connection to estimate magnitude, phase, and time position of a signal response such as NEXT or Return Loss associated with the connection. Based on the estimate of the amplitude and time of the connection response, a suitable full-bandwidth frequency response that corresponds to a point source of NEXT or Return Loss is determined. This calculated connector response is then scaled to an appropriate magnitude, phase and time shifted to the estimated position of the actual connection. The scaled/shifted response is then vectorially combined with the measured sweep data to suitably cancel the connection contribution to NEXT and/or Return Loss. Thus, the amount of NEXT or return loss existing in the users patch cord is preserved, while the NEXT or return loss due to the instrument connection is suitably suppressed. Correction is done in the frequency domain, over the full bandwidth of the measured data.

US Patent:

6636048, Oct 21, 2003

Filed:

Jun 18, 2002

Appl. No.:

10/177627

Inventors:

James R. Sciacero - Scottsdale AZ
James G. Tonti - Valkaria FL

Assignee:

Microbest, Inc. - Phoenix AZ

International Classification:

G01R 2704

US Classification:

324520, 324628, 324 7619, 324539

Abstract:

The present invention provides an apparatus for using time domain analysis of NEXT, Return Loss and the like, in conjunction with the application of time or distance referenced limits to verify and determine compliance of the performance requirements of connections in a typical link. Time domain analysis of NEXT, Return Loss data and the like suitably provides the performance characteristics of a link as a function of time or distance. When coupled with time or distance performance curves for connections, it can be determined if the transmission fault is at a connection or in the cable. The time limit curves for connections can be generated based on the frequency domain performance requirements for connecting hardware of a specific level of performance. The connection time limit curves thus allows one to determine if the connection is within performance standards, allowing improved isolation of the fault condition.

US Patent:

7642850, Jan 5, 2010

Filed:

Apr 2, 2008

Appl. No.:

12/061013

Inventors:

G. Patrick Martin - Merritt Island FL, US
Christopher D. Moffatt - Palm Bay FL, US
James Tonti - Valkaria FL, US

Assignee:

Harris Corporation - Melbourne FL

International Classification:

H03F 1/26

US Classification:

330151

Abstract:

RF amplifier system () incorporating feedforward linearization. The system includes a digital waveform source () generating digital data s(t) representative of at least one analog signal. The system also includes a feedforward linearization circuit for reducing a distortion of an RF power amplifier (). The feedforward linearization circuit includes a differential amplifier () arranged for generating an error signal. The error signal is determined based on a difference between the distorted RF output signal and an analog RF reference signal () generated from the digital data.

US Patent:

7676205, Mar 9, 2010

Filed:

Sep 18, 2006

Appl. No.:

11/532642

Inventors:

Christopher D. Moffatt - Palm Bay FL, US
James Tonti - Valkaria FL, US
Gary J. Headley - Palm Bay FL, US

Assignee:

Harris Corporation - Melbourne FL

International Classification:

H04B 17/00
G01S 3/02

US Classification:

4552261, 342458

Abstract:

Method () and system () for actively detecting and determining a range of a remotely located radio receiver (). The invention also provides a method and system to determine whether a remote receiver () is receiving a transmitted signal () and the minimum necessary transmitter power required to establish a communication link to the receiver (). Finally, the invention also provides a method and system to resolve directional ambiguities due to multipath.

US Patent:

8019015, Sep 13, 2011

Filed:

Feb 26, 2007

Appl. No.:

11/678847

Inventors:

Christopher D. Moffatt - Palm Bay FL, US
G. Patrick Martin - Merritt Island FL, US
James Tonti - Valkaria FL, US

Assignee:

Harris Corporation - Melbourne FL

International Classification:

H04K 1/02
H04L 25/03
H04L 25/49

US Classification:

375297, 375296

Abstract:

Predistorting an input signal prior to amplification in an RF power amplifier () includes isolating a plurality sub-band signals, each representing a portion of the input signal s(t). The method includes independently modifying an amplitude and a phase of each of the plurality of sub-band signals. The modification of the amplitude and/or phase is performed using a set of signal weighting parameters (weights) w and W, controlling linear and nonlinear modifications respectively, which are determined in an adaptive process by an adaptive controller (). After modification, each of the sub-bands are summed together to obtain a predistorted input signal for an RF power amplifier ().

US Patent:

8649021, Feb 11, 2014

Filed:

May 6, 2011

Appl. No.:

13/102619

Inventors:

Robert M. Montgomery - Indialantic FL, US
Randy L. Carmean - Malabar FL, US
James G. Tonti - Malabar FL, US

Assignee:

Harris Corporation - Melbourne FL

International Classification:

G01B 11/02
G01B 9/02

US Classification:

356502, 356482

Abstract:

A sensing apparatus comprises an excitation source configured to induce waves in a target, and a fiber optic interferometer configured to sense the induced waves in the target. The fiber optic interferometer comprises a probe segment having a probe segment end, and an adjustable coupler configured to permit setting a gap between the probe segment end and the target. A controller is coupled to the adjustable coupler and configured to set the gap between the probe segment end and the target.

US Patent:

8649022, Feb 11, 2014

Filed:

May 6, 2011

Appl. No.:

13/102686

Inventors:

Robert M. Montgomery - Indialantic FL, US
Randy L. Carmean - Malabar FL, US
James G. Tonti - Malabar FL, US

Assignee:

Harris Corporation - Melbourne FL

International Classification:

G01B 11/02
G01B 9/02

US Classification:

356502, 356482

Abstract:

A material sensing apparatus comprises an excitation source configured to induce waves in a workpiece, and an optical waveguide interferometer configured to sense the induced waves in the workpiece. The optical waveguide interferometer comprises a probe segment having a probe segment end, and an adjustable coupler configured to permit setting a gap between the probe segment end and the workpiece. A controller is coupled to the adjustable coupler and configured to set the gap between the probe segment end and the workpiece.

US Patent:

20120280862, Nov 8, 2012

Filed:

May 3, 2011

Appl. No.:

13/099472

Inventors:

Christopher Douglas MOFFATT - Palm Bay FL, US
James G. Tonti - Valkaria FL, US

Assignee:

Harris Corporation - Melbourne FL

International Classification:

G01S 1/08
G01S 1/02

US Classification:

342386, 342385

Abstract:

The wireless detection beacon is for use with a Radio Frequency (RF) interrogator transmitting at a first frequency and receiving at a second frequency. The wireless detection beacon includes a substrate, a power supply carried by the substrate, an antenna assembly carried by the substrate, and a local oscillator (LO) carried by the substrate and configured to be powered by the power supply to provide an LO signal at a third frequency. A mixer is carried by the substrate and coupled to the antenna assembly and the LO. The mixer is configured to generate an outgoing beacon signal to the antenna assembly at the second frequency based upon mixing an incoming signal from the RF interrogator at the first frequency with the LO signal at the third frequency.