Duc Ha Huynh

US Patent:

H002028, Jun 4, 2002

Filed:

Jul 22, 1999

Appl. No.:

09/363701

Inventors:

Thomas Koscica - Clark NJ
Duc Huynh - Upper Darby PA

Assignee:

United States of America - Washington DC

International Classification:

H01Q 1102

US Classification:

343731

Abstract:

A frequency-scan traveling wave antenna receives radio frequency (RF) energy at an input port, passes the energy through a quarter wave transformer to a first radiator element in an array of radiator elements, each pair of radiator elements being connected by a respective delay line. Each radiator element includes an input port of known characteristic impedance connected to an impedance matching section which compensates for that elements radiated power. Each radiator element has an output port with a section of transmission line disposed between a main radiator section of said radiator element and said output port, and impedance matched to the output port. In one embodiment, each delay line includes a plurality of delay line sections, with adjacent delay line sections being mutually perpendicular. In a second embodiment, each delay line includes a plurality of delay line sections disposed in meandering form.

US Patent:

60941723, Jul 25, 2000

Filed:

Jul 30, 1998

Appl. No.:

9/128641

Inventors:

Thomas Koscica - Clark NJ
Duc Huynh - Upper Darby PA

Assignee:

The United States of America as represented by the Secretary of the Army - Washington DC

International Classification:

H01Q 1102

US Classification:

343731

Abstract:

A traveling array antenna which operates at microwave/millimeter frequencies is disclosed in which a like number of radiator elements are arranged in two mirror image branches, an RF signal feed is fed through a 180 degree compensating power splitter to each branch of the antenna array, each of the radiator elements includes an impedance matching transformer connected at its input side and in which a radiator terminating patch is connected to the end of each of the two mirror image branches.

US Patent:

20190018076, Jan 17, 2019

Filed:

Jul 10, 2018

Appl. No.:

16/032040

Inventors:

- Bethesda MD, US
Cedric H. WU - Bethesda MD, US
Yongdan HU - Bethesda MD, US
Kenneth Michael JACKSON - Bethesda MD, US
Gregory Scott BRUCE - Bethesda MD, US
Wilbur LEW - Bethesda MD, US
Andrew Raymond MANDEVILLE - Bethesda MD, US
Duc HUYNH - Bethesda MD, US

Assignee:

LOCKHEED MARTIN CORPORATION - Bethesda MD

International Classification:

G01R 33/032
G01N 21/64
G01N 22/00

Abstract:

A magnetometer for magnetic detection includes a magneto-optical defect center material having at least one magneto-optical defect center; a radio frequency (RF) exciter system including a radio frequency (RF) excitation source; an optical excitation system including an optical excitation source; an optical detector configured to receive an optical signal based on light emitted by the magneto-optical defect center material due RF excitation and optical excitation provided to the magneto-optical defect center material via the RF excitation source and the optical excitation source, respectively; a magnetic field generator configured to generate a magnetic field detected at the magneto-optical defect center material; and a system controller.

US Patent:

20170343618, Nov 30, 2017

Filed:

Dec 15, 2016

Appl. No.:

15/380691

Inventors:

- Bethesda MD, US
Duc Huynh - Princeton Junction NJ, US

Assignee:

Lockheed Martin Corporation - Bethesda MD

International Classification:

G01R 33/032
G01R 33/00

Abstract:

A system for magnetic detection includes a magneto-optical defect center material comprising a plurality of magneto-optical defect centers, an optical light source, an optical detector and a radio frequency (RF) excitation source. The optical light source is configured to provide optical excitation to the magneto-optical defect center material. The optical detector is configured to receive an optical signal emitted by the magneto-optical defect center material, The RF excitation source is configured to provide RF excitation to the magneto-optical defect center material. The RF excitation source includes an RF feed connector, and a plurality of coils, each connected to the RF feed connector, and adjacent the magneto-optical defect center material, the coils each having a spiral shape.

US Patent:

20170212180, Jul 27, 2017

Filed:

Jan 21, 2016

Appl. No.:

15/003309

Inventors:

- Bethesda MD, US
Duc Huynh - Princeton Junction NJ, US
Wilbur Lew - Mount Laurel NJ, US

Assignee:

Lockheed Martin Corporation - Bethesda MD

International Classification:

G01R 33/032

Abstract:

Systems and apparatuses are disclosed for providing a uniform RF field to a nitrogen vacancy center diamond.

US Patent:

20170212182, Jul 27, 2017

Filed:

Jan 21, 2016

Appl. No.:

15/003634

Inventors:

- Bethesda MD, US
Duc Huynh - Princeton Junction NJ, US
Wilbur Lew - Mount Laurel NJ, US

Assignee:

Lockheed Martin Corporation - Bethesda MD

International Classification:

G01R 33/032
G01R 33/00

Abstract:

A magnetic sensor assembly includes a base substrate and a material assembly. The material assembly is formed on the base substrate. The material assembly includes an assembly substrate. A magneto-optical defect center material having a plurality of magneto-optical defect centers is formed on the assembly substrate. A radio frequency (RF) excitation source is formed on the magneto-optical defect center material.

US Patent:

20170212187, Jul 27, 2017

Filed:

Dec 7, 2016

Appl. No.:

15/372201

Inventors:

- Bethesda MD, US
Gregory S. Bruce - Abington NJ, US
Duc Huynh - Princeton Junction NJ, US
Wilbur Lew - Mount Laurel NJ, US

Assignee:

Lockheed Martin Corporation - Bethesda MD

International Classification:

G01R 33/032
G01R 33/00

Abstract:

Systems and apparatuses are disclosed for providing a uniform RF field and magnetic bias field to a nitrogen vacancy center diamond.