Joseph Charles Colburn

US Patent:

7042403, May 9, 2006

Filed:

Jan 23, 2004

Appl. No.:

10/764014

Inventors:

Joseph S. Colburn - Los Angeles CA, US
Daniel F. Sievenpiper - Los Angeles CA, US

Assignee:

General Motors Corporation - Detroit MI

International Classification:

H01Q 1/24
H01Q 1/48

US Classification:

343702, 343846

Abstract:

A low-profile dual-band antenna includes a ground plane. An “E”-shaped metal plate is located a first distance from the ground plane and includes first and second outer extensions and an inner extension of the metal plate. A feed tab connects the inner extension and the ground plane. A shorting tab connects the inner extension and the ground plane. The low-profile dual-band antenna communicates first radio frequency (RF) signals in a first RF band and second RF signals in a second RF band. The first RF signals and the second RF signals are vertical polarized signals. The low-profile dual-band antenna produces a radiation pattern that is omnidirectional in the azimuth plane and vertically polarized in a horizontal plane when communicating the first RF signals and the second RF signals. The first RF band and the second RF band can be independently tuned.

US Patent:

7218281, May 15, 2007

Filed:

Jul 1, 2005

Appl. No.:

11/173187

Inventors:

Daniel F. Sievenpiper - Santa Monica CA, US
Joseph S. Colburn - Malibu CA, US
Bryan Ho Lim Fong - Los Angeles CA, US
Matthew W. Ganz - Marina del Rey CA, US
Mark F. Gyure - Oak Park CA, US
Jonathan J. Lynch - Oxnard CA, US
John Ottusch - Malibu CA, US
John L. Visher - Malibu CA, US

Assignee:

HRL Laboratories, LLC - Malibu CA

International Classification:

H01Q 1/38

US Classification:

343700MS, 343909

Abstract:

A method for guiding waves over objects, a method for improving a performance of an antenna, and a method for improving a performance of a radar are disclosed. The methods disclosed teach how an impedance structure can be used to guide waves over objects.

US Patent:

7830310, Nov 9, 2010

Filed:

Jul 1, 2005

Appl. No.:

11/173182

Inventors:

Daniel F. Sievenpiper - Santa Monica CA, US
Joseph S. Colburn - Malibu CA, US
Bryan Ho Lim Fong - Los Angeles CA, US
Matthew W. Ganz - Marina del Rey CA, US
Mark F. Gyure - Oak Park CA, US
Jonathan J. Lynch - Oxnard CA, US
John Ottusch - Malibu CA, US
John L. Visher - Malibu CA, US

Assignee:

HRL Laboratories, LLC - Malibu CA

International Classification:

H01Q 1/38

US Classification:

343700MS, 343909

Abstract:

An artificial impedance structure and a method for manufacturing same. The structure contains a dielectric layer having generally opposed first and second surfaces, a conductive layer disposed on the first surface, and a plurality of conductive structures disposed on the second surface to provide a preselected impedance profile along the second surface.

US Patent:

7911407, Mar 22, 2011

Filed:

Jun 12, 2008

Appl. No.:

12/138083

Inventors:

Bryan Ho Lim Fong - Los Angeles CA, US
Joseph S. Colburn - Malibu CA, US
Paul R. Herz - Santa Monica CA, US
John J. Ottusch - Malibu CA, US
Daniel F. Sievenpiper - Santa Monica CA, US
John L. Visher - Malibu CA, US

Assignee:

HRL Laboratories, LLC - Malibu CA

International Classification:

H01Q 15/02
H01Q 1/38

US Classification:

343909, 343700 MS, 343754

Abstract:

A method for designing artificial impedance surfaces is disclosed. The method involves matching impedance component values required for a given far-field radiation pattern (determined, for example, by holographic means) with measured or simulated impedance component values for the units of a lattice of conductive structures used to create an artificial impedance surface, where the units of the lattice have varied geometry. For example, a unit could be a square conductive structure with a slice (removed or missing material) through it. The measured or simulated impedance components are determined by measuring wavevector values for test surfaces in three or more directions over any number of test surfaces, where each unit of a given test surface has the same geometric shape and proportions as all of the other units of that test surface, but each test surface has some form of variation in the unit geometry from the other test surfaces. These test measurements create a table of geometry vs. impedance components that are used to design the artificial impedance structure.

US Patent:

7929147, Apr 19, 2011

Filed:

May 31, 2008

Appl. No.:

12/156445

Inventors:

Bryan H. Fong - Los Angeles CA, US
Joseph S. Colburn - Malibu CA, US
John Ottusch - Malibu CA, US
Daniel F. Sievenpiper - Los Angeles CA, US
John L. Visher - Malibu CA, US

Assignee:

HRL Laboratories, LLC - Malibu CA

International Classification:

G01B 11/02
H01Q 15/02
H01Q 15/24

US Classification:

356496, 343909

Abstract:

A method and system for determining an optimized artificial impedance surface is disclosed. An artificial impedance pattern is calculated on an impedance surface using an optical holographic technique given an assumed surface wave profile and a desired far field radiation pattern. Then, an actual surface wave profile produced on the impedance surface from the artificial impedance pattern, and an actual far field radiation pattern produced by the actual surface wave profile are calculated. An optimized artificial impedance pattern is then calculated by iteratively re-calculating the artificial impedance pattern from the actual surface wave profile and the desired far field radiation pattern. An artificial impedance surface is determined by mapping the optimized artificial impedance pattern onto a representation of a physical surface.

US Patent:

8436785, May 7, 2013

Filed:

Nov 3, 2010

Appl. No.:

12/939040

Inventors:

Anthony Lai - Los Angeles CA, US
Joseph S. Colburn - Malibu CA, US

Assignee:

HRL Laboratories, LLC - Malibu CA

International Classification:

H01Q 15/02
H01Q 9/00

US Classification:

343909, 343745, 343754

Abstract:

A method of delaying the onset of a backward wave mode in a frequency selective surface having a two dimensional array of conductive patches or elements and an RF ground plane, the two dimensional array of patches or elements being interconnected by variable capacitors, the method comprising separating grounds associated with the variable capacitors from the RF ground plane and providing a separate conductive mesh structure or arrangement as a bias voltage ground for the variable capacitors. A tunable impedance surface comprises a RF ground plane; a plurality of patches or elements disposed in an array a distance from the ground plane; a capacitor arrangement for controllably varying capacitance between at least selected ones of adjacent patches or elements in the array; and a grounding mesh associated with the capacitor arrangement for providing a control voltage ground to capacitors in the capacitor arrangement, the grounding mesh being spaced from the RF ground plane by dielectric material.

US Patent:

20090058731, Mar 5, 2009

Filed:

Aug 30, 2007

Appl. No.:

11/847372

Inventors:

Kevin Geary - Los Angeles CA, US
James H. Schaffner - Chatsworth CA, US
Hui-Pin Hsu - Northridge CA, US
Joseph S. Colburn - Malibu CA, US
Hyok J. Song - Camarillo CA, US

Assignee:

GM GLOBAL TECHNOLOGY OPERATIONS, INC. - DETROIT MI

International Classification:

H01Q 9/04

US Classification:

343700MS

Abstract:

One or more of the embodiments of a dual band stacked patch antenna described herein employ an integrated arrangement of a global positioning system (GPS) antenna and a satellite digital audio radio service (SDARS) antenna. The dual band antenna receives right hand circularly polarized GPS signals in a first frequency band, left hand circularly polarized SDARS signals in a second frequency band, and vertical linear polarized SDARS signals in the second band. The dual band antenna includes a ground plane element, an upper radiating element (which is primarily utilized to receive SDARS signals), dielectric material between the ground plane element and the upper radiating element, and a lower radiating element (which is primarily utilized to receive GPS signals) surrounded by the dielectric material. The dual band antenna uses only one conductive signal feed to receive both GPS and SDARS signals.