Joseph S Colburn

US Patent:

6864856, Mar 8, 2005

Filed:

Jun 10, 2003

Appl. No.:

10/459117

Inventors:

Jonathan J. Lynch - Oxnard CA, US
Joseph S. Colburn - Malibu CA, US

Assignee:

HRL Laboratories, LLC - Malibu CA

International Classification:

H01Q001/36

US Classification:

343895, 343853

Abstract:

A spiral antenna system optimized to transmit and/or receive linearly polarized signals and circularly polarized signals. The antenna system includes a spiral antenna and a circuit for exciting the spiral antenna to transmit or receive linearly polarized and circularly polarized signals simultaneously.

US Patent:

6870511, Mar 22, 2005

Filed:

Mar 6, 2003

Appl. No.:

10/383385

Inventors:

Jonathan J. Lynch - Oxnard CA, US
Joseph S. Colburn - Los Angeles CA, US

Assignee:

HRL Laboratories, LLC - Malibu CA

International Classification:

H01Q015/24

US Classification:

343767, 343756

Abstract:

A method for designing a multiple layer frequency selective surface structure. An overall response for the structure is specified. The desired response may be modeled as a filter response. Parameters for each of the layers making up the structure that provide the overall response are determined based on the polarization modes between the layers being decoupled. To provide for decoupling, the individual layers are rotated with respect to each other. The overall response of the structure is then calculated and compared to the desired response. Adjustments are made in the parameters of each layer until the calculated response is equal or nearly equal to the desired response.

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:

7109939, Sep 19, 2006

Filed:

Apr 3, 2003

Appl. No.:

10/407057

Inventors:

Jonathan J. Lynch - Oxnard CA, US
Joseph S. Colburn - Los Angeles CA, US

Assignee:

HRL Laboratories, LLC - Malibu CA

International Classification:

H01Q 13/10

US Classification:

343771

Abstract:

An antenna array comprises a substrate; a plurality of projecting, tapering structures disposed in an array and attached to a first major surface of said substrate, the plurality of projecting, tapering structures defining a plurality of waveguides therebetween; and a plurality of box-shaped structures disposed in an array and attached to a second major surface of the substrate, the plurality of box-shaped structures defining a plurality of waveguides therebetween, the plurality of waveguides defined by the plurality of projecting, tapering structures aligning with the plurality of waveguides defined by the plurality of box-shaped structures. The substrate includes a plurality of probes for feeding the plurality waveguides.

US Patent:

7148848, Dec 12, 2006

Filed:

Oct 27, 2004

Appl. No.:

10/974303

Inventors:

Joseph S Colburn - Pacific Palisades CA, US
Adesunloye Obatoyinbo - Cambridge MA, US
Jonathan J Lynch - Oxnard CA, US

Assignee:

General Motors Corporation - Detroit MI

International Classification:

H01Q 1/38
H01Q 21/08

US Classification:

343700MS, 343810

Abstract:

A dual-band monopole antenna includes a ground plane. A metal plate is located a first distance from the ground plane and includes first and second portions connecting to form a first angle therebetween. A slot is formed in the metal plate that isolates a center portion of the metal plate. The dual-band monopole antenna communicates first radio frequency (RF) signals in a first RF band and second RF signals in a second RF band. A feed tab contacts an outer surface of the metal plate and is located the first distance from the ground plane. The first RF signals and the second RF signals are vertical polarized signals. The dual-band monopole antenna produces a radiation pattern that is omnidirectional in the azimuth plane and vertically polarized in a horizontal plane. The first RF band and the second RF band are independently tuned.

US Patent:

7181093, Feb 20, 2007

Filed:

Dec 12, 2003

Appl. No.:

10/735070

Inventors:

Daniel Yap - Newbury Park CA, US
Peter Petre - Oak Park CA, US
Joseph S. Colburn - Los Angeles CA, US

Assignee:

HRL Laboratories, LLC - Malibu CA

International Classification:

G02F 1/01
G02F 1/035
G02B 6/12

US Classification:

385 1, 385 2, 385 14, 385 40

Abstract:

The present invention provides a RF-lightwave modulator with improved efficiency by making use of a broken loop resonator having a gap therein. In the present invention a RF input signal is coupled into a broken loop resonator, thereby producing a RF output signal. An optical modulator connected across the gap receives the RF output signal and modulates a lightwave with the RF output signal to produce a RF modulated lightwave. Because the optical modulator is connected across the gap in the broken loop resonator, the voltage of the RF output signal applied to the optical modulator will be greater than the voltage of the RF input signal applied to the broken loop resonator.

US Patent:

7208710, Apr 24, 2007

Filed:

Aug 14, 2006

Appl. No.:

11/504145

Inventors:

Daniel Gregoire - Thousand Oaks CA, US
Joseph Colburn - Pacific Palisades CA, US

Assignee:

HRL Laboratories, LLC - Malibu CA

International Classification:

H05B 6/70
H05B 6/72

US Classification:

219697, 219746, 219750, 219747, 333230

Abstract:

A method and apparatus for creating uniform heating of an microwave absorptive target. A circularly polarized waveguide mode is created that promotes uniform heating of the microwave absorptive target by rotating a propagated non-uniform field pattern around a central axis of a cylindrical cavity or waveguide. In the process of rotating the field pattern, hot and cold spots in the field pattern are averaged out over time.

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.