Stephen J Hart

US Patent:

6342866, Jan 29, 2002

Filed:

Mar 17, 2000

Appl. No.:

09/527152

Inventors:

Thinh Q. Ho - Anaheim CA
Stephen M. Hart - San Diego CA
Richard C. Adams - San Diego CA

Assignee:

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

International Classification:

H01Q 136

US Classification:

343795, 343853, 343909

Abstract:

A wideband antenna system comprises a stack of m antennas, where m is a positive integer, and m 2. Each antenna includes: a) an electrically insulating substrate; b) opposed first and second radio frequency elements mounted to the substrate; c) a ground feed electrically connected to the first radio frequency element; d) an excitation feed electrically connected to the second radio frequency element; and e) a ground plane mounted to the substrate of the m antenna. The radio frequency elements of each antenna collectively have a unique total area and are mounted to the electrically insulating substrate. The radio frequency elements of the i antenna provide a ground plane for the k antenna, where i and k are positive integers, 1k(i-1), and 2im. The total area of the first and second radio frequency elements of the i antenna is greater than the total area of the first and second radio frequency elements of the k antenna.

US Patent:

6441930, Aug 27, 2002

Filed:

Jun 16, 2000

Appl. No.:

09/595822

Inventors:

Stephen J Hart - San Clemente CA

Assignee:

Voxel, Inc. - Provo UT

International Classification:

G03H 104

US Classification:

359 35, 359 22, 359 23, 359 24, 359 30

Abstract:

A method and apparatus for making holograms includes a technique for exposing a film substrate or other light-sensitive medium to consecutive two dimensional images, together representative of a physical three-dimensional system, to generate a three dimensional hologram of the physical system. Low beam ratios are employed to superimpose multiple (20-300) images on the substrate. Each image is relatively weak, but the combination of the series of weak images ultimately appears as a single clearly defined hologram.

US Patent:

6507252, Jan 14, 2003

Filed:

Jun 21, 2001

Appl. No.:

09/886501

Inventors:

Thinh Q. Ho - Anaheim CA 92802
Stephen M. Hart - San Jose CA 95164
Willard I. Henry - San Diego CA 92154

International Classification:

H01P 1213

US Classification:

333135, 333202, 333210

Abstract:

An integrated circuit multiplexer comprises a waveguide having an interior cavity, first RF input port, and a first and second output ports; a dielectric structure positioned in the cavity; an RF input feed attached to the dielectric structure that extends through the RF input port; a first RF output feed attached to the dielectric structure that extends through the first RF output port; a second RF output feed attached to the dielectric structure that extends through the second RF output port; a first resonator pair mounted to the dielectric structure between the RF input feed and the first RF output feed, and electrically connected to the waveguide; and a second resonator pair mounted to the dielectric structure between the RF input feed and the second RF output feed, and electrically connected to the waveguide so that the first and second resonator pairs are generally coplanar. The waveguide is shaped as a right rectangular prism having a rectangular cross-sectional area characterized by a width L and a depth L , where L (0. 5), L (0. 25), and represents the center wavelength of a radio frequency signal that is input into said waveguide so that the waveguide operates in an evanescent mode in response to receiving the radio frequency signal.

US Patent:

6636336, Oct 21, 2003

Filed:

Oct 4, 2001

Appl. No.:

09/971350

Inventors:

Stephen J. Hart - San Clemente CA

Assignee:

Voxel, Inc. - Provo UT

International Classification:

G03H 104

US Classification:

359 35, 359 1, 359 22, 359 24

Abstract:

A method and apparatus for making holograms includes a technique for exposing a film substrate or other light-sensitive medium to consecutive two dimensional images, together representative of a physical three-dimensional system, to generate a three dimensional hologram of the physical system. Low beam ratios are employed to superimpose multiple (20-300) images on the substrate. Each image is relatively weak, but the combination of the series of weak images ultimately appears as a single clearly defined hologram.

US Patent:

6674554, Jan 6, 2004

Filed:

Oct 4, 2001

Appl. No.:

09/971377

Inventors:

Stephen J Hart - San Clemente CA

Assignee:

Voxel, Inc. - Provo UT

International Classification:

G03H 128

US Classification:

359 25, 359 22, 359 35, 359 30

Abstract:

A method and apparatus for making holograms includes a technique for exposing a film substrate or other light-sensitive medium to consecutive two dimensional images, together representative of a physical three-dimensional system, to generate a three dimensional hologram of the physical system. Low beam ratios are employed to superimpose multiple (20-300) images on the substrate. Each image is relatively weak, but the combination of the series of weak images ultimately appears as a single clearly defined hologram.

US Patent:

8014745, Sep 6, 2011

Filed:

Feb 20, 2009

Appl. No.:

12/389610

Inventors:

Thinh Q. Ho - Anaheim CA, US
Stephen M. Hart - San Jose CA, US

Assignee:

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

International Classification:

H04B 15/00

US Classification:

4552781

Abstract:

A compensation apparatus for an integrated communication system is disclosed. The integrated communication system can include a first communication device having a first transmitter antenna, and a second communication device having a second receiver antenna, wherein the second receiver antenna is in appreciable proximity of the first transmitter antenna such that the second receiver antenna picks up substantial electromagnetic interference from the first communication device. The compensation apparatus can include an isolation device having compensation circuitry coupling the first transmitter antenna and the second receiver antenna and configured to adaptively cancel the electromagnetic interference from the first communication device at the second receiver antenna.

US Patent:

20020071146, Jun 13, 2002

Filed:

Oct 4, 2001

Appl. No.:

09/970868

Inventors:

Stephen Hart - San Clemente CA, US

International Classification:

G02B005/32
G03H001/04

US Classification:

359/035000, 359/021000

Abstract:

A method and apparatus for making holograms includes a technique for exposing a film substrate or other light-sensitive medium to consecutive two dimensional images, together representative of a physical three-dimensional system, to generate a three dimensional hologram of the physical system. Low beam ratios are employed to superimpose multiple (20-300) images on the substrate. Each image is relatively weak, but the combination of the series of weak images ultimately appears as a single clearly defined hologram.

US Patent:

20060203502, Sep 14, 2006

Filed:

Mar 2, 2006

Appl. No.:

11/367086

Inventors:

Peter Stevens - Salt Lake City UT, US
John Stevens - Salt Lake City UT, US
Stephen Hart - San Juan Capistrano CA, US

International Classification:

F21V 9/00

US Classification:

362497000, 362511000

Abstract:

A license plate frame has a pattern formed on a first side. At least one light source is embedded within the license plate frame. A power source is connected to the light source. Light emitted by the light source only escapes from the pattern.