Allen K Tran

US Patent:

6373436, Apr 16, 2002

Filed:

Oct 29, 1999

Appl. No.:

09/430587

Inventors:

Allen Minh-Triet Tran - San Diego CA

Assignee:

Qualcomm Incorporated - San Diego CA

International Classification:

H01Q 124

US Classification:

343702, 373700 MS

Abstract:

A dual strip antenna that includes first and second conductive strips, each made from a conductive material. The first and second strips are separated by a dielectric substrate having a predetermined thickness. The first strip is electrically connected to the second strip at one end. A coaxial signal feed is coupled to the dual strip antenna. A dual strip antenna can be reduced in overall size by utilizing a periodic mesh patterned conductive surface in place of a solid continuous conductive surface. The periodic mesh pattern maintains the relative voltage and current relationships across the antenna strip while enabling a reduction in physical size. Any uniform periodic mesh pattern may be used and the periodic mesh pattern may be utilized for both strip elements. A brick-wall mesh pattern results in approximately 10% reduction in size over a solid continuous dual strip antenna.

US Patent:

6469669, Oct 22, 2002

Filed:

Feb 16, 2000

Appl. No.:

09/505232

Inventors:

Allen Minh-Triet Tran - San Diego CA

Assignee:

Qualcomm Incorporated - San Diego CA

International Classification:

H01Q 124

US Classification:

343702, 343893, 343901, 343876

Abstract:

A hybrid antenna system for a portable Wireless Communication Device (WCD) includes a concealed, internal shielded substrate antenna fixedly mounted to and wholly internally within a casing of the portable WCD. The hybrid antenna system also includes a displaceable antenna, such as a whip antenna, that is selectively extendable from and retractable within the casing. The antenna system includes a mechanism for electrically connecting the displaceable antenna to internal RF circuitry of the portable WCD when the displaceable antenna is in an extended position and for electrically isolating the displaceable antenna from the internal RF circuitry when the displaceable antenna is in a retracted position within the casing.

US Patent:

6608599, Aug 19, 2003

Filed:

Oct 26, 2001

Appl. No.:

10/044193

Inventors:

Allen Tran - San Diego CA

Assignee:

Qualcomm, Incorporated - San Diego CA

International Classification:

H01Q 928

US Classification:

343795, 343801, 343813

Abstract:

A printed conductive mesh dipole antenna, and a method of use of the antenna. The printed dipole antenna includes a dielectric substrate and a conductive mesh formed of a plurality of symmetric shapes printed on the dielectric substrate. Each of the symmetric shapes is coupled to at least one other of the shapes, and placed periodically on the dielectric substrate proximate to at least one other of the shapes. The periodic placement of the shapes forms a symmetric pattern of a conductive mesh on the dielectric substrate. The antenna is preferably part of a cellular or cordless telephone handset.

US Patent:

6724345, Apr 20, 2004

Filed:

Apr 22, 2002

Appl. No.:

10/128764

Inventors:

Allen Tran - San Diego CA

Assignee:

Kyocera Wirless Corp. - San Diego CA

International Classification:

H01Q 136

US Classification:

343700MS, 343846

Abstract:

A family of antennas, and a method for the same, are provided. The antennas include periodic electromagnetic structures to suppress non-radiating modes of propagation. Each antenna comprises a radiator resonant at a first frequency. A first dielectric is proximate to the radiator. Typically, a counterpoise is formed to the radiator. The periodic electromagnetic structures propagate a radiating mode, and suppress the propagation of a non-radiating mode. The periodic electromagnetic structures can be formed in the radiator, the counterpoise (when the counterpoise is distinctly distinguishable from the radiator), or in the first dielectric. The electromagnetic structures are a pattern of volumetric dielectric blocks having a predetermined shape and a predetermined spacing between blocks. For example, the shapes can be cylindrical blocks having predetermined diameters, cross-shaped blocks having predetermined arm widths and arm lengths, rectangular blocks having predetermined lengths and widths, or semi-spherical blocks having predetermined diameters.

US Patent:

6741211, May 25, 2004

Filed:

Apr 11, 2002

Appl. No.:

10/121773

Inventors:

Stanley S. Toncich - San Diego CA
Allen Tran - San Diego CA

Assignee:

Kyocera Wireless Corp. - San Diego CA

International Classification:

H01Q 138

US Classification:

343700MS, 343895

Abstract:

A family of FE dielectric-tuned antennas and a method for frequency tuning a wireless communications antenna are provided. The method comprises: forming a radiator; forming a dielectrict with ferroelectric material proximate to the radiator; applying a voltage to the ferroelectric material; in response to applying the voltage, generating a dielectric constant; and, in response to the dielectric constant, communicating electromagnetic fields at a resonant frequency. Some aspects of the method further comprise: varying the applied voltage; and, modifying the resonant frequency in response to changes in the applied voltage. Modifying the resonant frequency includes forming an antenna with a variable operating frequency responsive to the applied voltage. Alternately stated, forming an antenna with a variable operating frequency includes forming an antenna with a predetermined fixed characteristic impedance, independent of the resonant frequency.

US Patent:

6741217, May 25, 2004

Filed:

Apr 11, 2002

Appl. No.:

10/122968

Inventors:

Stanley S. Toncich - San Diego CA
Allen Tran - San Diego CA

Assignee:

Kyocera Wireless Corp. - San Diego CA

International Classification:

H01Q 1110

US Classification:

343772, 343785

Abstract:

A family of FE dielectric-tuned antennas and a method for frequency tuning a wireless communications antenna are provided. The method comprises: forming a radiator; forming a dielectric with ferroelectric material proximate to the radiator; applying a voltage to the ferroelectric material; in response to applying the voltage, generating a dielectric constant; and, in response to the dielectric constant, communicating electromagnetic fields at a resonant frequency. Some aspects of the method further comprise: varying the applied voltage; and, modifying the resonant frequency in response to changes in the applied voltage. Modifying the resonant frequency includes forming an antenna with a variable operating frequency responsive to the applied voltage. Alternately stated, forming an antenna with a variable operating frequency includes forming an antenna with a predetermined fixed characteristic impedance, independent of the resonant frequency.

US Patent:

6756947, Jun 29, 2004

Filed:

Apr 11, 2002

Appl. No.:

10/121391

Inventors:

Stanley S. Toncich - San Diego CA
Allen Tran - San Diego CA

Assignee:

Kyocera Wireless Corp. - San Diego CA

International Classification:

H01Q 1310

US Classification:

343767, 343700 MS, 343787

Abstract:

A family of FE dielectric-tuned antennas and a method for frequency tuning a wireless communications antenna are provided. The method comprises: forming a radiator; forming a dielectric with ferroelectric material proximate to the radiator; applying a voltage to the ferroelectric material; in response to applying the voltage, generating a dielectric constant; and, in response to the dielectric constant, communicating electromagnetic fields at a resonant frequency. Some aspects of the method further comprise: varying the applied voltage; and, modifying the resonant frequency in response to changes in the applied voltage. Modifying the resonant frequency includes forming an antenna with a variable operating frequency responsive to the applied voltage. Alternately stated, forming an antenna with a variable operating frequency includes forming an antenna with a predetermined fixed characteristic impedance, independent of the resonant frequency.

US Patent:

6768463, Jul 27, 2004

Filed:

Oct 11, 2002

Appl. No.:

10/269777

Inventors:

Allen M-T Tran - San Diego CA

Assignee:

Qualcomm Incorporated - San Diego CA

International Classification:

H01Q 124

US Classification:

343700MS, 343702, 343895

Abstract:

A multiple-surface antenna, and a method of receiving signals using an antenna, are disclosed. The multi-surface antenna includes a multi-surface dielectric substrate and a conductive trace formed on at least two surfaces of the dielectric substrate. The conductive trace is formed in a predetermined pattern. The predetermined pattern may be a crossing pattern, or a series of symmetric shapes. The multi-surface dielectric substrate, having the trace formed thereon, may then be integrated entirely within a telephone handset. The method includes providing a multi-surface dielectric substrate, printing on at least two surfaces of the dielectric substrate a conductive trace formed into a periodic pattern, receiving at least one signal at the conductive trace, passing the received signal through at least a portion of the conductive trace, and feeding the received signal from the conductive trace to a coupled receiver. The coupled receiver may be a cellular or cordless telephone handset.