Wladimiro Villarroel

7126539, Oct 24, 2006

Nov 10, 2004

10/985167

Qian Li - Ann Arbor MI, US
Wladimiro Villarroel - Worthington OH, US

AGC Automotive Americas R&D, Inc. - Ypsilanti MI

H01Q 1/38
H01Q 1/32

343700MS, 343713

A microstrip antenna for receiving an RF signal from a satellite includes a radiation element and a ground plane disposed substantially parallel to and spaced from the radiation element. A first dielectric and a second dielectric are sandwiched between the ground plane and the radiation element, in a side-by-side relationship. The first dielectric has a first relative permittivity and the second dielectric has a second relative permittivity different from the first relative permittivity. A feed line electrically connects the antenna to an amplifier. A section of the feed line is disposed between the first and second dielectrics. The antenna produces the effect of tilting a radiation beam from a higher to a lower elevation angle to achieve a higher gain at lower elevation angles.

7126549, Oct 24, 2006

Dec 29, 2004

11/025499

Qian Li - Ann Arbor MI, US
Wladimiro Villarroel - Worthington OH, US

AGC Automotive Americas R&D, Inc. - Yipsilanti MI

H01Q 1/32

343713, 343767, 343770

An antenna for receiving and/or transmitting circularly and/or linearly polarized RF signals includes a radiation element, a ground plane, a dielectric substrate, and a feed line. The radiation element is disposed on a pane of glass. The radiation element defines a slot having a first leg and a second leg forming the shape of a cross for generating the circular and/or linear polarization. The cross-shaped slot includes a center point. The ground plane is disposed substantially parallel to and spaced from the radiation element. The dielectric substrate is sandwiched between the radiation element and the ground plane. The feed line extends within the dielectric substrate and is electromagnetically coupled with the radiation element and the ground plane. The feed line terminates at a distal end short of the center point of the slot. That is, the feed line does not cross the center point.

7224319, May 29, 2007

Jan 7, 2005

11/031660

Sundus Kubba - Saline MI, US
Wladimiro Villarroel - Worthington OH, US

AGC Automotive Americas R&D Inc. - Ypsilanti MI

H01Q 1/32

343713, 343700 MS, 343725

An antenna for receiving and/or transmitting circularly and linearly polarized RF signals includes a circularly polarized radiation element and a linearly polarized radiation element. The radiation elements are disposed co-planar and spaced apart from each other on a pane of glass. The linearly polarized radiation element is fed with a phase-shifted signal line. A ground plane is disposed parallel to the radiation elements to sandwich a dielectric of air. The antenna produces the effect of tilting a radiation beam from a higher to a lower elevation angle to achieve a higher gain at lower elevation angles.

7333059, Feb 19, 2008

Jul 27, 2005

11/190445

Qian Li - Ann Arbor MI, US
Wladimiro Villarroel - Worthington OH, US

AGC Automotive Americas R&D, Inc. - Ypsilanti MI

H01Q 1/38

343700MS, 343713

An antenna for receiving and/or transmitting circularly polarized RF signals includes a patch element, a ground plane, a dielectric, and a feed line. The patch element is disposed on a pane of glass and includes a pair of radiating sides disposed opposite each other and a pair of spacer sides disposed opposite each other. The radiating sides form an angle less than 90 degrees with the spacer sides. A first axis is defined through a center of the radiating sides and a second axis defined though a center of the spacer sides. The ground plane is disposed substantially parallel to and spaced from the patch element. The dielectric substrate is sandwiched between the patch element and the ground plane. The feed line is disposed substantially parallel to and offset from the first axis for providing the antenna with a circular polarization radiation characteristic. The antenna is compact in size and generally conformal to the pane of glass.

7498993, Mar 3, 2009

Oct 18, 2007

11/874709

Kwan-ho Lee - Ann Arbor MI, US
Wladimiro Villarroel - Ypsilanti MI, US
Nuttawit Surittikul - Ann Arbor MI, US
Jesus Gedde - Ann Arbor MI, US

AGC Automotive Americas R&D Inc. - Ypsilanti MI

H01Q 1/32

343713, 343810

An antenna for receiving and/or transmitting radio frequency (RF) signals at multiple cellular frequency bands is disposed on a non-conductive pane. The antenna includes a first antenna element and a second antenna element. The first antenna element has a first radiating element and a second radiating element arranged together in an opposing relationship to form a first bowtie shape. The second antenna element is spaced from the first antenna element and has a third radiating element and a fourth radiating element arranged together in an opposing relationship to form a second bowtie shape with a different dimension than the first bowtie shape. A first trace element connects to and extends between said first and third radiating elements and a second trace element connects to and extends between said second and fourth radiating elements. The antenna establishes an electromagnetic coupling for dual band operation at the multiple cellular frequency bands.

7505002, Mar 17, 2009

Apr 25, 2007

11/739889

Nuttawit Surittikul - Ann Arbor MI, US
Kwan-ho Lee - Ann Arbor MI, US
Wladimiro Villarroel - Worthington OH, US

AGC Automotive Americas R&D, Inc. - Ypsilanti MI

H01Q 1/38

343700MS, 343713, 343858

A patch antenna receives circularly polarized RF signals from a satellite. The antenna includes a radiating element. A plurality of feed lines feed the radiating element at a plurality of feed points. The feed points are spaced apart to generate a circularly polarized radiation beam solely in a higher order mode at a desired frequency. The antenna may include a plurality of parasitic structures. The feed point spacing and/or the parasitic structures tilt the radiating beam away from an axis perpendicular to the radiating element. Thus, the patch antenna provides excellent RF signal reception from satellites at low elevation angles.

7545333, Jun 9, 2009

Mar 16, 2006

11/377752

Qian Li - Ann Arbor MI, US
Wladimiro Villarroel - Worthington OH, US

AGC Automotive Americas R&D - Ypsilanti MI

H01Q 1/32

343713

A patch antenna for receiving and/or transmitting circularly polarized RF signals includes a first radiating layer and a second radiating layer disposed substantially parallel to each other. Each radiating layer defines a pair of perturbation features. A ground plane layer is disposed underneath the radiating layers. The antenna also includes a feed line layer implemented as a coplanar wave guide and disposed between the radiating layers. The feed line layer allows for connection of a single transmission line to the antenna and for electromagnetically connecting the radiating layers to the transmission line. Dielectric layers separate the radiating layers, feed line layer, and ground plane layer.

7586451, Sep 8, 2009

Apr 20, 2007

11/738205

Kwan-ho Lee - Ann Arbor MI, US
Wladimiro Villarroel - Ypsilanti MI, US
Nuttawit Surittikul - Ann Arbor MI, US

AGC Automotive Americas R&D, Inc. - Ypsilanti MI

H01Q 1/32
H01Q 1/38
H01Q 9/38

343713, 343700 MS, 343829

An antenna for radiating an electromagnetic field includes a ground plane, a first dielectric layer disposed on the ground plane, and a second dielectric layer disposed on the first dielectric layer. The antenna includes at least one feeding element embedded in the first dielectric layer and a radiating element extending from the feeding element. The radiating element is embedded within the first dielectric layer adjacent to the second dielectric layer. A beam steering element is embedded in the second dielectric layer and electromagnetically coupled to the radiating element. Embedding the beam steering element in the second dielectric layer and electromagnetically coupling the beam steering element to the radiating element allows the antenna to tilt a radiation beam to overcome a roof obstruction from a vehicle while maintaining acceptable gain, polarization, and directional properties for SDARS applications.