Xin X Zhang

US Patent:

20220260708, Aug 18, 2022

Filed:

May 24, 2021

Appl. No.:

17/328912

Inventors:

- St. Michael, BB
Zhengzheng Li - Agoura Hills CA, US
Xin Zhang - Agoura Hills CA, US

International Classification:

G01S 13/931

Abstract:

This document describes techniques and systems of a radar system with an angle-finding process for sparse uniform arrays. The described radar system includes a processor and an antenna that can receive electromagnetic energy reflected by objects in the surrounding environment. The antenna includes a one-dimensional (1D) or two-dimensional (2D) sparse array. The processor can determine, using the received electromagnetic energy, a signal subspace associated with the objects that includes an invariance equation. Using an estimated solution to the invariance equation, the processor determines a solution to the invariance equation. The solution to the invariance equation is used to determine angular phases associated with the objects. The processor can then determine, using the angular phases, angles associated with the objects. In this way, the described angle-finding process enables the radar system with a sparse array to efficiently determine angles associated with objects without blind spots.

US Patent:

20220252239, Aug 11, 2022

Filed:

Feb 24, 2022

Appl. No.:

17/652396

Inventors:

- Los Angeles CA, US
Paul Pickard - Acton CA, US
Sana Ashraf - Glendale CA, US
Xin Zhang - Los Angeles CA, US
Richard Wu - Morgan Hill CA, US
Raghuram L.V. Petluri - Cerritos CA, US

International Classification:

F21V 7/04
F21V 5/10
F21V 9/38
F21V 13/14

Abstract:

Lighting system including bowl reflector, visible-light source, central reflector, and optically-transparent body. Bowl reflector has central axis, and rim defining emission aperture, and first visible-light-reflective surface defining portion of cavity in bowl reflector. First visible-light-reflective surface includes parabolic surface. Visible-light source is located in cavity and configured for generating visible-light emissions from semiconductor light-emitting device. Central reflector includes second visible-light-reflective surface, having convex flared funnel shape and having first peak facing toward visible-light source. Optically-transparent body has first base being spaced apart from second base and having side wall extending between first and second bases. Concave flared funnel-shaped surface of second base faces toward convex flared funnel-shaped second visible-light reflective surface of central reflector. First base includes central region having convex paraboloidal-shaped surface and second peak facing toward visible-light source.

US Patent:

20220244370, Aug 4, 2022

Filed:

May 12, 2021

Appl. No.:

17/318621

Inventors:

- St. Michael, BB
Zhengzheng Li - Agoura Hills CA, US
Xin Zhang - Agoura Hills CA, US

International Classification:

G01S 13/44
G01S 13/00

Abstract:

This document describes techniques and systems to enable a radar system to detect angles in bistatic and monostatic scenarios. In some examples, an automotive radar system includes one or more processors. The processors can obtain electromagnetic (EM) energy reflected by objects and generate, based on the reflected EM energy, a two-dimensional (2D) data matrix. The 2D data matrix has a number of rows corresponding to the number of antenna elements in a transmitter array and a number of columns corresponding to the number of antenna elements in a receiver array. Using the 2D data matrix, the processors can determine DoA estimates and DoD estimates in monostatic and bistatic scenarios. By comparing the DoA estimates to the DoD estimates, the processors can determine an angle associated with the objects. In this way, the described techniques and systems can enable angle detection in monostatic and bistatic conditions with improved angular resolution and reduced cost.

US Patent:

20220236370, Jul 28, 2022

Filed:

Apr 21, 2021

Appl. No.:

17/236893

Inventors:

- St. Michael, BB
Xin Zhang - Agoura Hills CA, US
Yu Zhang - Thousand Oaks CA, US

International Classification:

G01S 7/03
G01S 13/42
H01Q 21/08
H01Q 21/06
H01Q 1/32

Abstract:

This document describes techniques and systems of a radar system with paired one-dimensional (1D) and two-dimensional (2D) antenna arrays. Even with fewer antenna elements than a traditional radar system, the paired arrays enable an example radar system to have a comparable angular resolution at a lower cost. For example, the 1D array includes antenna elements positioned in a first direction (e.g., azimuth direction) and spaced by a first distance and a second distance. The 2D array includes at least four other antenna elements positioned in the first direction and a second direction (e.g., elevation direction). The other antenna elements are spaced by a third distance in the second direction and by the sum of the first direction and the second direction in the first direction. A processor can associate, using shared angle estimates, angles in the first direction and the second direction for respective objects.

US Patent:

20210279386, Sep 9, 2021

Filed:

Mar 5, 2020

Appl. No.:

16/810687

Inventors:

- Armonk NY, US
Xin Zhang - Chappaqua NY, US
Mo Yu - White Plains NY, US

International Classification:

G06F 30/27
G06F 30/28

Abstract:

A method of using multiple artificial intelligence models for generating a high fidelity simulation includes generating, by a computing device, multiple artificial intelligence models. Each artificial intelligence model simulating an industry design process. The computing device further fusing the multiple artificial intelligence models to generate a best-fit proposed industry design process. The computing device utilizes a physics constraint model to determine whether the best-fit proposed industry design process is feasible. The best-fit proposed industry design process is displayed in response to determining that the best-fit proposed industry design process is feasible.

US Patent:

20210207787, Jul 8, 2021

Filed:

Oct 11, 2020

Appl. No.:

17/067744

Inventors:

- Los Angeles CA, US
Elizabeth Rodgers - Long Beach CA, US
Paul Pickard - Acton CA, US
Sana Ashraf - Glendale CA, US
Xin Zhang - Los Angeles CA, US
Richard Wu - Morgan Hill CA, US
Raghuram L.V. Petluri - Cerritos CA, US

International Classification:

F21V 7/04
F21V 5/10
F21V 9/38
F21V 13/14

Abstract:

Lighting system including bowl reflector, visible-light source, central reflector, and optically-transparent body. Bowl reflector has central axis, and rim defining emission aperture, and first visible-light-reflective surface defining portion of cavity in bowl reflector. First visible-light-reflective surface includes parabolic surface. Visible-light source is located in cavity and configured for generating visible-light emissions from semiconductor light-emitting device. Central reflector includes second visible-light-reflective surface, having convex flared funnel shape and having first peak facing toward visible-light source. Optically-transparent body has first base being spaced apart from second base and having side wall extending between first and second bases. Concave flared funnel-shaped surface of second base faces toward convex flared funnel-shaped second visible-light reflective surface of central reflector. First base includes central region having convex paraboloidal-shaped surface and second peak facing toward visible-light source.

US Patent:

20210111192, Apr 15, 2021

Filed:

Oct 14, 2019

Appl. No.:

16/600604

Inventors:

- Armonk NY, US
Xin Zhang - Chappaqua NY, US
Todd Edward Takken - Brewster NY, US

International Classification:

H01L 27/12
H01L 21/84
H01L 21/762

Abstract:

The semiconductor structure includes a semiconductor-on-insulator (SOI) substrate. A group III nitride transistor is formed in a trench in the SOI substrate. The activation of the group III nitride transistor is controlled by a silicon-based transistor. The silicon-based transistor that includes a portion of a silicon layer of the SOI substrate. A group III nitride transistor device is adjacent to the silicon-based transistor.

US Patent:

20200357563, Nov 12, 2020

Filed:

May 7, 2019

Appl. No.:

16/405071

Inventors:

- Armonk NY, US
Xin Zhang - Yorktown Heights NY, US

International Classification:

H01F 27/28
H01F 41/04

Abstract:

A broadside coupled coplanar inductor device includes first and second coplanar inductors in which the conductors of the first and second coplanar inductors are broadside coupled. The conductors are located one above the other at a first distance and the return paths are located to the side of the respective first and second conductor signal paths at a second distance. One or both of the dimensions of the first and second first distances is defined so as to maximize a mutual inductance between the conductors. First and second driver circuit apply voltages across each conductor. The input pulse width modulation signals applied to the first and second driver circuits are 180 degrees out of phase.