Chen Zhang

US Patent:

20200220219, Jul 9, 2020

Filed:

Mar 18, 2020

Appl. No.:

16/822343

Inventors:

- Road Town, VG
- Oakland CA, US
Chen Zhang - Los Angeles CA, US

International Classification:

H01M 10/0567
H01M 10/0525
H01M 10/0565
H01M 10/42

Abstract:

The invention provides a composite separator and an electrochemical device such as a battery with the composite separator. The composite separator includes a membrane comprising at least one polymer and at least one metal organic framework (MOF) material defining a plurality of pore channels, where the at least one MOF material is activated at a temperature for a period of time. The at least one MOF material is a class of crystalline porous scaffolds constructed from metal clusters with organic ligands and comprises unsaturated metal centers, open metal sites and/or structural defects that are able to complex with anions in electrolyte. The membrane is formed by electrospinning of a mixture of the at least one MOF material with a polymer solution comprising the at least one polymer dissolved in at least one solvent, such that the membrane has a porous structure with tunable pore sizes and bead-threaded fibrous morphology.

US Patent:

20180123770, May 3, 2018

Filed:

Dec 7, 2017

Appl. No.:

15/834739

Inventors:

- Redmond WA, US
Chen Zhang - Sammamish WA, US

International Classification:

H04L 5/14
H04B 7/04
H04B 1/00

Abstract:

The described technology provides front-end antenna architecture for wireless communication that manages multiple frequency sub-bands in a manner that results is a low insertion loss rate. Further, the components of the architecture are smaller than typical wireless communication antenna architectures, and therefore the described architecture can be accommodated in a smaller area than typical architectures without a decrease in efficiency. A matching circuit is communicatively connected to each frequency sub-band's respective signal path. When two or more sub-bands are requested for high-speed wireless communication, the matching circuits match the impedance of each sub-band with one-another. Matching the impedance allows two or more sub-bands to be used to wirelessly communicate while maintaining high efficiency. The matching circuits are disabled when only one sub-band is needed for wireless communication.

US Patent:

20170207534, Jul 20, 2017

Filed:

Jan 19, 2016

Appl. No.:

15/001008

Inventors:

- Redmond WA, US
Chen Zhang - Sammamish WA, US

International Classification:

H01Q 5/335

Abstract:

The described technology provides an antenna interface for wireless communication that allows the use of a single transmission line trace between at least one antenna and a transceiver of a wireless communications device. The components of the antenna interface include a first set of filters, a set of low noise amplifiers (LNAs) and a second set of filters. The antenna interface, which is communicatively coupled to the single transmission line trace, avoids the use of a coaxial cable and reduces issues related to the use of multiple transmission line traces.

US Patent:

20170093552, Mar 30, 2017

Filed:

Sep 30, 2015

Appl. No.:

14/871219

Inventors:

- Redmond WA, US
Chen Zhang - Sammamish WA, US

International Classification:

H04L 5/14
H04B 7/04

Abstract:

The described technology provides front-end antenna architecture for wireless communication that manages multiple frequency sub-bands in a manner that results is a low insertion loss rate. Further, the components of the architecture are smaller than typical wireless communication antenna architectures, and therefore the described architecture can be accommodated in a smaller area than typical architectures without a decrease in efficiency. A matching circuit is communicatively connected to each frequency sub-band's respective signal path. When two or more sub-bands are requested for high-speed wireless communication, the matching circuits match the impedance of each sub-band with one-another. Matching the impedance allows two or more sub-bands to be used to wirelessly communicate while maintaining high efficiency. The matching circuits are disabled when only one sub-band is needed for wireless communication.