Wei W Zheng

US Patent:

6784521, Aug 31, 2004

Filed:

Feb 26, 2002

Appl. No.:

10/082717

Inventors:

Radha Setty - Staten Island NY
Wei Ping Zheng - Brooklyn NY
Igor Lumelskiy - Brooklyn NY

Assignee:

Scientific Components - Brooklyn NY

International Classification:

H01L 3900

US Classification:

257662, 257663, 257664, 333109, 333112, 333118, 333119, 333115, 333127

Abstract:

A directional coupler that has a small package size and repeatable electrical characteristics. The directional coupler includes a low temperature co-fired ceramic (LTCC) substrate with several layers. Electrical components such as resistors and capacitors are integrated within the LTCC substrate. A transformer is attached to the upper surface of the LTCC substrate and is electrically connected to the resistors and capacitors. The LTCC substrate has electrically conductive vias extending therethrough. The vias are used to make electrical connections between the layers of the LTCC substrate.

US Patent:

6963255, Nov 8, 2005

Filed:

Jan 18, 2002

Appl. No.:

10/050700

Inventors:

Wei Ping Zheng - Brooklyn NY, US
Igor Lumelskiy - Brooklyn NY, US
Radha Setty - Staten Island NY, US

International Classification:

H03H007/38

US Classification:

333131, 333109, 333112, 333115, 333118, 333119, 333127

Abstract:

A power splitter that has a small package size and repeatable electrical characteristics. The power splitter includes a low temperature co-fired ceramic (LTCC) substrate with several layers. Electrical components such as resistors and capacitors are integrated within the LTCC substrate. A transformer is attached to the upper surface of the LTCC substrate and is electrically connected to the resistors and capacitors. The transformer provides impedance matching and dividing functions. The LTCC substrate has electrically conductive vias extending therethrough. The vias are used to connect the power splitter to an external printed circuit board. The vias are also used to make electrical connections between the layers of the LTCC substrate.

US Patent:

20060033592, Feb 16, 2006

Filed:

Oct 19, 2005

Appl. No.:

11/254011

Inventors:

Wei Zheng - Brooklyn NY, US
Igor Lumelskiy - Brooklyn NY, US
Radha Setty - Brooklyn NY, US

International Classification:

H03H 7/38

US Classification:

333131000

Abstract:

A power splitter that has a small package size and repeatable electrical characteristics. The power splitter includes a low temperature co-fired ceramic (LTTC) substrate with several layers. Electrical components such as resistors and capacitors are integrated within the LTTC substrate. A transformer is attached to the upper surface of the LTCC substrate and is electrically connected to the resistors and capacitors. The transformer provides impedance matching and dividing functions. The LTCC substrate has electrically conductive vias extending therethrough. The vias are used to connect the power splitter to an external printed circuit board. The vias are also used to make electrical connections between the layers of the LTCC substrate.

US Patent:

20130099529, Apr 25, 2013

Filed:

Oct 10, 2012

Appl. No.:

13/648763

Inventors:

Wei Zheng - Pompton Lakes NJ, US
Zheng Yan Guo - New York NY, US

International Classification:

A47C 7/74

US Classification:

29718014

Abstract:

A cooling pad includes a bottom section, a top section, and a middle section which together form a contoured surface to support a person's back. The contoured surface includes concave and convex sections, providing ventilated pockets which allow air to flow to a person's back. Inside the middle section there are intake holes, located on either side of the cooling pad, and exhaust holes, positioned atop and below the middle section. The intake holes allow air to be brought in from outside, while the exhaust holes direct air to cool a person's back. Fan and power systems are stored inside the middle section. The fan blows air through the exhaust holes. The system as a whole is designed to utilize negative pressure to bring fresh air in from the intakes, replacing the air the fan pushes through the exhaust holes. The resulting airflow prevents back sweat from occurring.

US Patent:

61408875, Oct 31, 2000

Filed:

Jan 22, 1999

Appl. No.:

9/235203

Inventors:

Wei Ping Zheng - Brooklyn NY

Assignee:

Scientific Components - Brooklyn NY

International Classification:

H03H 738

US Classification:

333112

Abstract:

A wide band directional coupler of the type using ferrite cores and discrete winding in which a special winding method and its position on the core improves coupling flatness, directivity, as well as input and output VSWR.