Cheng P Lee

US Patent:

20110175789, Jul 21, 2011

Filed:

Nov 9, 2010

Appl. No.:

12/942932

Inventors:

Cheng Jung Lee - Santa Clara CA, US
Nhan Duc Nguyen - Oceanside CA, US
Ajay Gummalla - Sunnyvale CA, US

Assignee:

RAYSPAN CORPORATION - San Diego CA

International Classification:

H01Q 21/30
H04B 3/04
H01Q 1/36
H01Q 1/50

US Classification:

343853, 333 171, 343700 MS, 343850, 343876

Abstract:

Architectures and implementations of a transceiver system for wireless communications are presented, the system including one or more antennas supporting a single frequency band or multiple frequency bands, a transmit circuit, a receive circuit, and an isolation circuit that is coupled to the one or more antennas and the transmit and receive circuits and provides adequate isolation between the transmit circuit and the receive circuit.

US Patent:

20110210787, Sep 1, 2011

Filed:

Feb 3, 2011

Appl. No.:

13/020204

Inventors:

Woo Yong Lee - San Diego CA, US
Ajay Gummalla - Sunnyvale CA, US
Maha Achour - Encinitas CA, US
Cheng Jung Lee - Santa Clara CA, US

International Classification:

H03F 3/68
H03H 7/38

US Classification:

330126, 333129

Abstract:

A system includes a plurality of band pass filters to pass signals in separated frequency bands to or from an antenna. A matching network provides characteristic impedances. The system is designed such that the configuration of the matching network and BPFs provides high impedance to the band pass filters for those routing paths other than the band pass path as these routing paths do not transmit or receive the signals at this particular pass band. The system is further designed such that the configuration of the matching network and BPFs provides minimal insertion loss for the band pass path of for transmission and receipt of signals at this particular pass band, where each routing path has a corresponding pass band. The matching network is for coupling to an amplifier, when frequency separation is needed at the output of the amplifier to the BPFs. In one embodiment an impedance network tunes the impedance by using varying length transmission lines.

US Patent:

20110267244, Nov 3, 2011

Filed:

Mar 2, 2011

Appl. No.:

13/038450

Inventors:

Sunil Kumar Rajgopal - San Diego CA, US
Ajay Gummalla - Sunnyvale CA, US
Cheng Jung Lee - Santa Clara CA, US
Vaneet Pathak - San Diego CA, US

International Classification:

H01Q 1/36
H01P 11/00
H01Q 1/50

US Classification:

343720, 343700 MS, 343850, 29601

Abstract:

This application relates to a multi-functional Composite Right and Left Handed CRLH antenna device. A conductive element of a wireless device is incorporated into the antenna structure for reuse. In one embodiment a peripheral feature, such as a key dome, is incorporated into the antenna device. In this way, the antenna structure includes portions which are multi-functional.

US Patent:

20130114470, May 9, 2013

Filed:

May 16, 2011

Appl. No.:

13/698620

Inventors:

Woo Yong Lee - San Diego CA, US
Cheng Jung Lee - Santa Clara CA, US

International Classification:

H04B 1/48

US Classification:

370278

Abstract:

A system includes a transmit filter () in a transmit path to couple to an antenna () and pass signals in a transmit band. A receive filter () is disposed in a receive path to couple to the antenna and to the transmit filter to pass signals in a receive band different from the transmit band. An enhanced frequency variable impedance () is used to provide isolation between signals in the transmit and receive bands on the receive path. A phase and magnitude controlled feedback path can also be used to cancel transmit signals in the receive path.

US Patent:

20140022133, Jan 23, 2014

Filed:

Jul 1, 2013

Appl. No.:

13/932998

Inventors:

- Schaffhausen, CH
Maha Achour - Encinitas CA, US
Cheng Jung Lee - Santa Clara CA, US
Vaneet Pathak - Palo Alto CA, US
Gregory Poilasne - El Cajon CA, US

Assignee:

Tyco Electronics Services GMBH - Schaffhausen

International Classification:

H01Q 15/08

US Classification:

343745, 343911 R

Abstract:

Techniques and apparatus based on metamaterial structures provided for antenna and transmission line devices, including single-layer metallization and via-less metamaterial structures.

US Patent:

62648098, Jul 24, 2001

Filed:

Oct 30, 1998

Appl. No.:

9/183547

Inventors:

Cheng H. Lee - San Diego CA

Assignee:

PTI Advanced Filtration, Inc. - Newbury Park CA

International Classification:

C25B 1300

US Classification:

204282

Abstract:

One electrode is provided in association with the object to be coated, the other electrode. A pre-stretched ion-exchange membrane in a thin tubular form is sandwiched inbetween two nonconductive water permeable screen tubular housings. The assembly contains a supply line that provides a water way for the electrolyte to flow from the top of the device into a lower cap, then to the lower cap reservoir that allows stabilization and disbursement of electrolyte through the rifled housing Inertia developed through this defined pattern creates a swirling action that scrubs the impurities away from the anode, and to the top of the device to be carried out top. The location of the supply line is just inside the inner screen inserted through both the upper housing and lower cap. The tubular electrode is provided to the inside of membrane housing completing the inner portion of the waterway return chamber.

US Patent:

20230045521, Feb 9, 2023

Filed:

May 23, 2022

Appl. No.:

17/751199

Inventors:

- Palo Alto CA, US
Ray Tanaka - Palo Alto CA, US
Victor Chau - Palo Alto CA, US
Charles Feng - Palo Alto CA, US
Cheng Han Lee - Palo Alto CA, US
Lubab Al-Khawaja - Palo Alto CA, US

International Classification:

G06Q 20/32

Abstract:

Systems and methods for processing transactions using a digital payment platform.

US Patent:

20200193405, Jun 18, 2020

Filed:

Dec 12, 2019

Appl. No.:

16/712581

Inventors:

- Palo Alto CA, US
Ray Tanaka - Palo Alto CA, US
Victor Chau - Palo Alto CA, US
Charles Feng - Palo Alto CA, US
Cheng Han Lee - Palo Alto CA, US
Lubab Al-Khawaja - Palo Alto CA, US

International Classification:

G06Q 20/20
G06Q 20/40
G06Q 20/02

Abstract:

Systems and methods for processing transactions using a digital payment platform.