Kenneth Abraham Tang

US Patent:

6556836, Apr 29, 2003

Filed:

May 2, 2001

Appl. No.:

09/847629

Inventors:

John Lovberg - San Diego CA
Kenneth Y. Tang - Alpine CA
Randall Olsen - Carlsbad CA
Vladimir Kolinko - San Diego CA

Assignee:

Trex Enterprises Corporation - San Diego CA

International Classification:

H04B 1500

US Classification:

455505, 455562, 455 675, 455445, 455 10, 455 25, 455 73, 343894

Abstract:

A point-to-point, wireless, millimeter wave communications link providing data transmission rates of over 1 billion bits per second (more than 1 Gbps) at ranges of several miles during normal weather conditions. In a preferred embodiment a communication link operates within the 92 to 95 GHz portion of the millimeter spectrum. A first transceiver transmits at a first bandwidth and receives at a second bandwidth both within the above spectral range. A second transceiver transmits at the second bandwidth and receives at the first bandwidth. The transceivers are equipped with antennas providing divergence of less than 10 steradians so that an almost unlimited number of transceivers can use the same spectrum. In a preferred embodiment the first and second spectral ranges are 92. 3-93. 2 GHz and 94. 1-95. 0 GHz.

US Patent:

6587699, Jul 1, 2003

Filed:

Jan 11, 2002

Appl. No.:

10/044556

Inventors:

Randall B. Olsen - Carlsbad CA
Louis Slaughter - Weston MA
John Lovberg - San Diego CA
Kenneth Y. Tang - Alpine CA
Vladimir Kolinko - San Diego CA
Paul Johnson - Kihei HI

Assignee:

Trex Enterprises Corporation - San Diego CA

International Classification:

H04B 138

US Classification:

455562, 455424, 455 25, 455 671, 455 675, 343894, 343874, 343754, 343720, 342359

Abstract:

Equipment and methods for aligning the antennas of two transceivers of a point-to-point wireless millimeter wave communications link and keeping them aligned. Each of two communicating antennas is equipped with a telescopic camera connected to a processor programmed to recognize landscape images. The processors are programmed to remember the pattern of the landscape as it appears when the antennas are aligned. Each of the cameras then view the landscape periodically or continuously and if the landscape in view changes by more than a predetermined amount a signal is provided to indicate a misalignment. An operator can then take corrective action or alternatively the antenna system can be configured for remote or automatic realignment based of feedback from the camera. In a preferred embodiment, the antennas are initially aligned by substituting a narrow band oscillator power source for the signal transmitting electronics associated with a first antenna and a power detector is substituted for the signal receiving electronics of associated with a second antenna.

US Patent:

7131446, Nov 7, 2006

Filed:

Mar 25, 2004

Appl. No.:

10/810778

Inventors:

Kenneth Y. Tang - Alpine CA, US
Betty W. Tang - Alpine CA, US

International Classification:

A61B 19/00

US Classification:

128898, 607 88, 606 9

Abstract:

A light-triggered tattoo process. A strong absorber of light energy and tattoo material are sandwiched under pressure between a skin region and a transparent window. Short pulses of light, at frequencies strongly absorbed by the strong absorber, illuminates the strong absorber through the window creating micro-explosions in the strong absorber that drive particles of the tattoo material into the skin region producing a tattoo.

US Patent:

20020164946, Nov 7, 2002

Filed:

Dec 1, 2001

Appl. No.:

10/000182

Inventors:

Randell Olsen - Carlsbad CA, US
Louis Slaughter - Weston MA, US
Chester Phillips - Germantown MD, US
Paul Johnson - Kihei HI, US
John Lovberg - San Diego CA, US
Kenneth Tang - Alpine CA, US
George Houghton - San Diego CA, US
Vladimir Kolinko - San Diego CA, US

International Classification:

H04H001/00

US Classification:

455/003050, 455/562000, 455/561000

Abstract:

A communication network including a point-to-point, wireless, millimeter wave trunk line communications link at high data rates in excess of 1 Gbps. This link is combined with a local network which includes at least one multi-beam antenna to provide high speed digital data communication for multiple users. In preferred embodiments the network also includes Ethernet service to additional users. In these preferred embodiments many or most of these multiple users are temporary users such as participants at a conference. In a preferred embodiment, a trunk line communication link operates within the 92 to 95 GHz portion of the millimeter spectrum. A first transceiver transmits at a first bandwidth and receives at a second bandwidth both within the above spectral range. A second transceiver transmits at the second bandwidth and receives at the first bandwidth. The transceivers are equipped with antennas providing beam divergence small enough to ensure efficient spatial and directional partitioning of the data channels so that an almost unlimited number of transceivers will be able to simultaneously use the same spectrum.

US Patent:

20020164959, Nov 7, 2002

Filed:

Jun 2, 2001

Appl. No.:

09/872621

Inventors:

Randall Olsen - Carlsbad CA, US
John Lovberg - San Diego CA, US
Kenneth Tang - Alpine CA, US
Vladimir Kolinko - San Diego CA, US
George Houghton - San Diego CA, US

International Classification:

H04B001/38

US Classification:

455/073000, 455/067100, 455/505000, 455/067600

Abstract:

A point-to-point, wireless, millimeter wave communications link at ranges of several miles during normal weather conditions. In a preferred embodiment a communication link operates within the 92 to 95 GHz portion of the millimeter spectrum and provides data transmission rates in excess of 155 Mbps. A first transceiver transmits at a first bandwidth and receives at a second bandwidth both within the above spectral range. A second transceiver transmits at the second bandwidth and receives at the first bandwidth. The transceivers are equipped with antennas providing beam divergence small enough to ensure efficient spatial and directional partitioning of the data channels so that an almost unlimited number of transceivers will be able to simultaneously use the same spectrum. Antennas and rigid support towers are described to maintain beam directional stability to less than one-half the half-power beam width. In a preferred embodiment the first and second spectral ranges are 92.3-93.2 GHz and 94.1-95.0 GHz and the half power beam width is about 0.36 degrees or less.

US Patent:

20020165002, Nov 7, 2002

Filed:

Jan 31, 2002

Appl. No.:

10/061872

Inventors:

Vladimir Kolinko - San Diego CA, US
Richard Chedester - Whately MA, US
Randall Olsen - Carlsbad CA, US
John Lovberg - San Diego CA, US
Kenneth Tang - Alpine CA, US

International Classification:

H04B007/00

US Classification:

455/500000, 455/073000

Abstract:

High performance transceivers for wireless, millimeter wave communications links at frequencies in excess of 70 GHz. A preferred embodiment built and tested by Applicants is described. This embodiment provides a communication link of more than eight miles which operates within the 71 to 76 GHz portion of the millimeter spectrum and provides data transmission rates of 1.25 Gbps with bit error rates of less than 10. A first transceiver transmits at a first bandwidth and receives at a second bandwidth both within the above spectral range. A second transceiver transmits at the second bandwidth and receives at the first bandwidth. The transceivers are equipped with antennas providing beam divergence small enough to ensure efficient spatial and directional partitioning of the data channels so that an almost unlimited number of transceivers will be able to simultaneously use the same spectrum. In a preferred embodiment the first and second spectral ranges are 71.8+/-0.63 GHz and 73.8+/-0.63 GHz and the half power beam width is about 0.2 degrees or less. Preferably, a backup transceiver set is provided which would take over the link in the event of very bad weather conditions.

US Patent:

20030022694, Jan 30, 2003

Filed:

Sep 28, 2001

Appl. No.:

09/965875

Inventors:

Randall Olsen - Carlsbad CA, US
Chester Phillips - Germantown MD, US
John Lovberg - San Diego CA, US
Kenneth Tang - Alpine CA, US
Vladimir Kolinko - San Diego CA, US

International Classification:

H04B007/00

US Classification:

455/562000, 455/272000

Abstract:

A wireless cellular communication system in which cellular base stations utilize multi-beam antenna to communicate with a large number of users. Each of the base station beams is a narrow beam of less than 10 degrees permitting reuse of available spectrum many times. A preferred antenna is described which broadcasts about 12 simultaneous beams, each about 5 degree, the 12 beams together covering a fan arc of about 60 degrees with the beams overlapping somewhat but interference is avoided by having adjacent beams broadcast at different frequencies within an authorized broadcast bandwidth. Six antennae mounted in a hexagonal manner thus cover a 360-degree azimuthal range. Preferably, users of the system communicate with the base station using a single narrow beam antenna directed at the base station. Since all beam are narrow beams many base stations may be located in the same cellular region permitting more than an order of magnitude increase in the utilization of available bandwidth and permitting a huge increase in bandwidth per customer. In a preferred embodiment the base stations communicate with a central office via a narrow-beam millimeter wave trunk line. The transceivers are equipped with antennas providing beam divergence small enough to ensure efficient spatial and directional partitioning of the data channels so that an almost unlimited number of point-to-point transceivers will be able to simultaneously use the same millimeter wave spectrum.

US Patent:

20070013513, Jan 18, 2007

Filed:

Mar 28, 2006

Appl. No.:

11/392376

Inventors:

Kenneth Tang - Alpine CA, US
Lance Brees - San Diego CA, US
Richard Chedester - Whately MA, US

International Classification:

G08B 13/00
H04N 7/18

US Classification:

340541000, 348143000

Abstract:

A surveillance system utilizing existing street lighting equipment. In a preferred embodiment, surveillance units include a small camera and a wireless transceiver and a connector that allows the surveillance units to plug into an existing outdoor light in the place of the outdoor lights' photo cells. In this preferred embodiment communication between the lights and the cellular station is at frequencies of about 2.4 GHz and uses the 802.11b protocol that permits transmission of data at up to 11 million bits per second or the 802.11g protocol that permits transmission of data at up to 54 million bits per second. The cellular stations then communicates with the central monitoring station at a frequency range of 71-76 GHz and 81 to 86 GHz that permits transmission of data at about 1.0 billion bits per second. In an example system, with 1,000 surveillance cameras (each camera unit plugged into the photocell receptacle of a street light), 100 camera units communicate with each of 10 cellular stations and the 10 cellular stations communicate with a single central monitoring station.