Sebastian T Kakkanad

US Patent:

6411213, Jun 25, 2002

Filed:

Feb 27, 1998

Appl. No.:

09/031848

Inventors:

Victor Allen Vega - Hercules CA
John H. Rolin - San Jose CA
Richard Fletcher - Cambridge MA
Sebastian Thomas Kakkanad - San Jose CA

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

G08B 13181

US Classification:

3405733, 119720, 340539, 3405721, 34082554, 34082572, 455 41

Abstract:

A radio frequency identification tag system ( ) utilizes a radio frequency identification tag ( ) that includes stored information. The tag includes an antenna element ( ) and a common electrode ( ), the common electrode being coupled to ground ( ). The antenna element electrostatically receives an exciter signal ( ) from a proximately-located exciter ( ). Upon receiving the exciter signal, the tag becomes energized, thereby causing it to generate a read signal ( ) based on the stored information. The antenna element then electrostatically sends the read signal to a proximately-located reader ( ), which detects the stored information. Both energy and data are capacitively coupled by virtue of the unbalanced nature of the network, thus resulting in decreased coupled impedance.

US Patent:

6611199, Aug 26, 2003

Filed:

Apr 16, 1998

Appl. No.:

09/061146

Inventors:

Theodore D. Geiszler - Los Gatos CA
Larry W. Fort - Mesa AZ
George L. Lauro - Bedford Village NY
Russel E. Walker - San Jose CA
Noel H. Eberhardt - Cupertino CA
Victor Allen Vega - Hercules CA
John H. Rolin - San Jose CA
Sebastian Thomas Kakkanad - San Jose CA
Richard R. Fletcher - Cambridge MA

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H04Q 100

US Classification:

340 1051, 3405727, 3405278, 3406935

Abstract:

A portable communication device uses a first electrostatic antenna element and a second electrostatic antenna element and circuitry which is coupled to the first antenna element and to the second antenna element and which derives operating power from an electrostatic field in the vicinity of the first and second antenna elements. The electrostatic field may be provided by an array of exciter elements containing both horizontal and vertical exciter elements so that at some point as a communication device is moved across the exciter antenna array, the device will have sufficient power coupled to it to power up and become operational.

US Patent:

62189425, Apr 17, 2001

Filed:

Sep 11, 1998

Appl. No.:

9/151904

Inventors:

Victor Allen Vega - Hercules CA
Sebastian Thomas Kakkanad - San Jose CA

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

G08B 1314

US Classification:

3405721

Abstract:

A radio frequency identification tag exciter/reader (10) is arranged for operation in association with an article transport device (100). The radio frequency identification tag exciter/reader (10) includes a canopy assembly (12) into which an exciter antenna (22) and a reader antenna (24) are positioned. A base station (26) is further provided and is coupled to the exciter antenna (22) and the reader antenna (24). The base station (26) provides an excitation signal (36) and receives a read signal (38). The base station further communicates with a system element (34). A hand held radio frequency identification tag exciter/reader (900) includes a hand holdable housing (912) including an exciter antenna (922) and a reader antenna (924). The housing is coupled to a portable base station (926). The base station (926) provides an excitation signal (936) and receives a read signal (938).

US Patent:

62294423, May 8, 2001

Filed:

Mar 14, 2000

Appl. No.:

9/525718

Inventors:

John Howard Rolin - Morgan Hill CA
Sebastian T. Kakkanad - San Jose CA
James G. Quaderer - Sunnyvale CA

Assignee:

Motorola, Inc, - Schaumburg IL

International Classification:

G08B 1314

US Classification:

3405721

Abstract:

A radio frequency identification (RFID) device (12) having displacement current control. The RFID device (12) comprises a voltage source (30), and exciter electrode, electronic circuitry, a displacement current control surface (74) and a dielectric. The voltage source has a current return node. The exciter electrode is coupled to the voltage source. The displacement current control surface (74) is placed between the exciter electrode and the electronic circuitry. The dielectric is positioned between the displacement current control surface and the electronic circuitry, wherein the displacement current control surface is electrically terminated to the current return node of the voltage source.