Govind R Kadambi

6342860, Jan 29, 2002

Feb 9, 2001

09/780192

Bradley S. Haussler - Lincoln NE
Govind R. Kadambi - Lincoln NE
Kenneth D. Simmons - Lincoln NE
Jon L. Sullivan - Lincoln NE

Centurion Wireless Technologies - Lincoln NE

H01Q 124

343702, 343872

A Planar Inverted F Antenna (PIFA) is disclosed comprising a radiating element and a ground plane positioned on a bottom cover. A Radome is positioned over the radiating element and the ground plane with the bottom cover and the Radome enclosing the radiating element and the ground plane. The ground plane is positioned below the radiating element and a conductive shorting strip extends between one end of the radiating element and one end of the ground plane. A feed lead extends from one side of the radiating element and has a base portion which protrudes outwardly of the Radome for connection to the center conductor of a RF power feeding cable. The radiating element includes a first horizontally disposed portion, a second horizontally disposed portion, and a substantially vertically disposed portion extending therebetween. The first substantially vertically disposed portion of the radiating element functions as a first capacitive loading plate with the second horizontally disposed portion of the radiating element functioning as a second capacitive loading plate. A dielectric block is positioned between the second horizontally disposed portion of the radiating element for providing dielectric loading to the radiating element.

6417809, Jul 9, 2002

Aug 15, 2001

09/929978

Govind R. Kadambi - Lincoln NE
Blaine Rexel Bateman - Louisville CO
Ted Hebron - Lincoln NE
Gary A. Cumro - Alvo NE
Scott Witt - Lincoln NE

Centurion Wireless Technologies, Inc. - Lincoln NE

H01Q 124

343702, 343700 MS

A compact dual diversity antenna for RF data and wireless communication devices having a printed circuit board is disclosed. First and second PIFAs are mounted on the PCB in a spaced relationship. Each of the first and second PIFAs include radiating elements having ground planes and shorting posts. The ground plane of the second PIFA is disposed in the same plane as the PCB. The ground plane of the first PIFA is orthogonally disposed with respect to the ground plane of the second PIFA. First and second feed posts connect the first and second PIFAs to the PCB through RF feed lines. The first and second feed posts are disposed perpendicularly to one another.

6433747, Aug 13, 2002

Jun 8, 2001

09/877430

Gary A. Cumro - Alvo NE
Sripathi Yarasi - Lincoln NE
Govind R. Kadambi - Lincoln NE
Kenneth D. Simmons - Lincoln NE

Centurion Wireless Technologies, Inc. - Lincoln NE

H01Q 138

343700MS, 343846, 343872

A Planar Inverted F Antenna (PIFA) is disclosed comprising a radiator assembly positioned in the interior of a lower Radome member. An upper Radome member is placed over the radiator assembly with the upper Radome member and the lower Radome member fully enclosing the radiator assembly. The radiator assembly is held to the upper and lower Radome members by means of three dielectric blocks on each member. The radiator assembly comprises: (1) two radiating elements placed on the opposite sides of common ground plane; (2) two separate shorting strips extending between one end of each radiating element and one end of common ground plane; (3) a common feed conductor in the form of a single strip connecting one edge of each radiating element and the common feed conductor which has a disc-shaped portion with an opening formed therein. A ground tab is formed as an extension of the common ground plane. A hollow cylindrical structure formed as an outward extension of the lower Radome member constitutes the embedded (built-in) connector for the PIFA.

6483463, Nov 19, 2002

Mar 27, 2001

09/818410

Govind R. Kadambi - Lincoln NE
Kenneth D. Simmons - Lincoln NE
Sripathi Yarasi - Lincoln NE

Centurion Wireless Technologies, Inc. - Lincoln NE

H01Q 124

343700MS, 343846, 343702

A diversity antenna comprising two planar inverted F antennas (PIFAs) characterized by: two radiating elements with or without the physical separation between them; the spatially separable radiating elements of the two PIFAs with side-by-side or orthogonal placement with respect to each other are combined to form an equivalent single element consisting of the composite assembly of two radiators; a small ground plane of rectangular or L-shape with or without bending at its opposite ends is common to both the radiating elements; the radiating elements are placed above the unbent common ground plane; the radiating elements are placed above the vertical sections of the bent common ground plane; the shorted ends of the spatially separated radiating elements are placed back to back on the said common ground plane; a common shorting post placed along the common boundary line resulted by the merging of the two radiators with a prior side by side mutual placement; a common shorting post placed within the common boundary surface resulted by the merging of the two radiators with a prior mutual orthogonal orientation.

6639560, Oct 28, 2003

Apr 29, 2002

10/135312

Govind R. Kadambi - Lincoln NE
Jon L. Sullivan - Lincoln NE

Centurion Wireless Technologies, Inc. - Lincoln NE

H01Q 124

343700MS, 343702

A Planar Inverted F-Antenna (PIFA) comprising: a radiating element placed above a dielectric carriage with four side walls; a ground plane positioned below the dielectric carriage; a short circuiting element at the front edge of the radiating element; a feed tab at the front edge of the radiating element; vertical planes formed along the right and left edges of the radiating element forming capacitive loading plates; a first reactive loading slot formed in the radiating element between the short circuiting element and the left edge thereof; the open end of the first reactive loading slot being at the front edge of the radiating element; a second reactive loading slot formed in the radiating element between the feed tab and the right edge thereof; the open end of the second reactive loading slot being at the back edge of the radiating element; conductive stubs at the front and back edges of the radiating element for tuning lower and upper resonant frequencies; a conductive strip having a vertical attachment inserted into the dielectric carriage through a slot in the back side wall of dielectric carriage; the conductive strip with its vertical attachment being positioned flush with the outer surface of the back side wall and is connected to the ground plane to serve as a parasitic element to the radiating element for an additional and exclusive resonance.

6642893, Nov 4, 2003

May 9, 2002

10/142542

Ted Hebron - Lincoln NE
Willis R. Hardy - York NE
Govind R. Kadambi - Lincoln NE
Ying Dong Song - Lincoln NE

Centurion Wireless Technologies, Inc. - Lincoln NE

H01Q 124

343702, 343725, 343895, 343867

A multi-band antenna including a retractable antenna and a meander antenna wherein the meander antenna may take several forms. In all of the embodiments, the meander antenna comprises first and second meander radiating elements. In one form of the invention, the closed ends of the loops of the second meander radiating element protrude into the open ends of the loops of the first meander radiating element. In other forms of the invention, active and/or passive elements are positioned between the first and second meander radiating elements. In some forms of the invention, the active or passive elements include stubs which protrude into the open ends of the loops of the first meander radiating element.

6670923, Dec 30, 2003

Jul 24, 2002

10/201859

Govind Rangaswamy Kadambi - Lincoln NE
Vladimir Stoiljkovic - Aylesbury, GB
Shanmuganathan Suganthan - Watford Herts, GB

Centurion Wireless Technologies, Inc. - Lincoln NE

H01Q 138

343700MS, 343702, 343847, 343893

A three-band, two-antenna, assembly includes a planar inverted-F antenna (PIFA) having a radiating/receiving element that is spaced from and extends generally parallel to a ground plane element. The planar radiating/receiving element of an inverted-F antenna (IFA) is located in an open space that exists between the radiating/receiving element of the PIFA and the ground plane element. The radiating/receiving element of the IFA extends either perpendicular to, or parallel to, the radiating/receiving element of the PIFA. The radiating/receiving element of the PIFA includes one or more open slot configurations that operate to provide dual resonant frequencies for the IPFA (AMPS/PCS or GSM/DCS). The radiating/receiving element of the IFA operates in a non-cellular frequency band (ISM or GPS).

6710748, Mar 23, 2004

Jan 14, 2003

10/341862

Sripathi Yarasi - Lincoln NE
Govind R. Kadambi - Lincoln NE
Theodore S. Hebron - Lincoln NE

Centurion Wireless Technologies, Inc. - Lincoln NE

H01Q 124

343702, 343700 MS, 343767

The present invention relates to a non-rectangular shaped PIFA capable of dual ISM band operation using a single power feed. The dual frequency operation of the PIFA is accomplished by using a slot in the radiating element to quasi partition the radiating element. The dual band performance of the PIFA is realized through the integration of either the microstrip or the Co Planar Waveguide (CPW) feed line to the antenna structure.