James J Maxwell

US Patent:

7333771, Feb 19, 2008

Filed:

May 12, 2005

Appl. No.:

11/127668

Inventors:

James William Maxwell - Atlanta GA, US

Assignee:

Andrew Corporation - Westchester IL

International Classification:

H04B 7/14
H04B 7/15
H04B 1/38
H05K 7/02
H05K 7/10

US Classification:

455 15, 455402, 455 111, 455 903, 361807, 361808

Abstract:

A relatively low cost, easy to install and aesthetically pleasing cellular signal enhancer, also known as a wireless repeater, suitable for use in a home or business. The device includes a removable mounting pedestal that can be plugged into both an upper and a lower receptacle on a signal enhancer unit. This allows the signal enhancer unit to be installed with the same upright orientation when installed on an upper or a lower support surface, for example the bottom or top casing of a window frame. The mounting pedestal includes a power plug so that the mounting pedestal is removable and can be plugged into the upper or lower receptacles on the signal enhancer unit. Alternatively, the unit may include an orientation detector and an invertible display that inverts the symbols shown on the display in response to the detected orientation of the signal enhancer unit.

US Patent:

7339549, Mar 4, 2008

Filed:

Jul 13, 2006

Appl. No.:

11/457372

Inventors:

James William Maxwell - Atlanta GA, US

Assignee:

Andrew Corporation - Norcross GA

International Classification:

H01Q 1/12

US Classification:

343892, 343878, 343890, 2482184

Abstract:

A universal mounting assembly that can be attached to both a cylindrical surface and a planar surface is provided according to embodiments of the present invention. The universal mounting assembly includes a top plate, a bottom plate, and a spacer. Both the top plate and the bottom plate have a pair of parallel edge portions and at least one curved edge portion that is disposed between the two parallel edge portions. The curved edge portion on the top and bottom plate contains at least one mounting tab for attaching the universal mounting assembly to a cylindrical support structure. The universal mounting assembly also includes planar mounting brackets located at each intersection of the parallel edge portions and the curved edge portion for mounting to a planar support structure. The top plate and the bottom plate are rigidly affixed to the spacer, which may be annular shaped and used to house electronic components, such as a lightning protection circuit. Other embodiments are also claimed and described.

US Patent:

20040166802, Aug 26, 2004

Filed:

Feb 26, 2003

Appl. No.:

10/375879

Inventors:

David McKay - Duluth GA, US
Donald Runyon - Duluth GA, US
Donald McNeill - Sugar Hill GA, US
Stephen Thompson - Norcross GA, US
James Maxwell - Atlanta GA, US

Assignee:

EMS Technologies, Inc. - Norcross GA

International Classification:

H04B003/36
H04B007/14

US Classification:

455/015000, 455/007000

Abstract:

A low-cost user portable signal enhancer unit for extending service coverage of wireless communications to a user in a desired area of limited coverage. The enhancement supports an increase of signal power levels to allow wireless communication usage in a location, such as a small office or home office environment where the original cellular signals are weak or unreliable. A base station signal is enhanced by a bi-directional amplifier device (BDA), which receives a base station signal, amplifies the signal power and retransmits the amplified signal in a first signal path to a user in close proximity. The bi-directional amplifier also receives a user signal, amplifies the signal power and retransmits the amplified signal to the base station in a second separate signal path. Dual polarized antennas can receive and transmit the respective signals at opposite polarizations to increase isolation of the signals.

US Patent:

20060205343, Sep 14, 2006

Filed:

Mar 11, 2006

Appl. No.:

11/373061

Inventors:

Donald Runyon - Duluth GA, US
Stephen Thompson - Norcross GA, US
James Maxwell - Atlanta GA, US
David McKay - Duluth GA, US

International Classification:

H04B 7/15

US Classification:

455011100

Abstract:

A wireless repeater with features that improve the server-donor antenna isolation including multi-purpose server and donor mounting plates that each carry an antenna feed circuit board and associated antenna elements mounted in a back-to-back arrangement with the duplex repeater electronics board sandwiched between the server and donor mounting plates. To improve the server-donor antenna isolation, one or both mounting plates may include corner, side tabs, which may be asymmetric, and raised walls around one or both mounting plates. In addition, the radomes covering the donor antenna and/or the server antennas may carry one or more parasitic conductors, such as a two parasitic strips arranged in parallel lines or for parasitic strips arranged in a square configuration.

US Patent:

20070232228, Oct 4, 2007

Filed:

Apr 4, 2006

Appl. No.:

11/397304

Inventors:

David McKay - Duluth GA, US
Donald Runyon - Duluth GA, US
Stephen Thompson - Norcross GA, US
James Maxwell - Atlanta GA, US

International Classification:

H04B 7/15

US Classification:

455011100

Abstract:

A wireless repeater that includes a universal server base unit and modular donor antenna options. The universal server base unit includes a base unit bidirectional amplifier, a server antenna, and a housing that accepts an internal donor antenna board or an internal adapter module connected to a cable port for receiving a coaxial cable connected to an external donor antenna. This allows the same universal server base unit to work with a variety of internal and external donor antenna options. In particular, the external donor antennas include outdoor swivel-mounted options including a helical circular polarization antenna, a dual polarization panel antenna, and a vertical polarization panel antenna. The donor antenna may include an optional donor bidirectional antenna located in or near the donor antenna and powered via the cable from the server base unit.

US Patent:

20130141288, Jun 6, 2013

Filed:

Dec 6, 2012

Appl. No.:

13/707307

Inventors:

James W. Maxwell - Alpharetta GA, US
Jeremy Deryl Standridge - Commerce GA, US

Assignee:

VIASAT, INC. - Carlsbad CA

International Classification:

H01Q 1/02

US Classification:

343705

Abstract:

In an example embodiment, an airborne radio frequency (RF) antenna device can comprise: a radiating portion; a waveguide portion connected to the radiating portion; a desiccant airflow channel; and an internal air volume located within the RF antenna device and associated with the desiccant airflow channel. The desiccant airflow channel can be integral with the RF antenna device. The internal air volume can be vented to the environment outside of the RF antenna device through the desiccant airflow channel.

US Patent:

20130141300, Jun 6, 2013

Filed:

Dec 6, 2012

Appl. No.:

13/707160

Inventors:

Dominic Quang Nguyen - Duluth GA, US
James W. Maxwell - Alpharetta GA, US

Assignee:

VIASAT, INC. - Carlsbad CA

International Classification:

H01P 5/12
H01P 11/00
H01Q 13/02

US Classification:

343786, 333137, 295921

Abstract:

In an example embodiment, an azimuth combiner comprises: a septum layer comprising a plurality of septum dividers; first and second housing layers attached to first and second sides of the septum layer; a linear array of ports on a first end of the combiner; wherein the first and second housing layers each comprise waveguide H-plane T-junctions; wherein the waveguide T-junctions can be configured to perform power dividing/combining; and wherein the septum layer evenly bisects each port of the linear array of ports. A stack of such azimuth combiners can form a two dimensional planar array of ports to which can be added a horn aperture layer, and a grid layer, to form a dual-polarized, dual-BFN, dual-band antenna array.

US Patent:

62329286, May 15, 2001

Filed:

Feb 3, 2000

Appl. No.:

9/497425

Inventors:

Kurt A. Zimmerman - Atlanta GA
James W. Maxwell - Norcross GA

Assignee:

EMS Technologies, Inc. - Norcross GA

International Classification:

H01Q 302
H01Q 112

US Classification:

343882

Abstract:

Antenna mounting bracket assembly having a spine, an upper bracket, a lower bracket and a cam bracket for mounting an antenna on a support structure, such as a vertical pole and for providing adjustment of the antenna's downwards tilt position. The spine provides for the proper spacing and rotational alignment between the upper and lower ends of the accompanying antenna. The cam bracket can allow either analog or digital adjustment of the downwards tilt position of the antenna. The assembly can allow for the installation of the antenna upon the support structure by a single technician.