Thomas A Bell

US Patent:

58445293, Dec 1, 1998

Filed:

Apr 7, 1997

Appl. No.:

8/834957

Inventors:

Thomas Edward Bell - Alpharetta GA
David John Kiesling - Atlanta GA
Scott Allen Swanburg - Duluth GA

Assignee:

Electromagnetic Sciences, Inc. - Norcross GA

International Classification:

H01Q 142

US Classification:

343872

Abstract:

An enclosed antenna assembly having a non-rigid, floating connection between an aluminum tray and a radome along the length of the assembly. The non-rigid, floating connection along the length of the antenna assembly provides a seal that is not damaged or degraded as a result of thermal expansion and contraction of the dissimilar materials. The tray and radome are joined along their length by a tongue and groove type connection, which allows free movement along the major axis. A top end cap provides the only rigid connection between the tray and the radome. A bottom end cap is fastened only to the radome. The design of the keyway and the top end cap prevent direct water intrusion. The bottom end cap includes weep holes to allow condensation to escape from the interior of the antenna assembly.

US Patent:

39315207, Jan 6, 1976

Filed:

Nov 8, 1974

Appl. No.:

5/522176

Inventors:

Thomas H. Bell - Boulder CO
Charles H. Johnson - Arvada CO
Robert L. Lane - Golden CO
Bradley E. Martin - Arvada CO
William H. Tyree - Boulder CO

Assignee:

The United States of America as represented by the United States Energy
Research and Development Administration - Washington DC

International Classification:

G01T 100

US Classification:

250328

Abstract:

Apparatus for use in alpha particle counting with such as photomultiplier tubes, comprising a platform and linkage mechanism whereby samples are moved in linear manner toward and away from ends of the photomultiplier tubes.

US Patent:

52785742, Jan 11, 1994

Filed:

Apr 29, 1991

Appl. No.:

7/693938

Inventors:

Kurt A. Zimmerman - Atlanta GA
Thomas E. Bell - Roswell GA

Assignee:

Electromagnetic Sciences, Inc. - Atlanta GA

International Classification:

H01Q 2300
H01Q 336
H05K 700

US Classification:

343778

Abstract:

A low cost, light weight, high performance phase shifter mounting structure which allows high density packaging of phase control modules for phased array antennas. The mounting structure is a bimetallic sandwich design in the shape of an I-beam having a top flange for mating to radiating elements, a bottom flange for mating to a feed network, and a center web for mounting phase control modules. The I-beam is formed from a single piece of laminated stock comprising an outer layer of aluminum and a core layer of titanium forming an anisotropic thermal expansion composite material. The titanium center web matches the coefficient of thermal expansion of the typical ferrite, MIC, or MMIC phase shifter and driver circuits. The aluminum flange material allows easy machining of microwave transitions at each end of the I-beam and matches the expansion of typical radiating element structure and feed networks. The structure provides improved reliability when the subarray is subjected to repeated and widely ranging thermal cycling.

US Patent:

20180088161, Mar 29, 2018

Filed:

Sep 7, 2017

Appl. No.:

15/698606

Inventors:

Thomas Edward Bell - Larkspur CO, US

Assignee:

PIM Solutions LLC - Larkspur CO

International Classification:

G01R 29/08
H01Q 1/42
H01Q 7/00
H01Q 1/24
H01Q 5/30
H01Q 1/38

Abstract:

A PIM probe that includes a PIM antenna carried on a wand sized for positioning by hand. The PIM antenna is tuned by loop size to receive PIM corresponding to uplink reception channels of a site antenna generated by downlink broadcast frequencies F and F of the duplex antenna. The PIM antenna vanes may include conductors printed on a PC boards or wire loops. A PIM probe system includes a signal analyzer that displays a representation of PIM received by the PIM antenna. The PIM probe system further includes an RF filter for passing the PIM frequencies of interest and suppressing the test frequencies transmitted by the site antenna, such as a cellular base station antenna. When the site antenna is broadcasting the test frequencies, the technician places the PIM antenna in various locations to detect the presence of PIM in those locations.