Jeffrey Allan Godard
Engineers at Bowles Ave, Littleton, CO
License number
Colorado 53903
Issued Date
Jan 17, 1997
Renew Date
Jan 17, 1997
Type
Engineer Intern
Address
Address
10650 W Bowles Ave, Littleton, CO 80127
Professional information
Radio Frequency Connector For Reducing Passive Inter-Modulation Effects
US Patent:
6414636, Jul 2, 2002
Filed:
Aug 26, 1999
Appl. No.:
09/383342
Inventors:
Jeffrey A. Godard - Littleton CO
Michael W. McRae - Citrus Heights CA
Steven C. Olson - Broomfield CO
Michael W. McRae - Citrus Heights CA
Steven C. Olson - Broomfield CO
Assignee:
Ball Aerospace Technologies Corp. - Boulder CO
International Classification:
H01Q 1308
US Classification:
343700MS, 333 24, 333260, 333 12
Abstract:
A radio frequency connector for coupling radio frequency energy into or out of an antenna apparatus includes a ground portion that is both capacitively and conductively coupled to a ground structure within the antenna apparatus. The connector is designed so that radio frequency (RF) signals within the operative frequency range of the antenna apparatus flow predominantly through the capacitive ground connection of the connector, rather than through the conductive ground connection of the connector. Direct current signals and other low frequency signals within the antenna apparatus, on the other hand, have a direct path to ground through the conductive ground connection. Because the RF signals flow predominantly through the capacitive ground connection, the likelihood that passive inter-modulation (PIM) products will be generated within the metal-to-metal junctions of the conductive ground connection is significantly reduced.
Microstrip Fed Log Periodic Antenna
US Patent:
6885350, Apr 26, 2005
Filed:
Mar 29, 2002
Appl. No.:
10/108931
Inventors:
Jeffrey A. Godard - Littleton CO, US
Steven C. Olson - Broomfield CO, US
Steven C. Olson - Broomfield CO, US
Assignee:
ARC Wireless Solutions, Inc. - Wheat Ridge CO
International Classification:
H01Q011/10, H01Q021/00
US Classification:
3437925, 343793, 343795, 343810
Abstract:
A microstrip fed log periodic antenna has two spaced dipole strips mounted on a ground plane. Each dipole strip has a trunk with a base, tip and alternating arms extending perpendicular to the trunk. One dipole strip includes an integral transmission feed line that extends from the tip, along the trunk of the other dipole strip at constant distance and along the ground plane at a constant distance. The one piece dipole strip with the integral transmission feed line reduces passive intermodulation and simplifies manufacture.
Antenna System
US Patent:
6121929, Sep 19, 2000
Filed:
Jun 30, 1997
Appl. No.:
8/884865
Inventors:
Steven Carter Olson - Broomfield CO
Jeffrey Allan Godard - Littleton CO
Jeffrey Allan Godard - Littleton CO
Assignee:
Ball Aerospace & Technologies Corp. - Boulder CO
International Classification:
H01Q 138
US Classification:
343700
Abstract:
The present invention relates to an antenna system that is particularly suited for use in communications systems implementing wireless local loops. In its preferred embodiment, the antenna comprises an array of air loaded stacked patch antenna elements suspended above a ground plane. The antennas each operate in a dual slant 45 linearly polarized mode and are fed by air loaded microstrip transmission line feeds. The line widths of the feed lines are uniform throughout the design, thereby eliminating the need for impedance transformers. The electronics for the antenna is located beneath the antenna ground plane to reduce the footprint of the antenna. In addition, a "connectorless" coupling structure is provided for transferring signals between the antenna elements and the underlying electronics. In one embodiment, an antenna is provided having enhanced sidelobe suppression despite having a limited number of side by side elements in a plane of interest.