Charles E Gilbert

US Patent:

20130241788, Sep 19, 2013

Filed:

Apr 27, 2012

Appl. No.:

13/457546

Inventors:

Joseph M. Anderson - Tucson AZ, US
Jared W. Jordan - Sahuarita AZ, US
Charles C. Gilbert - Tucson AZ, US

Assignee:

Raytheon Company - Waltham MA

International Classification:

H01Q 13/00
H01Q 13/10
H01P 11/00
H01Q 13/02

US Classification:

343771, 343772, 343786, 29600

Abstract:

Presently disclosed is an antenna system having an array of ridged waveguide Vivaldi radiator (RWVR) antenna elements fed through a corporate network of suspended air striplines (SAS). The SAS transfers the electromagnetic energy to the radiating element via the ridged waveguide coupler. The Vivaldi radiator matches the output impedance of the ridged waveguide coupler/SAS to the impedance of the surrounding medium. Because the coupling method and the radiating elements are wideband mediums, this antenna array is capable of wideband operation. The physical dimensions of the resulting array are also not as sensitive to its electrical performance as other antenna designs since the bandwidth is quite large, reducing the occurrence of an out-of-specification antenna due to manufacturing tolerance build-up. This also reduces the complexity of the manufacturing process, which in turn lowers cost.

US Patent:

20130241791, Sep 19, 2013

Filed:

Apr 27, 2012

Appl. No.:

13/457547

Inventors:

Joseph M. Anderson - Tucson AZ, US
Jared W. Jordan - Sahuarita AZ, US
Charles G. Gilbert - Tucson AZ, US

Assignee:

Raytheon Company - Waltham MA

International Classification:

H01Q 1/48

US Classification:

343848

Abstract:

Presently disclosed is an antenna system having an array of ridged waveguide Vivaldi radiator (RWVR) antenna elements fed through a corporate network of suspended air striplines (SAS) with an electromagnetic bandgap (EBG) ground plane surrounding the ridged waveguide transition. The SAS transfers the electromagnetic energy to the radiating element via the ridged waveguide coupler. The Vivaldi radiator matches the output impedance of the ridged waveguide coupler/SAS to the intrinsic impedance of the surrounding medium. The EBG, which may be comprised of a photonic bandgap material or other metamaterial, allows for better frequency and bandwidth performance in a lower-profile array package, thereby reducing size and weight of the array for applications requiring small size and or low-inertia packaging. In alternate embodiments, radiating elements other than Vivaldi radiators may be used. This configuration also reduces the complexity of the manufacturing process, which in turn lowers cost.

US Patent:

20140009346, Jan 9, 2014

Filed:

Jul 9, 2012

Appl. No.:

13/543989

Inventors:

Joseph M. Anderson - Tucson AZ, US
Herbert A. Leach - Tucson AZ, US
Charles G. Gilbert - Tucson AZ, US

Assignee:

Raytheon Company - Waltham MA

International Classification:

H01Q 19/06
H01Q 1/28

US Classification:

343705, 343833

Abstract:

A scanned radio frequency (RF) antenna having a small volume is described.

US Patent:

20170133762, May 11, 2017

Filed:

Nov 10, 2015

Appl. No.:

14/936711

Inventors:

- Waltham MA, US
Charles G. Gilbert - Tucson AZ, US
Jack H. Anderson - Tucson AZ, US
Robyn Jimenez - Vail AZ, US

Assignee:

RAYTHEON COMPANY - Waltham MA

International Classification:

H01Q 9/04
H01Q 1/42
H01Q 1/48
H01Q 1/12

Abstract:

A fixed beam ramp electromagnetic band gap (EBG) antenna including a radiating element and an electromagnetic band gap (EBG) structure both disposed within a ramped cavity. The cavity is designed with the ramp leading to the EBG structure disposed about a base of the cavity. The radiating element can be disposed above the EBG structure and the EBG structure may have a plurality of unit cells. The EBG structure can be provided both, horizontally on the floor of the cavity and vertically along a back wall of the cavity. The use of both horizontal and vertical EBG structures combined with the ramped cavity increases the bandwidth and enhances the beam steering of the antenna system.

US Patent:

20160064825, Mar 3, 2016

Filed:

Aug 29, 2014

Appl. No.:

14/472435

Inventors:

- Waltham MA, US
Charles G. Gilbert - Tucson AZ, US
Sergio A. Pizarro - Vail AZ, US

International Classification:

H01Q 13/00
H01Q 1/36
H01Q 1/27

Abstract:

An antenna is provided from a dielectric wedge waveguide having an AMC wall feed structure coupled thereto through a transition which matches the impedance of the AMC feed structure to dielectric wedge so as to ensure efficient transmission of RF signals between the AMC wall feed structure and the dielectric wedge. In some embodiments, the antenna may be implemented as a flush mounted or conformal antenna on an outer surface of a supporting platform.

US Patent:

20150130673, May 14, 2015

Filed:

Nov 12, 2013

Appl. No.:

14/077409

Inventors:

- Waltham MA, US
Charles G. Gilbert - Tucson AZ, US

Assignee:

Raytheon Company - Waltham MA

International Classification:

H01Q 19/02
G06F 17/50
H01Q 1/32
H01Q 1/42
H01Q 1/34
H01Q 1/28

US Classification:

343713, 343787, 716122

Abstract:

An antenna includes a radiating element that is held in a fixed orientation with respect to an underlying electromagnetic band gap (EBG) structure. In one embodiment, the radiating element and the EBG structure are both housed within a conductive cavity. The radiating element, the EBG structure, and the cavity are designed together to achieve an antenna having improved operational characteristics (e.g., enhanced bandwidth, beam steering, etc.). In some embodiments, the antenna may be implemented as a flush mounted or conformal antenna on an outer surface of a supporting platform.

US Patent:

20150029062, Jan 29, 2015

Filed:

Jul 24, 2013

Appl. No.:

13/949505

Inventors:

- Waltham MA, US
Charles G. Gilbert - Tucson AZ, US

Assignee:

Raytheon Company - Waltham MA

International Classification:

H01Q 15/24
H01Q 1/27

US Classification:

343713, 343756

Abstract:

A rotationally polarized antenna includes a radiating element that is held in a skewed orientation with respect to an underlying polarization-dependent electromagnetic band gap (PDEBG) structure. The radiating element and the PDEBG structure are both housed within a conductive cavity. The radiating element, the PDEBG structure, and the cavity are designed together to achieve an antenna having improved operational characteristics (e.g., an enhanced circular polarization bandwidth, etc.). In some embodiments, the antenna may be implemented as a flush mounted or conformal antenna on an outer surface of a supporting platform.