Robert G Isom

US Patent:

7948441, May 24, 2011

Filed:

Apr 12, 2007

Appl. No.:

11/734517

Inventors:

Robert S. Isom - Allen TX, US

Assignee:

Raytheon Company - Waltham MA

International Classification:

H01Q 13/00

US Classification:

343772

Abstract:

In one embodiment, a low profile antenna according to the present invention comprises a balanced transmission line, electronic circuitry, and a parasitic element. The electronic circuitry is coupled to an interconnecting end of the transmission line and operable to direct electromagnetic energy through the transmission line to a terminating end. The parasitic element has a surface that is disposed at a predetermined distance from the terminating end and normal to the central axis such that the surface of the parasitic element covers an opening formed by the terminating end.

US Patent:

8134494, Mar 13, 2012

Filed:

Jun 2, 2009

Appl. No.:

12/476583

Inventors:

Robert S. Isom - Allen TX, US
Gordon R. Scott - Farmersville TX, US

Assignee:

Raytheon Company - Waltham MA

International Classification:

G01S 7/40

US Classification:

342170, 342173

Abstract:

According to one embodiment, simulating the mutual performance of an antenna array coupled to an electrical drive circuit includes receiving one or more cross-coupling matrices and a number of electrical circuit parameters. Each cross-coupling matrix comprises matrix elements that each represent a cross-coupling factor of one antenna element to another antenna element of the antenna array. The electrical circuit parameters model one or more characteristics of the electrical drive circuit. Performance of the microwave antenna array and the electrical drive circuit in a far-field environment is modeled according to the electrical circuit parameters and the cross-coupling matrices.

US Patent:

8259027, Sep 4, 2012

Filed:

Sep 25, 2009

Appl. No.:

12/567681

Inventors:

Robert S. Isom - Allen TX, US

Assignee:

Raytheon Company - Waltham MA

International Classification:

H01Q 1/50

US Classification:

343859

Abstract:

A differential feed notched radiator. A notched radiator includes a planar dielectric substrate having a first surface and an oppositely facing second surface, and a first conductive layer on the first surface and a second conductive layer on the second surface. The first and second conductive layers are patterned to provide a tapered notch in a first region of the planar dielectric substrate, the tapered notch having a first end and a second end wider than the first end, and the first and second conductive layers patterned to provide a balun in a second region of the planar dielectric substrate, the balun connected with the first end of the tapered notch. A conductive strip for transferring differential signals is embedded in the planar dielectric substrate between the first and second conductive layers, a portion of the conductive strip intersecting a portion of the tapered notch near the first end.

US Patent:

20090073075, Mar 19, 2009

Filed:

Sep 18, 2007

Appl. No.:

11/857279

Inventors:

Robert S. Isom - Allen TX, US

International Classification:

H01Q 1/50
H01Q 1/38

US Classification:

343859, 343700 MS

Abstract:

In one embodiment of the disclosure, a dual polarized antenna includes first and second active elements and at least one parasitic element disposed a predetermined distance from the first and second active elements. Circuitry is coupled to the first and second active elements and operable to generate electro-magnetic energy from the first and second active elements along a direction of propagation. The first active element having a direction of polarization that is different than a direction of polarization of the second active element.

US Patent:

20120154232, Jun 21, 2012

Filed:

Dec 14, 2010

Appl. No.:

12/968147

Inventors:

Robert S. Isom - Allen TX, US

International Classification:

H01Q 19/06

US Classification:

343753

Abstract:

An antenna system for reducing unwanted coupling and electromagnetic interference, the antenna system including a transmit module configured to send a signal, a receive module configured to receive the signal, a radome, and a resistive frequency selective surface circuit configured to reduce a coupled portion of the signal, the resistive frequency selective surface circuit disposed in a path of the coupled portion of the signal.

US Patent:

20230092709, Mar 23, 2023

Filed:

Sep 17, 2021

Appl. No.:

17/477860

Inventors:

- Waltham MA, US
Robert S. Isom - Allen TX, US

Assignee:

Raytheon Company - Waltham MA

International Classification:

H01Q 1/48
H01R 25/00
H05K 5/00
H01Q 21/00

Abstract:

An assembly comprises a first subassembly, a second subassembly, and a conductive grounding element. The first subassembly comprises a first module comprising a first ground plane and a first conductive region in operable communication with the first ground plane. The second subassembly comprises a second module comprising a second ground plane distinct from the first ground plane and a second conductive region in operable communication with the second ground plane. The first and second subassemblies attach to each other along a seam. The conductive grounding element comprises an electrically conductive material including a first portion disposed adjacent to the first conductive region and a second portion disposed adjacent the second conductive region. The conductive grounding element is configured to fill one or more gaps in the seam and to operably couple together the first and second ground planes of the first and second subassemblies into a third common ground plane.

US Patent:

20190356058, Nov 21, 2019

Filed:

May 17, 2019

Appl. No.:

16/415292

Inventors:

- Waltham MA, US
Robert S. Isom - Allen TX, US
Ralston S. Robertson - Northridge CA, US

Assignee:

Raytheon Company - Waltham MA

International Classification:

H01Q 21/06
H01Q 21/24
H01Q 1/38

Abstract:

Described is a radio frequency (RF) array antenna element provided from a multi-layer printed circuit board (PCB) having disposed thereon a plurality of dual-polarized antenna elements with each of the dual-polarized antenna elements disposed to define a segmentation cut plane therebetween to enable size modification and modular construction of the RF array antenna.

US Patent:

20190044234, Feb 7, 2019

Filed:

Aug 4, 2017

Appl. No.:

15/731906

Inventors:

- Waltham MA, US
Robert S. Isom - Allen TX, US

Assignee:

Raytheon Company - Waltham MA

International Classification:

H01Q 7/00
H01Q 21/00
H01Q 21/24

Abstract:

In accordance with the concepts, systems, methods and techniques described herein a tripole current loop radiating element is provided having three conductors disposed on a substrate with the three conductors being physically spaced apart from each other and arranged to be responsive to radio frequency (RF) signals at a desired frequency range. Each of the three conductors includes a ground via to couple the respective conductor to a ground plane and a signal via to receive RF signals from a single feed circuit. The feed circuit includes a signal port, and first, second and third antenna ports, with each of the antenna ports coupled to a respective one of the three conductors. The feed circuit can provide the RF signals to each of the three conductors having equal amplitudes and distributed with relative phases of 0/120/240 respectively (i.e., phase shifted by 120 from an adjacent conductor).