Robert John Allison

US Patent:

6414570, Jul 2, 2002

Filed:

Jun 6, 2000

Appl. No.:

09/588087

Inventors:

Lawrence Dalconzo - Los Angeles CA
Robert C. Allison - Rancho Palos Verdes CA
Tamrat Akale - Torrance CA
James M. Harris - Encinitas CA
Herbert K. Jew - Gardena CA

Assignee:

Raytheon Company - Lexington MA

International Classification:

H01P 120

US Classification:

333202, 333205

Abstract:

A multi-channel microwave switched filter bank, wherein the input circuitry and output circuitry are mounted on opposite sides of the filter bank, providing a compact structure with excellent isolation. The filter bank includes a set of microwave band pass filter circuits. A housing structure provides an outer conductive peripheral frame structure. A rack structure disposed within the housing structure has a plurality of elongated slots for mounting therein corresponding ones of the plurality of filter circuits. A top dielectric substrate board is mounted adjacent a first side of the rack structure and has a first set of openings formed therein for providing access to a first set of input/output (I/O) ports of the plurality of filter circuits. A bottom dielectric substrate board is mounted adjacent a second side of the rack structure opposite the first side and has a second set of openings formed therein for providing access to a second set of input/output (I/O) ports of the plurality of filter circuits.

US Patent:

6624720, Sep 23, 2003

Filed:

Aug 15, 2002

Appl. No.:

10/219889

Inventors:

Robert C. Allison - Rancho Palos Verdes CA
Jar J. Lee - Irvine CA

Assignee:

Raytheon Company - Lexington MA

International Classification:

H01P 110

US Classification:

333105, 342373, 342374

Abstract:

A micro electromechanical system (MEMS) transfer switch for simultaneously connecting two radio frequency (RF) input transmission lines among two RF output transmission lines. The MEMS transfer switch includes a plurality of series MEMS switching units operatively arranged with the input and output transmission lines to selectively connect a first input to a first output and a second input to a second output, or the second input to the first output and the first input to the second output.

US Patent:

6728432, Apr 27, 2004

Filed:

Nov 13, 2002

Appl. No.:

10/294518

Inventors:

Samuel D. Tonomura - Rancho Palos Verdes CA
Robert C. Allison - Rancho Palos Verdes CA
Brian M. Pierce - Moreno Valley CA

Assignee:

Raytheon Company - Waltham MA

International Classification:

G02B 612

US Classification:

385 14

Abstract:

A first MEM is mounted on a substrate having a first contact and a second contact is mounted on a substrate. A PA power cell is thermally connected to the substrate using a thermal bump. The power cell is electrically insulated from the substrate. The power cell has a first power cell bump and a second power cell bump as pathways for I/O functions. A first insulator is mounted on the substrate supporting a second MEM above the substrate. The second MEM has a first connection and a second connection The first connection and the second connection are located on a bottom surface of the second MEM. A first conductive via vertically traverses the first insulator and is connected to the first connection from the second MEM. This first conductive via is further connected to a first conductor. The first conductor is insulated from substrate by a first insulating layer.

US Patent:

6741207, May 25, 2004

Filed:

Jun 30, 2000

Appl. No.:

09/607604

Inventors:

Robert C. Allison - Rancho Palos Verdes CA
Clifton Quan - Arcadia CA
Brian M. Pierce - Moreno Valley CA

Assignee:

Raytheon Company - Waltham MA

International Classification:

H01Q 338

US Classification:

342371, 342375, 333164

Abstract:

An RF phase shifter circuit includes first and second RF ports, and a switch circuit comprising a plurality of micro-electro-mechanical (âMEMâ) switches responsive to control signals. The switch circuit is arranged to select one of a plurality of discrete phase shift values introduced by the phase shifter circuit to RF signals passed between the first and second RF ports. The circuits can be connected to provide a single-pole-multiple-throw (SPMT) or multiple-pole-multiple-throw (MPMT) switch function. The phase shifter circuits can be used in an electronically scanned array including a linear array of radiating elements, with an array of phase shifters coupled to the radiating elements. An RF manifold including a plurality of phase shifter ports is respectively coupled to a corresponding phase shifter RF port and an RF port. A beam steering controller provides phase shift control signals to the phase shifters to control the phase shift setting of the array of the phase shifters.

US Patent:

6762660, Jul 13, 2004

Filed:

May 29, 2002

Appl. No.:

10/157355

Inventors:

Robert C. Allison - Rancho Palos Verdes CA

Assignee:

Raytheon Company - Waltham MA

International Classification:

H01P 120

US Classification:

333204, 333161, 333202

Abstract:

A band pass filter circuit for microwave frequencies, including a plurality of parallel-coupled resonators formed in a planar transmission line medium, including coupling between alternate resonators in the form of transmission line gaps.

US Patent:

6822615, Nov 23, 2004

Filed:

Feb 25, 2003

Appl. No.:

10/373936

Inventors:

Clifton Quan - Arcadia CA
Jar J. Lee - Irvine CA
Brian M. Pierce - Moreno Valley CA
Robert C. Allison - Rancho Palos Verdes CA

Assignee:

Raytheon Company - Waltham MA

International Classification:

H01Q 300

US Classification:

343754, 342376

Abstract:

A microelectromechanical system (MEMS) steerable electronically scanned lens array (ESA) antenna and method of frequency scanning are disclosed. The MEMS ESA antenna includes a wide band feedthrough lens and a continuous transverse stub (CTS) feed array. The wide band feedthrough lens includes first and second arrays of wide band radiating elements and an array of MEMS phase shifter modules disposed between the first and second arrays of radiating elements. The continuous transverse stub (CTS) feed array is disposed adjacent the first array of radiating elements for providing a planar wave front in the near field. The MEMS phase shifter modules steer a beam radiated from the CTS feed array in two dimensions.

US Patent:

6849924, Feb 1, 2005

Filed:

May 9, 2002

Appl. No.:

10/143180

Inventors:

Robert C. Allison - Rancho Palos Verdes CA, US
Jar J. Lee - Irvine CA, US

Assignee:

Raytheon Company - Waltham MA

International Classification:

H01L 2358

US Classification:

257635, 257736, 257750, 438 50, 438750, 365200

Abstract:

A multilayer switching assembly for switching high frequency signals has MEMS structures on a ceramic substrate having a top surface, a bottom surface and a plurality of insulating layers. The insulating layers are separated by a first conductor and a second conductor. The first conductor is connected to a ground potential. The second conductor is separated from the first conductor by one of the insulating layers. The second conductor presents a specific impedance (50 ohms) with respect to the first conductor to high frequency signals traveling on the second conductor. 64 MEMS structures are mounted on the top surface. Each MEMS has an input, an output, and a control. The input connected to the second conductor. The output is connected to a coplanar waveguide placed on the top surface. The control is connected to the bottom surface.

US Patent:

6882247, Apr 19, 2005

Filed:

May 15, 2002

Appl. No.:

10/146186

Inventors:

Robert C. Allison - Rancho Palos Verdes CA, US
Jerold K. Rowland - Torrance CA, US
Thomas M. Sharpe - Fountain Valley CA, US

Assignee:

Raytheon Company - Waltham MA

International Classification:

H03H007/01

US Classification:

333182, 333183, 333260

Abstract:

A filtered button DC interconnect employing a compressible conductor such as a finely wound wire mesh imbedded within a series of dielectric and ferrite cylinders. The compressible conductor is captivated within the series of dielectric and ferrite cylinders to ensure proper contact with mating surfaces of interconnected circuits. The interconnect serves as an RF filter by providing rejection of RF and microwave frequencies between the interconnected circuits.