John T Toth

US Patent:

6498582, Dec 24, 2002

Filed:

Aug 8, 2000

Appl. No.:

09/633298

Inventors:

Anthony Sweeney - Salem NH
Mark A. Hebeisen - Tewksbury MA
Andrew B. Forbes - Somerville MA
Ray Gingras - Merrimac MA
John Toth - Reading MA
Michael J. Delcheccolo - Andover MA
George La Fave - Tewksbury MA
Joseph Licciardello - Lawrence MA

Assignee:

Raytheon Company - Lexington MA

International Classification:

G01S 1344

US Classification:

342149, 342153, 342165, 342173, 342174

Abstract:

A passive MMIC monopulse comparator includes a plurality of lumped element hybrids having pi and T filter structures. In one embodiment, a first hybrid receives first and second downcoverted signals and provides a first output signal to a third hybrid and second output signal to a fourth hybrid. A second hybrid receives third and fourth downconverted signals and provides respective third and fourth output signals to the third and fourth hybrids. The third hybrid provides sum and elevation channel signals and the fourth hybrid provides azimuth and G channel signals.

US Patent:

43969216, Aug 2, 1983

Filed:

Oct 30, 1981

Appl. No.:

6/316458

Inventors:

Francis J. O'Hara - Bedford MA
John F. Toth - Reading MA
Jerold L. Weiss - Wayland MA
Armand R. Chinchillo - Saugus MA

Assignee:

Raytheon Company - Lexington MA

International Classification:

H01Q 326

US Classification:

343895

Abstract:

A matching section for a spiral antenna used in a monopulse receiver is shown to receive a plurality of coaxial cables at equally spaced points along the circumference of a first circle and to guide the center conductors of such cables to arms of a multi-arm spiral antenna at equally spaced points along the circumference of a second circle, the characteristic impedance along the length of the matching section changing smoothly for the sum and difference modes and impedance matching closely to the antenna sum and difference modes.

US Patent:

47001933, Oct 13, 1987

Filed:

Aug 19, 1983

Appl. No.:

6/524703

Inventors:

Norbert Sa - Burlington MA
William F. Miccioli - Acton MA
A. Robert Chinchillo - Saugus MA
John F. Toth - Reading MA

Assignee:

Raytheon Company - Lexington MA

International Classification:

G01S 502

US Classification:

342427

Abstract:

A monopulse receiving arrangement is shown to comprise orthogonally polarized and electrically separate monopulse antenna arrays, one such array being made up of juxtaposed slotted waveguides and the other being made up of at least one monopulse array of dipoles printed on a dielectric material.

US Patent:

50086812, Apr 16, 1991

Filed:

Jun 8, 1990

Appl. No.:

7/536043

Inventors:

Nunzio M. Cavallaro - Methuen MA
John F. Toth - Reading MA
Cleo J. Alexander - Marlborough MA

Assignee:

Raytheon Company - Lexington MA

International Classification:

H01Q 1380
H01Q 13080
H01Q 19300

US Classification:

343700MS

Abstract:

In a guided missile, a microstrip antenna, including a patch radiator with parasitic elements, flush-mounted and conforming to the side of the missile, producing an antenna beam which is tilted in required direction for use as a link or fuse antenna is shown. Parasitic elements are used to direct the beam away from the antenna normal to the desired direction.

US Patent:

45545499, Nov 19, 1985

Filed:

Sep 19, 1983

Appl. No.:

6/533836

Inventors:

Matthew Fassett - Billerica MA
John F. Toth - Reading MA
Michael L. Lewis - Arlington MA
William F. Miccioli - Acton MA

Assignee:

Raytheon Company - Lexington MA

International Classification:

H01Q 138
H01Q 1310

US Classification:

343700MS

Abstract:

A radar antenna is shown in a first embodiment to have a ground plane and a feed line on opposite sides of a dielectric sheet and a ring-shaped antenna element on another dielectric sheet to form a microstrip assembly wherein such antenna element is capacitively coupled to the feed line. In a second embodiment the radar antenna has a parasitic antenna element on still another dielectric sheet, such parasitic antenna element being in register with the ring-shaped antenna element.

US Patent:

40889700, May 9, 1978

Filed:

Feb 26, 1976

Appl. No.:

5/661676

Inventors:

Matthew Fassett - Billerica MA
Russell W. Hansen - Stoughton MA
John F. Toth - Billerica MA
Pietro Ventresca - Littleton MA

Assignee:

Raytheon Company - Lexington MA

International Classification:

H03H 720
H01P 118
H01P 516
H01P 900

US Classification:

333 31R

Abstract:

An octave band phase shifter/polarization switch is disclosed which is comprised of a plurality of serially coupled phase bits arranged to provide, in combination, a four bit phase shifter and a polarization switch capable of providing any selected one of six separate polarization senses. The device is fabricated in a stripline package and each of the phase bits is comprised of a hybrid coupler whose output ports are terminated in switchable reactances. Either packaged microwave P-I-N or N-I-P diodes are utilized as the switchable reactances, and bias voltage for the diodes is provided by means of an octave band choke, comprising a dielectrically loaded coil disposed within a center dielectric layer of the stripline package.

US Patent:

61008419, Aug 8, 2000

Filed:

Jun 19, 1998

Appl. No.:

9/100689

Inventors:

John Toth - Reading MA
Michael J. Delcheccolo - Andover MA
George LaFave - Tewksbury MA
Joseph Licciardello - Lawrence MA

Assignee:

Raytheon Company - Lexington MA

International Classification:

G01S 1344

US Classification:

342149

Abstract:

A compact RF monopulse receiver circuit having a relatively low noise figure which is particularly useful for operation in the millimeter wave frequency range is described. The compact monopulse receiver finds use in small projectile and small missile applications. Also, a combination of transmit signal protection circuitry and receiver circuit architecture allows the RF monopulse receiver circuit to operate in a missile or other projectile which utilizes high RF power transmit signals. The RF monopulse receiver circuit can directly provide a radiation pattern for target detection and tracking or alternatively, the RF monopulse receiver circuit can function as a monopulse feed circuit which can be used, for example, in a quasi-optically fed reflector antenna.

US Patent:

41763599, Nov 27, 1979

Filed:

Jul 18, 1977

Appl. No.:

5/816421

Inventors:

Matthew Fassett - Billerica MA
Seymour B. Pizette - Framingham MA
John F. Toth - Billerica MA

Assignee:

Raytheon Company - Lexington MA

International Classification:

H01Q 326

US Classification:

343854

Abstract:

A radio frequency antenna adapted to provide independently specifiable sum, azimuth, and elevation antenna patterns is disclosed. The antenna includes a plurality of rows of antenna elements each having a corresponding feed network. Each feed network has three row feed ports and couples energy between such feed ports and the corresponding row of antenna elements with independent amplitude and phase distributions. A second feed network couples energy between sum, azimuth, and elevation ports of the antenna and the three row feed ports of the feed networks with independent amplitudes and phase distribution to provide independent sum, azimuth, and elevation antenna patterns.