Thinkom Solutions, Inc.

Hughes Aircraft Company

Raytheon Company

Hughes Electronics Corporation

Other

Thinkom Soultions, Inc.

William W Milroy

Alan C Lemons

James Sor

Ronald I Wolfson

William Henderson

Shahrokh Hashemi-Yeganeh

Stuart B Coppedge

Eugene Yum

Steven W Drost

Alec Ekmekji

Te-Kao Wu

Louis E Gates, Jr

Mir Akbar Ali

Patrick J Fitzgerald

Gerald A Cox

Joseph P Smalanskas

Ruth Ann Mullen

Talat Y Kiani

Douglas O Klebe

Steven G Buczek

Kenneth Nash

James P Treinen

Michael S Geist

Tony M Economos

Shadrokh Hashemi-Yeganeh

Jonathan Sala

Raymond Valdes

Shahrokh Hashemi-Yaganeh

Donald B Mertens

Robert M Skuza

Shane H Hunter

Alan Lemons

Edward Kaszubski

Shahrokh Hashemi-Yageneh

A dual-mode polarizer for selectively switching between linear polarization and circular polarization includes a first meander-line polarizer, and a second meander-line polarizer spaced apart from the first meander-line polarizer to define a first gap therebetween. A first angular orientation between the first and second meander-line polarizers produces variably-oriented linear polarization of a signal passing through the first and second meander-line polarizers, and a second angular orientation between the first and second meander-line polarizers produces variably-oriented circular polarization of a signal passing through the first and second meander-line polarizers.

Wide-scan-capable polarization-diverse polarizer with enhanced switchable dual-polarization properties

Systems and methods for controlling pointing of a transmit antenna aperture of a phased array antenna are described herein. A modem may be configured to modulate carrier wave signals for transmission to an end target via the transmit antenna aperture. A transmit power level of the modem may be monitored, and pointing of the transmit antenna aperture may be adjusted based on the transmit power level. Additionally or alternatively, an indication of a carrier-to-noise level may be received, and pointing of the transmit antenna aperture may be adjusted based on the carrier-to-noise level.

Transmit phased array antenna pointing systems and methods

A system and method provide simultaneous dual polarization operation using a linearly-polarized planar antenna and a polarizer spaced apart from the linearly-polarized planar antenna, the polarizer including a first polarization state having primarily one of left-hand circular polarization (LHCP) or right-hand circular polarization (RHCP), and a third polarization state having linear polarization from which a combination of both LHCP and RHCP is simultaneously derived. The polarizer is placed in the first polarization state to at least one of transmit or receive a signal having primarily one of LHCP or RHCP, and the polarizer is placed in the third polarization state to simultaneously transmit and/or receive two different signals, where a first signal of the two different signals has primarily LHCP and a second signal of the two different signals has primarily RHCP.

Realization and application of simultaneous circular polarization in switchable single polarization systems

A linear-to-circular polarizer includes a meanderline polarizer having a plurality of meanderline conductor patterns, and a gridline polarizer having a plurality of conductors arranged in a grid pattern. The gridline polarizer is spaced apart from the meanderline polarizer by a first prescribed distance and the gridline polarizer is spaced apart from a planar antenna aperture of a planar antenna by a second prescribed distance.

Linear-to-CP polarizer with enhanced performance in VICTS antennas

A multiport microwave device includes a first reactive three-port microwave device, a second reactive three-port microwave device, a third reactive three-port microwave device, and a matched four-port microwave device. The four-port microwave device includes first and second input ports and first and second output ports communicatively coupled to one another. A first port of each of the first, second and third three-port microwave devices is operative to receive a microwave signal, and a first output port and a second output port of the four-port microwave device are each operative to output a microwave signal. A second port of the first microwave device is communicatively coupled to a second port of the second microwave device, a second port of the third microwave device is communicatively coupled to a third port of the second microwave device, and a third port of the first microwave device is communicatively coupled to the first input port the four-port microwave device. A third port of the third microwave device is communicatively coupled to the second input port of the four-port microwave device.

Lossless lobing circuit for multi-subarray tracking

A variable inclination continuous transverse stub antenna includes a first conductive plate and a second conductive plate spaced relative to the first conductive plate. The first conductive plate includes a first surface partitioned into a first region and a second different region, a first group of CTS radiators on the first region, and a second group of CTS radiators on the second region. A spacing and a width in an E-field direction of the first group of radiators is different in respect to a spacing and width in the E-field direction of the second group of radiators. The second conductive plate includes a second surface parallel to the first surface, the second surface partitioned into a first parallel plate transmission line and a second different parallel plate transmission line, the first and second parallel plate transmission lines configured to receive or output a different radio frequency signals from one another.

Partitioned variable inclination continuous transverse stub array

A waveguide coupler includes a waveguide having a first and a second port, and a slot formed in a broadwall of the waveguide between the first and second ports, the slot centered on the first broadwall. A plurality of shifted waveguide sections are arranged between the first and second ports and extend along a length of the waveguide. A parallel-plate transmission line structure is coupled to the slot, wherein RF signals within one of the waveguide or the parallel-plate transmission line are communicated to the other of the waveguide and the parallel-plate transmission line through the slot.

Offset block waveguide coupler

A waveguide-to-parallel-plate twist transition includes at least one waveguide-to-parallel plate twist transition element comprising an input port comprising an input waveguide portion, the input waveguide portion configured to orient an E-field of an electromagnetic wave along a first plane, and an output port comprising a multi-mode parallel plate portion, the multi-mode parallel plate portion configured to orient an E-field of an electromagnetic wave along a second plane, wherein an angle of orientation of the second plane is different from an angle of orientation of the first plane. The twist transition further includes at least one intermediate discrete twist waveguide stage coupling each input waveguide portion to the output multi-mode parallel plate portion, wherein at least one intermediate discrete twist waveguide stage is configured to orient an E-field of an electromagnetic wave along a third plane, wherein an angle of orientation of the third plane is between the angle of orientation of the first plane and the angle of orientation of the second plane.

Arrayed waveguide-to-parallel-plate twist transition with higher-order mode optimization

A waveguide rotary joint includes a first waveguide member comprising a first waveguide portion, and a second waveguide member comprising a second waveguide portion, the second waveguide member rotatably connected via a curved circumferential path to the first waveguide member, wherein the second waveguide portion is adjacent to the first waveguide portion to define a first split rectangular waveguide. A first waveguide input/output port is communicatively coupled to the first waveguide portion, and a second waveguide input/output port is communicatively coupled to the second waveguide portion. Relative rotation between the first waveguide member and the second waveguide member changes an angular length of the first waveguide connecting the first waveguide input/output port to the second waveguide input/output port.

Compact concentric split ring waveguide rotary joint

A parallel-plate diplexer includes a first parallel-plate transmission line and a second parallel-plate transmission line, a first end of the second parallel-plate transmission line including a first port and a second end of the second parallel-plate transmission line including a second port, and a first end of the first parallel-plate transmission line including a third port and a second end of the first parallel-plate transmission line being coupled to the second parallel-plate transmission line at a T-junction between the first port and the second port. The second parallel-plate transmission line includes a first parallel-plate transmission line tuning network located between the T-junction and the first port, and a second parallel-plate transmission line tuning network located between the T-junction and the second port.

High-Q dispersion-compensated parallel-plate diplexer

A multi-polarized continuous transverse stub (CTS) antenna includes a first feed network operative to at least one of receive or transmit a signal having a first polarization, and a second feed network different from the first feed network and operative to at least one of receive or transmit a signal having a second polarization different from the first polarization. At least one parallel-plate region is defined by a first plate structure and a second plate structure spaced apart from the first plate structure, where a first coupling structure connecting the first feed network to the parallel-plate region and a second coupling structure connecting the second feed network to the parallel-plate region. A common aperture is arranged on one side of the parallel-plate region, wherein wavefronts produced by the first and second coupling structures and propagated within the parallel-plate region radiate to free-space through the common aperture.

Dual-polarized fractal antenna feed architecture employing orthogonal parallel-plate modes

An antenna includes an aperture defining a feed area of the antenna, the aperture divided into a plurality of discrete subarrays, and a feed network having an input port, a plurality of output ports, and a plurality of conductors, each conductor connected between the input port and a respective output port the plurality of output ports, and each output port of the plurality of output ports connected to a respective subarray of the plurality of subarrays. A line length of one conductor of the plurality of conductors is different from a line length of another conductor of the plurality of conductors to introduce different time delays between the input port and the respective output ports.

Optimized true-time delay beam-stabilization techniques for instantaneous bandwith enhancement

An antenna system includes an antenna having an aperture, and a polarizer array. The polarizer array includes a support structure, at least two polarizer elements arranged relative to the support structure, each of the at least two polarizer elements rotatable about a separate axis, and an actuator coupled to the at least two polarizer elements, the actuator operative to effect common rotation of the at least two polarizer elements. The polarizer array is arranged to at least partially cover the antenna aperture.

Inscribed polarizer array for polarization diverse application

An antenna array employing continuous transverse stubs as radiating elements includes a first conductive plate structure including a first set of continuous transverse stubs arranged on a first surface, and a second set of continuous transverse stubs arranged on the first surface, wherein a geometry of the first set of continuous transverse stubs is different from a geometry of the second set of continuous transverse stubs. A second conductive plate structure is disposed in a spaced relationship relative to the first conductive plate structure, the second conductive plate structure having a surface parallel to the first surface. A relative rotation apparatus imparts relative rotational movement between the first conductive plate structure and the second conductive plate structure.

Growing community of inventors

Torrance, CA, United States of America

William W Milroy