Raytheon Company

Christopher M Laighton

Susan C Trulli

Elicia K Harper

Alan J Bielunis

Istvan Rodriguez

Edward A Watters

Michael T Borkowski

Keith R Kessler

John P Bettencourt

Shahed Reza

Francois Y Colomb

James A Robbins

Philip M Henault

Steven C Evangelista

Michael F Parkes

Anthony J Silva

Jonathan B Langille

A radio frequency (RF) energy transmission line transition for coupling RF energy between a pair of RF transmission line sections disposed on intersecting surfaces of a corresponding one of a pair of conductive members, a first one of the pair of conductive members having a wall with a jog therein for receiving an end portion of a second one of the pair of conductive members, the end portion of an electrically conductive strip of the first one of the pair of radio frequency transmission line sections being disposed on, and electrically connected to, an electrically conductive strip of a second one of the pair of radio frequency transmission line sections.

Radio frequency (RF) energy transmission line transition structure

A branchline coupler structure having a pair of main transmission lines disposed on different horizontal levels of a support structure and a pair of shunt transmission lines, vertically disposed and laterally spaced, and disposed in the support structure. A first one of the pair of shunt transmission lines is coupled between: one region of a first one of the pair of main transmission lines and a first end of a second one of the pair of main transmission line. A second one of the pair of shunt transmission lines is coupled between a second region of the first one of the pair of main transmission lines, laterally spaced from the first region, and a second end of the second one of the main transmission lines.

Three-dimensional branch line coupler

A power amplifier having: a plurality of N amplifier modules, where N is an integer greater than one; an M:N power splitter having M inputs, where M is an integer less than N, and N outputs, each one of the N outputs being coupled to an input of a corresponding one of the plurality of N power amplifiers; a plurality of M delay lines, each one the M delay lines having an output coupled to a corresponding one of the M inputs of the M:N power splitter, each one of the plurality of M delay lines being coupled to a common input of the power amplifier.

High power radio frequency (RF) amplifiers

A MMIC support and cooling structure having a three-dimensional, thermally conductive support structure having a plurality of surfaces and a circuit having a plurality of heat generating electrical components disposed on a first portion of the surfaces and interconnected by microwave transmission lines disposed on a second portion of the plurality of surfaces of the thermally conductive support structure.

Circuit support and cooling structure

An electrically conductive shield for a microwave transmission line-electrical connector interconnect region wherein the microwave transmission line is connected to the electrical connector. An elastic, dielectric material is disposed between opposing surfaces of the dielectric structure and the housing. An electrically conductive material is disposed on an outer surface of the elastic, dielectric material to provide an electrically conductive shield. The electrically conductive shield is disposed over the opposing surfaces of the dielectric structure and the housing.

Radio frequency (RF) shielding structure for RF connector to microwave transmission interconnect regions and methods for manufacturing such RF shielding structure

A transmit/receive module having a switch, a load and a controller for coupling radar energy fed to switch to the load during a time interval subsequent to the controller producing a transmit enable signal to the transmit/receive module and prior to the controller producing a receive enable signal to the transmit/receive module.

Switchable transmit/receive (T/R) module

An RF coupler having: a pair of input ports; a pair of output ports; and a coupling region for coupling: a portion of an input signal at a first one of the input ports to first of the pair of output ports and another portion of the input signal fed to the first one of the input ports a second one of the output ports; and one portion of an input signal fed to a second one of the input ports to the second of the pair of output ports and another portion of the input signals fed to the second one of the input ports to the second one of the output ports. The coupling region comprises a plurality of serially connected, vertically stacked, coupling sections. Each one of a plurality of electrically conductive layers is disposed between a pair of the vertically stacked coupling sections.

RF coupler including vertically stacked coupling sections having conductive layers disposed between the coupling sections and the coupler including a surrounding electric shield

A quadrature coupler having: a pair of overlying strip conductors separated by a first dielectric layer to provide a coupling region between the coupling region of overlying strip conductors; a pair of opposing ground pads, the coupling region being disposed between the pair of opposing ground pads; a second dielectric layer disposed over the coupling region and between the pair of opposing ground pads; and an electrically conductive shield layer disposed over the second dielectric layer, extending over opposing sides of the dielectric layer and onto the pair of opposing ground pads. Portions of coupler are formed by printing or additive manufacturing.

Quadrature coupler

An RF circuit module having RF and DC contacts on a surface of a circuit board. An RF component having RF and DC contacts is disposed in a cavity of the circuit board. Electrical connectors bridge the cavity to connect the RF contacts on the circuit board to the RF contacts on the RE component and the DC, contacts on the circuit board to the DC contacts on the RF component. A plug member is disposed in the cavity which has a dielectric member with an outer portion disposed over the RF and DC contacts on the circuit board and an inner portion elevated above the RF and DC contacts the RF component. The plug member has one portion of electrical conductors disposed on an upper surface of the inner portion and another portion disposed under the outer portion on, and electrically connected to, the DC contacts on the circuit board.

Printed circuit board based RF circuit module

An amplifier having a Radio Frequency (RF) power level detector circuit for producing a control signal in accordance with a power level of an RF input signal. The control signal indicates whether the power level of the input signal is within a predetermined range of power levels greater than zero. A bias circuit is fed by the control signal, for producing a fixed bias voltage at a gate electrode of a field effect transistor (FET) to establish a predetermined quiescent current for the FET when the control signal indicates the power level of the RF input signal is within the predetermined range of power levels and to reduce the bias voltage to reduce the predetermined quiescent current when the control signal indicates the power level of the RF input signal is below the predetermined range of power levels.

Radio frequency power amplifier

A phase shifter is formed by providing a branchline coupler having a pair of phase adjusting sections. Each one of the phase adjusting sections is coupled to a corresponding one of a pair of shunt transmission line sections of the branchline coupler. Each one of the pair of phase adjusting sections includes: first and second conductive pads are disposed on the surface of a substrate having a gap between them; one of the pads being connected to a ground plane conductor on a bottom surface of the substrate. A series of conductive layer segment is sequentially written on the surface of the substrate in the gap electrically connected to sidewalls of the first and second pads. Phase shift through the phase shifter is measured after each one of the segments is written. The writing process is terminated when the measuring detects a predetermined phase shift through the phase shifter.

Phase shifter including a branchline coupler having phase adjusting sections formed by connectable conductive pads

A microwave transmission line structure having a pair of ground strip conductors on a surface of a dielectric substrate structure. A signal strip conductor is disposed on the surface of the dielectric substrate structure between the pair of ground strip conductors. A solid dielectric layer is disposed over: the signal strip conductor; the upper surface of the dielectric substrate structure between sides of each one of the ground strip conductors; and the signal strip conductor. An electrically conductive shield member is disposed on the solid dielectric layer and on, and in direct contact with, upper surfaces of the pair of ground strip conductors. The structure is used on each one of a plurality of proximate microwave transmission lines formed on the substrate structure to electrically isolate the transmission line.

Serially connected transmission line sections each having a conductive shield member overlying a portion of a strip conductor

A Field Effect Transistor (FET) having a substrate; a plurality of active regions disposed on the substrate; and a laterally extending finger-like control electrode disposed on a portion of a surface of the substrate. The active regions are laterally spaced one from the other successively along the laterally extending finger-like control electrode. The laterally extending finger-like control electrode controls a flow of carriers through each one of the plurality of active regions between a source electrode and a drain electrode.

Field effect transistor having staggered field effect transistor cells

A microwave transmission line having a coplanar waveguide and a pair of conductive members, each one of the pair of conductive members having a proximal end disposed on a portion of a corresponding one of a pair of ground plane conductors of the coplanar waveguide and a distal end disposed over, and vertically spaced from, a region between a center conductor of the coplanar waveguide and a corresponding one of the pair of ground plane conductors of the coplanar waveguide. The distal ends are laterally separated from each other by a region disposed over the center conductor.

Microwave transmission line having a 3-D shielding with a laterally separated region

A structure having pair of structure members separated by a gap and an interconnect structure member disposed in the gap. The interconnect structure member includes: a fill-structure having opposing sides in direct contact with the opposing sides of the first structure member and the second structure member; and, an interconnecting microwave transmission line disposed on the fill-structure electrically interconnecting the microwave transmission line of the first structure member to the second member structure. An electrically conductive member is disposed over a signal line of, and electrically connected to the ground conductor the interconnecting microwave transmission.

Growing community of inventors

Boxborough, MA, United States of America

Christopher M Laighton