Patents Assigned to M/A-Com
  • Splitter/combiner circuit
    Publication number: 20070216495
    Abstract: A circuit for combining/splitting first and second RF signals having different wavelengths of x and y, respectively, the circuit comprising: (a) first and second transmission portions coupled at an intersection, the first transmission portion comprising at least two intersecting transmission lines, each having a length which is an odd multiple of about ¼ y, the second transmission portion comprising at least two intersecting transmission lines, each having a length which is an odd multiple of about ¼ x; and (b) first, second and third ports, the first port located at the first transmission portion, the second port located at the intersection of the first and second transmission portions, and the third port being located at the second transmission portion, the first and second ports being electrically coupled, and the second and third ports being electrically coupled.
    Type: Application
    Filed: November 14, 2006
    Publication date: September 20, 2007
    Applicant: M/A-Com, Inc.
    Inventor: Clyde Maynord Callewaert
  • Inductor topologies and decoupling structures for filters used in broadband applications, and design methodology thereof
    Patent number: 7259639
    Abstract: Inductor topologies for filters used in broadband applications are described. In one implementation, an apparatus, such as an interface module includes a printed circuit board and a filter. The filter includes a generally circular high Quality factor (Q) value spiral planar inductor etched directly into the printed circuit board. The generally circular high Q value spiral planar inductor is configured to operate in a broadband application. Other implementations involve the use of decoupling structures with respect to the planar inductors as well as a design methodology for the filters.
    Type: Grant
    Filed: March 28, 2003
    Date of Patent: August 21, 2007
    Assignee: M/A-Com Eurotec, B.V.
    Inventors: Deirdre Anne DeBhailis, Bill Allen Keeney, Piotr Miroslaw Solski
  • Estimating time delays in a simulcast communication system
    Publication number: 20070184862
    Abstract: A method for facilitating an equalization of a simulcast signal comprising: (a) receiving a simulcast signal comprising known data simulcast from at least two different sites; (b) generating a number of simulated simulcast signals, each simulated simulcast signal being based on at least two sites transmitting said known data with a presumed time delay, each simulated simulcast signal having a different presumed time delay; (c) determining which of said simulated simulcast signals is an optimum simulated simulcast signal that correlates most closely to said simulcast signal; and (d) providing time delay data of said optimum simulated simulcast signal for use in equalization of said simulcast signal.
    Type: Application
    Filed: February 9, 2006
    Publication date: August 9, 2007
    Applicant: M/A-Com, Inc.
    Inventor: Mac Hartless
  • Non-magnetic, hermetically-sealed micro device package
    Patent number: 7253029
    Abstract: A process for preparing an electronic package comprising: (a) providing a ceramic housing defining an internal cavity for receiving a micro device and having one or more interface portions; (b) treating the housing to form a tungsten layer on the interface portions; and (c) overlaying a palladium layer on the tungsten layer.
    Type: Grant
    Filed: March 10, 2004
    Date of Patent: August 7, 2007
    Assignee: M/A-Com, Inc.
    Inventors: Carl Geisler, Dennis O'Keefe
  • Apparatus, methods and articles of manufacture for dynamic differential delay correction
    Patent number: 7254195
    Abstract: The invention is directed to a system for dynamically correcting an electromagnetic wave by processing two or more aspects of the electromagnetic wave along two or more separate signal paths; comparing an expected value for at least one of the aspects of the electromagnetic wave with an actual value for the aspect of the electromagnetic wave to generate a correction signal; and applying the correction signal to at least one other aspect of the electromagnetic wave. The aspects of the electromagnetic wave to be processed may be amplitude and phase, where the comparison may be along the phase path and the adjustment along an analog portion of the amplitude path. A digital phase locked loop may be used for the comparison and to generate the correction signal; and a bank of pipeline registers may be used to adjust the amplitude path.
    Type: Grant
    Filed: August 25, 2003
    Date of Patent: August 7, 2007
    Assignee: M/A-Com, Inc.
    Inventors: Robert Servilio, Carol Moy, Christine DiVincenzo, Yongwen Yang
  • Electromagnetic wave transmitter, receiver and transceiver systems, methods and articles of manufacture
    Patent number: 7254186
    Abstract: The invention is directed to a system for processing an electromagnetic wave by receiving rectangular coordinate information for the electromagnetic wave; and directly converting the rectangular coordinate information into a magnitude signal, a sin(?), and a cos(?) signal using a CORDIC algorithm, where ? represents a phase of the electromagnetic wave. The direct converting my be accomplished using shift and add/subtract operations in a processor and a look-up table, or by using at least two cascaded processors employing the CORDIC algorithm.
    Type: Grant
    Filed: July 22, 2003
    Date of Patent: August 7, 2007
    Assignee: M/A-Com, Inc.
    Inventor: Frank Liu
  • Dual band full duplex mobile radio
    Patent number: 7250830
    Abstract: A dual band full duplex mobile radio is provided that includes a transmit portion including a dual band filter and a receive portion including a dual band filter. The dual band full duplex mobile radio further includes a circulator connecting the transmit portion and the receive portion and configured to provide transmit and receive switching.
    Type: Grant
    Filed: December 30, 2004
    Date of Patent: July 31, 2007
    Assignee: M/A Com Inc.
    Inventors: Dennis Ray Layne, John Alan Greenwood, Jr., Brian Douglas Justin, Jr.
  • Series/shunt switch and method of control
    Patent number: 7250804
    Abstract: A switch includes at least two signal ports in series with a series FET connected therebetween, and a shunt path having an FET, whereby an input bias is applied to a gate on the series FET and to a drain on the shunt FET. In one embodiment, the switch includes a control signal input, an FET connected in series across the first port and the second port, the series FET having a gate coupled to the control signal input, and a shunt path provided by an FET, the shunt FET having a drain coupled to the control signal input and to the gate of the series FET, whereby a single control signal is applied to both the series FET and the shunt FET, via the control signal input, in order to turn the series FET on and simultaneously turn the shunt FET off and, conversely, in order to turn the series FET off and simultaneously turn the shunt FET on.
    Type: Grant
    Filed: August 26, 2003
    Date of Patent: July 31, 2007
    Assignee: M/A -COM, Inc.
    Inventor: Christopher N. Brindle
  • Apparatus, methods and articles of manufacture for processing an electromagnetic wave
    Patent number: 7245183
    Abstract: A method of processing an electromagnetic wave comprises regulating at least two independently controllable current sources with a signal determined from at least one characteristic of the electromagnetic wave to generate a processed electromagnetic wave from at least one of the independently controllable current sources.
    Type: Grant
    Filed: March 25, 2003
    Date of Patent: July 17, 2007
    Assignee: M/A-Com Eurotec BV
    Inventors: Pierce Joseph Nagle, Andrei Grebennikov, Frank Sharpe, Gerard Quilligan
  • Elliptical dielectric resonators and circuits with such dielectric resonators
    Publication number: 20070159275
    Abstract: In accordance with principles of the present invention, a two or more pole dielectric resonator circuit is provided with resonators that are elliptical in cross section orthogonal to the longitudinal axis. The resonators are mounted so that they are rotatable about their longitudinal axes, such that the straight line distance between two adjacent resonators measured in a straight line between orthogonal to and intersecting the longitudinal axes of the tow resonators is a function of the orientation of the resonators about their longitudinal axes. The resonators can be oriented about their longitudinal axes in any orientation to adjust their spacing, which is directly proportional to their coupling magnitude, which, in turn, is proportional to the bandwidth of the circuit.
    Type: Application
    Filed: January 12, 2006
    Publication date: July 12, 2007
    Applicant: M/A-Com, Inc.
    Inventors: Neil Craig, Paul Schwab, Kristi Pance
  • Self-calibrating radio
    Patent number: 7242910
    Abstract: A self-calibrating radio is described. In one exemplary implementation, a radio signal from its local voltage controlled oscillator. The calibration system automatically calibrates the radio by: (i) receiving a reference signal having a calibrated reference frequency, (ii) comparing the local frequency to the reference frequency to determine whether there is a difference between the local frequency and the reference frequency and (iii) adjusting the local frequency by an offset frequency, if the difference between the local frequency and the reference frequency is greater than a threshold value.
    Type: Grant
    Filed: February 3, 2003
    Date of Patent: July 10, 2007
    Assignee: M/A-COM, Inc.
    Inventors: Eugene Harold Peterson, III, William Oscar Janky
  • Compact broadband patch antenna
    Publication number: 20070126638
    Abstract: The invention provides a compact patch antenna having a cavity underneath the driver patch, so that the electromagnetic volume of the antenna is expanded without increasing the overall area of the antenna. More specifically, the compact patch antenna comprises a base layer having a cavity, a ground plane located on the base layer, and having an opening over at least a portion of the cavity, a substrate located on the ground plane, and a driver patch located on the substrate. The invention further provides a method for constructing a compact patch antenna, comprising the steps of providing a base layer having a cavity, providing a ground plane located on the base layer, and having an opening over at least a portion of the cavity, providing a substrate located on the ground plane, and providing a driver patch located on the substrate.
    Type: Application
    Filed: December 2, 2005
    Publication date: June 7, 2007
    Applicant: M/A-COM, Inc.
    Inventor: Eswarappa Channabasappa
  • System and method of using absorber-walls for mutual coupling reduction between microstrip antennas or brick
    Publication number: 20070126620
    Abstract: A multi-element antenna with sufficiently small return loss and mutual coupling signals to allow the simultaneous transmission of powerful radar signals and the reception of faint target return signals. The microstrip patch antenna has radio frequency absorbing material place between neighboring antenna elements to reduce the mutual coupling leakage signals.
    Type: Application
    Filed: December 5, 2005
    Publication date: June 7, 2007
    Applicant: M/A-COM, Inc.
    Inventors: Eswarappa Channabasappa, Robert Egri
  • Dielectric resonators with axial gaps and circuits with such dielectric resonators
    Publication number: 20070115080
    Abstract: A dielectric resonator with an air (or other dielectric) gap axially interrupting the body of the resonator and circuits employing such resonators. Preferably, the resonator body is conical or a stepped cylinder. However, the invention also is workable with a straight-sided cylindrical resonator body.
    Type: Application
    Filed: September 27, 2005
    Publication date: May 24, 2007
    Applicant: M/A-Com, Inc.
    Inventors: Kristi Pance, Ronald Hebert, Paul Schwab
  • Electromagnetic wave transmitter, receiver and transceiver systems, methods and articles of manufacture
    Patent number: 7221915
    Abstract: The invention relates to a system for electromagnetic processing of an input wave involving receiving a modified signal derived from two or more signals that represent the input wave when combined; and regulating the modified signal using at least one analog signal containing a characteristic of the two or more signals. Embodiments of the invention may utilize in-phase and quadrature phase signals, where the magnitude portion of the signals may be used for regulating the modified signal. The modified signal may be created by modulating a characteristic of the I, Q signals, such as their sign, with an RF or other frequency carrier wave.
    Type: Grant
    Filed: June 25, 2003
    Date of Patent: May 22, 2007
    Assignee: M/A-Com, Inc.
    Inventors: Jeffrey William Tripp, Walid Khairy Mohamed Ahmed
  • Method and apparatus for limiting power amplifier voltage excursions
    Patent number: 7215193
    Abstract: A power amplifier circuit includes a circuit topology with first and second switching elements. The first and second switching elements have a closed state and an open state, wherein current flows between the switching elements when they are both in the closed state. The voltage across the first and second switching elements is regulated by a clamping element that sets the connection between the first and second switching elements to a reference voltage when the switching elements are in the off position. The power amplifier may be a switching power amplifier, and the first and second switching elements may be transistors.
    Type: Grant
    Filed: November 23, 2004
    Date of Patent: May 8, 2007
    Assignee: M/A-COM, Inc.
    Inventor: Dale Scott Douglas
  • connection arrangement for micro lead frame plastic packages
    Patent number: 7211887
    Abstract: A connection arrangement for a micro lead frame plastic (MLP) package is provided that includes a paddle configured to be connected to a circuit board and a first ground pad and a second ground pad each connected to the paddle. The first and second ground pads together with the paddle are configured to provide continuity of ground between the circuit board and a chip mounted to the paddle.
    Type: Grant
    Filed: November 30, 2004
    Date of Patent: May 1, 2007
    Assignee: M/A-Com, Inc.
    Inventors: Eswarappa Channabasappa, Richard Alan Anderson
  • RFID antenna rack assembly
    Publication number: 20070090957
    Abstract: An antenna rack assembly comprising a base, a top spaced apart from the base, at least two beam members, each fixedly attached at one end to the base and at another end to the top, for mounting at least one antenna component, and one or more covers removably attached to the beam members for covering components mounted to said beam members, the one or more covers having a curved contour and being made of a material suitable for radio frequency (RF) transmissions.
    Type: Application
    Filed: August 18, 2006
    Publication date: April 26, 2007
    Applicant: M/A-COM, Inc.
    Inventor: Albert Kozlovski
  • Electronically tunable dielectric resonator circuits
    Publication number: 20070090899
    Abstract: In order to permit electronic tuning of the frequency of a circuit including dielectric resonators, such as a dielectric resonator filter, tuning plates are employed adjacent the individual dielectric resonators. The tuning plates comprises two separate conductive portions and an electronically tunable element electrically coupled therebetween. The electronically tunable element can be any electronic component that will permit changing the capacitance between the two separate conductive portions of the tuning plates by altering the current or voltage supplied to the electronically tunable element. Such components include virtually any two or three terminal semiconductor device. However, preferable devices include varactor diodes and PIN diodes.
    Type: Application
    Filed: October 24, 2005
    Publication date: April 26, 2007
    Applicant: M/A-Com, Inc.
    Inventors: Paul Schwab, Kristi Pance, Neil Craig
  • SiGe differential cascode amplifier with miller effect resonator
    Patent number: 7205836
    Abstract: A high-power, high frequency (1–100 GHz) power amplifier, made using SiGe transistors. A differential common-emitter amplifier section supplies the voltage amplification, allowing the total voltage swing of the amplifier to be twice the breakdown voltage of the individual transistors. Current amplification is supplied by a differential common-emitter amplifier section, connected in cascode with the differential common-emitter amplifier section. Appropriately chosen resonators in the cascode connection resonate out the Miller effect, negative current feed back of the circuit at the amplifier's operational frequency, allowing the amplifier to provide high power output at the operational frequency.
    Type: Grant
    Filed: May 3, 2005
    Date of Patent: April 17, 2007
    Assignee: M/A-Com, Inc.
    Inventors: David Richard Helms, Robert Warrant Point, Jr.