Including Microwave Or Distributed Parameter Structure Patents (Class 332/163)
  • Patent number: 11052557
    Abstract: A razor includes one or more blades that are directly or indirectly heated by RF energy. A control circuit is connected to and operates a high frequency (HF) generator and a HF power amplifier (HFPA) for generating radio frequency (RF) energy throughout a range of controllable power levels. The generated RF energy is guided by a wave guide from the HFPA to a resonance chamber (i.e., band pass filter cavity). The RF energy is radiated from the resonance chamber towards the one or more blades which absorb the RF energy, thereby causing the temperature of the blades to increase. An energy source provides the electric current required for operating the control circuit, the HF generator and the HFPA. In another embodiment, the RF energy is radiated from the resonance chamber towards a heating element that increases in temperature and heats the blades by thermal conduction.
    Type: Grant
    Filed: September 24, 2019
    Date of Patent: July 6, 2021
    Assignee: HEATED BLADES HOLDING COMPANY, LLC
    Inventors: Louis D. Tomassetti, Felix Lazarev
  • Patent number: 10263565
    Abstract: A non-linear transmission line device includes a magnetic element having at least one end profiled to reduce demagnetization when the element is biased. The profile may be tapered, stepped, or smoothly curved. Also disclosed is a non-linear transmission device made up of a solid magnetic element, typically of flat rectangular form.
    Type: Grant
    Filed: June 25, 2014
    Date of Patent: April 16, 2019
    Assignee: BAE SYSTEMS plc
    Inventors: John Eric Dolan, Matthew James Jenkins
  • Patent number: 7023292
    Abstract: Polar modulators include a phase splitter, a controller, variable current sources, transistor circuits, and a combiner. The phase splitter splits a RF carrier signal into quadrature component signals that are 90 degrees out of phase with each other. The controller generates modulation control signals based on information that is to be transmitted. The variable current sources each generate a variable amplitude current signal based on a different one of the modulation control signals. Each of the transistor circuits amplify a different one of the quadrature component signals with a variable amplification based on the variable amplitude current signal from a different one of the variable current sources to generate an amplitude adjusted quadrature component signal. The combiner combines the amplitude adjusted quadrature component signals from each of the transistor circuits to generate a phase-modulated RF carrier output signal.
    Type: Grant
    Filed: December 17, 2003
    Date of Patent: April 4, 2006
    Assignee: Telefonaktiebolaget L.M. Dericsson
    Inventors: David R. Pehlke, Aristotele Hadjichristos
  • Patent number: 6163231
    Abstract: In a millimeter wave modulation of the direct modulation technology, the switching speed is increased and the modulation bandwidth is broadened. A millimeter wave modulator includes a millimeter wave waveguide. a switching element (PIN diode) disposed in the waveguide in which the switching element is turned on and off by a digital signal to achieve amplitude-modulation of a millimeter carrier wave propagating through the waveguide, and a shunt resistor connected to the switching element in parallel.
    Type: Grant
    Filed: September 13, 1999
    Date of Patent: December 19, 2000
    Assignee: Omron Corporation
    Inventor: Robert A. Phaneuf
  • Patent number: 5745017
    Abstract: A thick film construct and quadrature coupler for use in fabricating devices such as IQ modulators, IQ demodulators, vector modulators, image reject mixers, and multi-channel mixers. The thick film construct includes a dielectric substrate base with a metallized backside, a first metal trace deposited on the non-metallized side of the substrate base, a dielectric layer deposited over and around the first metal trace, and a second metal trace deposited on the dielectric layer. The first and second metal traces are aligned over their widths and lengths so to form a balanced transmission line structure where the first and second metal traces represent top and bottom lines in the balanced structure. This thick film structure serves as the foundation for microwave capacitors, mixers, and other transmission line based structures, including a quadrature coupler.
    Type: Grant
    Filed: September 17, 1996
    Date of Patent: April 28, 1998
    Assignee: RF Prime Corporation
    Inventor: Loren E. Ralph
  • Patent number: 5633613
    Abstract: The microwave impedance across an aperture in a conductive shield member of a transmission structure is varied as a microwave signal transits the aperture. The impedance is changed by positioning a variable impedance device across the aperture. A slit divides the shield member into two portions to facilitate the application of a modulating signal (56) across the device.
    Type: Grant
    Filed: February 22, 1995
    Date of Patent: May 27, 1997
    Assignee: Hughes Electronics
    Inventor: Perry A. MacDonald
  • Patent number: 5561401
    Abstract: The present invention has an object to provide a compact quadrature modulator manufactured at low cost in such a manner that an input level is low over a wide high frequency band, and few input signals are wrapped around an output terminal. The quadrature modulator is mainly constructed of a multi-layer substrate into which a 90-degree phase shifter is assembled, a semiconductor integrated modulator circuit into which two sets of 2-phase modulators and an output signal in-phase synthesizing circuit, and a lid. The multi-layer substrate is constructed of "n" pieces of layers in total, namely from a first substrate corresponding to an uppermost layer to an n-th substrate corresponding to a lowermost layer. The first substrate layer is a layer for assembling a semiconductor integrated circuit, or a layer for connecting a substrate with a semiconductor integrated circuit. The 90-degree phase shifter is constituted by distributed coupling circuits having wavelengths of .lambda.
    Type: Grant
    Filed: March 28, 1995
    Date of Patent: October 1, 1996
    Assignee: NEC Corporation
    Inventor: Masaho Mineo
  • Patent number: 5463357
    Abstract: A wide-band microwave modulator arrangement for an information transmission system, such as a video signal distribution system, in which signals from a microwave carrier signal source are split and directed over a first path comprising an attenuator and a second path comprising phase shift means and a balanced modulator, the output signals from the two paths being combined for transmission. Signals from the carrier signal source may also be directed over a third path including phase shift means and a second balanced modulator, amplified output signals from the first two paths being combined with output signals from this third path before transmission.
    Type: Grant
    Filed: June 17, 1994
    Date of Patent: October 31, 1995
    Assignee: Plessey Semiconductors Limited
    Inventor: Mervyn K. Hobden
  • Patent number: 5268658
    Abstract: A digital amplitude modulator receives a plurality of phase coherent input signals from a plurality of amplifiers (A1-An) respectively representing the bits of a plural bit digital word and converts them to a single output signal on an output with a first plurality of transformers having transformer ratios which vary substantially in accordance with a power of two corresponding to the significance of the bit represented by the input signal being converted thereby and a second plurality of transformers having primaries connected to the first plurality of transformers, respectively, and secondaries all connected in series together to an output terminal and transformer ratios which vary in substantial accordance with the same powers of two that the transformer ratio of the first plurality of transformers to which they are connected vary.
    Type: Grant
    Filed: June 24, 1992
    Date of Patent: December 7, 1993
    Assignee: Rockwell International Corporation
    Inventor: Richard C. Edwards
  • Patent number: 4868528
    Abstract: An microwave device of the diode-operated amplitude modulator or switch type is disclosed. The ring is formed by a source of symmetrical currents which powers the diodes connected to a load. When the diodes are off, they show a capacitance which gives a reactive current. To improve isolation or attenuation, the current in the load must be zero. This is obtained by mounting, on diagonals of the ring, two capacitors which give two currents that are equal and opposite to the two reactive currents.
    Type: Grant
    Filed: June 24, 1988
    Date of Patent: September 19, 1989
    Assignee: Thomson Hybrides et Microondes
    Inventors: Julien Prevot, Jean-Pierre Bonnet