Patents by Inventor Richard A. Stern

Richard A. Stern has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4564000
    Abstract: Ferrite material to be used in millimeter wavelength apparatus is sawed ug a resin bonded diamond sawblade. A cutting speed of 5400 cm/sec is achieved by appropriate selection of sawblade diameter and spindle speed, such as 5.71 cm and 18,000 RPM. With this cutting speed and sawblade material a cut up to a maximum of 0.356 cm is possible while the ferrite is fed at from 0.0254 to 0.127 cm/sec.
    Type: Grant
    Filed: July 6, 1984
    Date of Patent: January 14, 1986
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Richard A. Stern, Richard W. Babbitt
  • Patent number: 4542357
    Abstract: A dielectric waveguide ferrite resonance isolator capable of operating in e millimeter wave frequency range in a dielectric waveguide transmission line in which a thin rectangular hexagonal ferrite material is affixed to a side of the dielectric waveguide and then placed between the pole pieces of an electromagnet in order to magnitize and fully orient the ferrite material is improved by positioning a grooved block of dielectric having a low dielectric constant and high thermal conductivity against the face of the hexagonal ferrite so as to use the high thermal conductivity dielectric as a heat sink thereby extracting heat from the hexagonal ferrite.
    Type: Grant
    Filed: July 27, 1983
    Date of Patent: September 17, 1985
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Richard A. Stern, Richard W. Babbitt
  • Patent number: 4538123
    Abstract: A millimeter wavelength bandpass filter arrangement is produced by using a first dielectric waveguide as an input for a broadband signal to a ferrite circulator. This signal is delivered to a second dielectric waveguide having a bandstop filter formed therein. The bandstop filter reflects the desired bandpass frequency(s) back to the ferrite circulator where it is delivered to a third dielectric waveguide which is the output for the bandpass frequency(s).
    Type: Grant
    Filed: January 20, 1984
    Date of Patent: August 27, 1985
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Elio A. Mariani, Richard A. Stern, Richard W. Babbitt
  • Patent number: 4517536
    Abstract: The air gap in the joints between millimeter wavelength, dielectric waveguide circuit components is filled with a slurry made from an inorganic dielectric, such as barium titanate; and an organic binder, such as cellulose nitrate. The proportions of the dielectric and binder are taken so as to have a composite dielectric constant the same as that of the components being joined. This removes breaks or discontinuities and in turn reduces the insertion loss at the joints.
    Type: Grant
    Filed: September 29, 1982
    Date of Patent: May 14, 1985
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Richard A. Stern, Richard W. Babbitt
  • Patent number: 4516131
    Abstract: A variable slot conductance dielectric wavequide antenna in which the transmission line and radiating aperture is formed in one continuous, integrated and homogeneous material. The radiated antenna beam pattern is controlled by varying the conductance of radiating slots using varied geometries for each of the slots.
    Type: Grant
    Filed: February 4, 1983
    Date of Patent: May 7, 1985
    Assignee: The United States of America represented by the Secretary of the Army
    Inventors: William T. Bayha, John Borowick, Richard A. Stern, Richard W. Babbitt
  • Patent number: 4490700
    Abstract: A ferrite modulator/switch is disclosed for use in a dielectric waveguide ansmission line. A ferrite guide section inserted in a dielectric transmission line is longitudinally magnetized to cause a 90.degree. rotation of a wave traveling through the guide thereby inhibiting further propagation and resulting in the scattering out of wave energy away from the dielectric line.
    Type: Grant
    Filed: December 1, 1982
    Date of Patent: December 25, 1984
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Richard A. Stern, Richard W. Babbitt
  • Patent number: 4468673
    Abstract: A dielectric waveguide of rectangular cross-section has periodically spaced, transverse slots in its upper surface. When traveling waves of varying millimeter wavelength frequencies are applied to the waveguide, the slots perturb the waves resulting in radiation having a main lobe that scans as the frequency changes. The antenna is made rigid by the use of a dielectric support.
    Type: Grant
    Filed: August 18, 1982
    Date of Patent: August 28, 1984
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Richard A. Stern, Richard W. Babbitt, John Borowick
  • Patent number: 4459567
    Abstract: A dielectric waveguide ferrite resonance isolator capable of operating in the millimeter frequency range in a dielectric waveguide transmission line is provided. The isolator comprises a thin sheet of hexagonal ferrite material that has been affixed to a side of the dielectric waveguide and then placed between the pole pieces of an electromagnet in order to magnetize and fully orient the ferrite material.
    Type: Grant
    Filed: June 14, 1982
    Date of Patent: July 10, 1984
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Richard A. Stern, Richard W. Babbitt
  • Patent number: 4458218
    Abstract: A dielectric waveguide reciprocal ferrite phase shifter is provided for use n a dielectric waveguide transmission line. The phase shifter is comprised of a length of ferrite of the same cross-sectional dimension as that of the dielectric waveguide and in fact becomes a section of the transmission line. The length of ferrite bears a thin plastic layer on its top and bottom surface and metal plates on each piece of plastic. The length of this multilayer structure then has a wire coil wrapped around in order to provide a d.c. magnetic biasing field along the length of the ferrite thereby enabling magnetization of the ferrite resulting in a reciprocal phase shift or change in electrical length within the structure.
    Type: Grant
    Filed: June 14, 1982
    Date of Patent: July 3, 1984
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Richard W. Babbitt, Richard A. Stern
  • Patent number: 4446448
    Abstract: A Y-junction dielectric waveguide circulator is provided with a dielectric upport plate. At the vertex of adjacent dielectric waveguides are positioned metal tuning legs. These tuning legs are spaced from the waveguides and extend higher than them. Preferably the tuning legs are made integral with a cap positioned above the circulator junction. This cap also serves as a holder for the upper biasing magnet. The lower magnet is centered under the junction and bonded to the bottom of the support plate.
    Type: Grant
    Filed: August 13, 1982
    Date of Patent: May 1, 1984
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventor: Richard A. Stern
  • Patent number: 4424517
    Abstract: A monolithic waveguide radar front end subsystem utilizing dielectric coments. The use of dielectric waveguide transmission elements permits conformal mounting while exhibiting operating characteristics comparable to those of conventional metal waveguide subsystems.
    Type: Grant
    Filed: May 31, 1983
    Date of Patent: January 3, 1984
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Richard A. Stern, Richard W. Babbitt
  • Patent number: 4415871
    Abstract: Millimeter wave circulators are disclosed for use with millimeter wavelen dielectric waveguides. The structure comprises a prism of magnetized ferrimagnetic material with the waveguide ends bonded to the lateral faces of the prism. The waveguide ends and the lateral faces are congruent rectangles. The prisms may have triangular bases in which case a Y-junction circulator results, or square bases with waveguide ends attached to three out of four of the lateral faces thereof, whereby a T-junction circulator results.
    Type: Grant
    Filed: October 13, 1981
    Date of Patent: November 15, 1983
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Richard A. Stern, Richard W. Babbitt
  • Patent number: 4389650
    Abstract: A line source antenna adapted for a light weight, compact phased array radar and consisting of a plurality of radiating slots periodically located in one side wall of a length of waveguide, having a single monolithic ferrite phase shifter in the form of a long continuous toroid extending the length of all of the slots.
    Type: Grant
    Filed: November 10, 1980
    Date of Patent: June 21, 1983
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventor: Richard A. Stern
  • Patent number: 4092647
    Abstract: A line source antenna adapted for a light weight, compact phased array ra and consisting of a plurality of series fed radiating slots periodically located in the narrow side wall of a length of waveguide together with non-reciprocal latching ferrite phase shifters including dielectric loading sections and matching transformer sections on either side of phase shifters located between adjacent slot pairs.
    Type: Grant
    Filed: December 27, 1976
    Date of Patent: May 30, 1978
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: John Joseph Borowick, Boaz Gelernter, Nathan Lipetz, Richard A. Stern
  • Patent number: 3930847
    Abstract: The method of recovering copper by cementation using copper-iron materials as part of the cementation scrap, the copper and iron in said materials being substantially physically inseparable.
    Type: Grant
    Filed: March 15, 1974
    Date of Patent: January 6, 1976
    Assignee: The Anaconda Company
    Inventor: William Richard Stern