Patents by Inventor Norman R. Landry

Norman R. Landry 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: 5481234
    Abstract: The electrical length of a strip transmission line structure is adjusted by adding conductive projections from the ground planar conductors which extend in depth toward the strip conductor and in length along the strip conductor. These projections may preferably be formed by inward deformation of the ground planes at the desired locations. In strip transmission lines having the strip conductor positioned between two ground planes, projections are preferably added in aligned pairs with each ground plane providing one of the projections of the pair.
    Type: Grant
    Filed: December 19, 1983
    Date of Patent: January 2, 1996
    Assignee: Martin Marietta Corp.
    Inventors: Norman R. Landry, Edward J. Kent
  • Patent number: 5459474
    Abstract: An active array antenna, which may be used for radar, includes antenna elements (antelements) supported in a two-dimensional array. The fronts of the elements are protected by a cover. In order to allow easy repair, each column of antelements is associated with a slide-in carrier which simultaneously mates with all antelements of a column. Each carrier has a transmit-receive (TR) module for each antelement with which it mates, and a column beamformer. Each carrier also has logic modules and power supplies for the TR modules. The total width of each slide-in carrier with its TR modules, beamformer, logic and power supplies, is less than or equal to the column-to-column spacing. Each carrier can be slid out from the rear to expose all the active components for each column of antelements, so maintenance can be performed without environmental exposure.
    Type: Grant
    Filed: March 22, 1994
    Date of Patent: October 17, 1995
    Assignee: Martin Marietta Corporation
    Inventors: Joseph A. Mattioli, Ashok K. Agrawal, Norman R. Landry
  • Patent number: 5359339
    Abstract: A short horn antenna (10) adapted for array use includes a rectangular waveguide with broad upper (12) and lower (14) walls and narrow side walls (16, 18), defining a radiating aperture (20) and a feed end closed off by a shorting plate (22). A stepped upper ridge (26) has a slot (50) adjacent the shorting plate, and a shorter stepped lower ridge (46) has a corresponding slot. An unbalanced transmission line (75) extends through the shorting wall, and the smaller conductor (76) extends into the waveguide as an electric probe (60). The probe includes a first portion (64), extending parallel to the waveguide axis (8) and into the slot in the upper ridge. The probe (60) also includes a second portion (66) extending at an angle ( relative to the first portion (64) of the probe (60).
    Type: Grant
    Filed: July 16, 1993
    Date of Patent: October 25, 1994
    Assignee: Martin Marietta Corporation
    Inventors: Ashok K. Agrawal, Michael S. Perry, Norman R. Landry
  • Patent number: 5339086
    Abstract: An antenna array (10) includes a plurality of antenna elements (12), each of which is associated with a transmit-receive TR module (14). The antenna elements and their associated TR modules are grouped into sets, which in the illustrated embodiment are sets of four. Each set of four TR module/antenna elements is associated with one phase and gain controller (18.sub.X), which is part of a distributed phase and gain controller. The beam direction is commanded by a central radar control computer (RCC) (22), which transmits beam direction and other information to all the separate phase/gain controllers. Each separate phase/gain controller accesses local memory to obtain data relating to the location within the array of those antenna elements which it controls. Each phase/gain controller then calculates the necessary phase shift for each antenna element it controls, taking into account the phase and gain errors associated with the TR module associated therewith.
    Type: Grant
    Filed: February 22, 1993
    Date of Patent: August 16, 1994
    Assignee: General Electric Co.
    Inventors: Amedeo DeLuca, James E. Gentry, Sr., David L. Thomas, Norman R. Landry, Ashok K. Agrawal
  • Patent number: 5017927
    Abstract: A monopulse antenna array arrangement includes a transmit-receive processor (TR Proc) associated with each antenna element. Each TR Proc has a port associated with the radiating element and at least two further ports, one for a sum beamformer and another for a difference beamformer. Within each TR Proc, a switching arrangement allows transmitter signal to flow through a phase shifter and transmit amp during transmission, and allows received signal to flow through a low-noise amp and the same phase shifter on reception. Each TR Proc includes a coupling arrangement with a second phase shifter and a second output port, adapted to be coupled to a difference beamformer during reception.
    Type: Grant
    Filed: February 20, 1990
    Date of Patent: May 21, 1991
    Assignee: General Electric Company
    Inventors: Ashok K. Agrawal, Norman R. Landry
  • Patent number: 4678863
    Abstract: A corrosion resistant resilient electrically conductive gasket is comprised of a metal-containing conductive elastomer which has had any exposed metal coated with a protective conductive coating. The metal may be silver and the coating may be tin-lead solder applied by immersing the gasket into a molten solder bath.
    Type: Grant
    Filed: June 27, 1985
    Date of Patent: July 7, 1987
    Assignee: RCA Corporation
    Inventors: Robert M. Reese, Norman R. Landry
  • Patent number: 4458229
    Abstract: A waveguide dimensioned for fundamental mode operation over a given frequency range is rendered substantially dispersionless by including within the waveguide a thin dielectric slab extending parallel to the E-field of the fundamental mode and having a dielectric constant of at least 4 and a thickness across the E-field ranging between 0.01 and 0.25 guide wavelengths at the center frequency of the given range. Appropriate thicknesses for a dielectric member having a given dielectric constant can be selected to provide overcompensation. The series connection of appropriate lengths of an overcompensated waveguide and uncompensated waveguide yield an overall waveguide having a substantially dispersionless characteristic.
    Type: Grant
    Filed: December 17, 1981
    Date of Patent: July 3, 1984
    Assignee: RCA Corporation
    Inventors: Norman R. Landry, Leonard H. Yorinks
  • Patent number: 4365215
    Abstract: The power handling capacity of a matched coaxial transmission line power divider is increased with a minimum increase in losses by mounting the isolation resistor(s) within the dielectric volume of the coaxial transmission line and on an electrically-insulating resistor contact portion of a thermally-conducting heat sink. A low dielectric constant region is located between the resistor contact portion of the heat sink and the directly adjacent portion of the outer conductor of the coaxial transmission line.
    Type: Grant
    Filed: January 21, 1981
    Date of Patent: December 21, 1982
    Assignee: RCA Corporation
    Inventor: Norman R. Landry
  • Patent number: 4349790
    Abstract: A coaxial transmission line is coupled to a dielectrically loaded rectangular waveguide by an E-plane probe which extends through a broad wall of the waveguide and into a slot in the body of loading dielectric. The slot and probe are positioned substantially laterally off-center in the body of dielectric material.
    Type: Grant
    Filed: April 17, 1981
    Date of Patent: September 14, 1982
    Assignee: RCA Corporation
    Inventor: Norman R. Landry
  • Patent number: 4338609
    Abstract: Substantial weight reduction and size reduction in phased array radiators are obtained by coupling a dielectrically loaded waveguide directly to a short horn radiator whose electrical length is less than one half wavelength at an operating frequency. Coupling is obtained by positioning the waveguide with its end in the interior of the short horn radiator and by causing the dielectric material of the waveguide to protrude beyond the end of the waveguide and to terminate inside the horn.
    Type: Grant
    Filed: December 15, 1980
    Date of Patent: July 6, 1982
    Assignee: RCA Corporation
    Inventor: Norman R. Landry
  • Patent number: 4245210
    Abstract: A thick film resistor element capable of dissipating relatively large amounts of microwave energy comprises several distinct layers of resistive material overlying an electrically insulating thermally conducting substrate. The final dimensions of the element can be made comparatively small with respect to a conventional element having comparable dissipation capability. The element has a coating of a crossover dielectric material which provides a moisture barrier between the element and the ambient.
    Type: Grant
    Filed: March 19, 1979
    Date of Patent: January 13, 1981
    Assignee: RCA Corporation
    Inventors: Norman R. Landry, Samuel L. Williams, Robert L. Schelhorn
  • Patent number: 4138683
    Abstract: The rear wall of a horn antenna is a substrate with a phase shifter circuit thereon. Power from the phase shifter is radiated by the horn via a probe that has the general shape of a hook.
    Type: Grant
    Filed: July 21, 1977
    Date of Patent: February 6, 1979
    Assignee: RCA Corporation
    Inventors: Willard T. Patton, Norman R. Landry