Patents by Inventor Cyril M. Kaloi

Cyril M. Kaloi 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: 5389937
    Abstract: The microstrip antenna system uses a special wedge shaped feed connected m the antenna radiation element to the center pin of the coaxial to microstrip adapter to obtain wide bandwidth operation. The special wedge feed connects the center pin to an indefinite series of feedpoints along the length of radiating element. The angle of the taper of the wedge feed along with the distance between the bottom of the wedge and the ground plane provides impedance matching for the antenna.
    Type: Grant
    Filed: May 1, 1984
    Date of Patent: February 14, 1995
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Cyril M. Kaloi
  • Patent number: 4415900
    Abstract: A microstrip backfire antenna configuration combining the microstrip type tenna element with a waveguide cavity which provides control over the radiation pattern and obviates the need for a more expensive phased array antenna system; the microstrip element is placed in a waveguide cavity so as to excite both the microstrip element and the waveguide cavity in a predetermined manner.
    Type: Grant
    Filed: December 28, 1981
    Date of Patent: November 15, 1983
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Cyril M. Kaloi
  • Patent number: 4401988
    Abstract: A coupled multilayer microstrip antenna having an upper and a lower microip element tuned to the same frequency, and separated from each other by a dielectric substrate. The pair of elements is located over a suitable ground plane and separated from the ground plane by a second dielectric substrate. The upper element is the driven element which is directly coupled to the feed line while the lower element is parasitically coupled to upper element. The lower element cancels the image field as seen by the upper element providing enhanced radiation at angles closer to the ground plane.
    Type: Grant
    Filed: August 28, 1981
    Date of Patent: August 30, 1983
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Cyril M. Kaloi
  • Patent number: 4370657
    Abstract: A microstrip antenna having a plurality of different radiating elements sed apart in an end-to-end arrangement, above a ground plane and separated therefrom by a dielectric substrate; only one element is fed at its feedpoint, and energy emanating from the fed element is primarily coupled at one end to parasitic element(s) by the electric field generated in the fed element. The radiating pattern is determined by the phase relationship and amplitude distribution between the excited fed element and the parasitic element(s).
    Type: Grant
    Filed: March 9, 1981
    Date of Patent: January 25, 1983
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Cyril M. Kaloi
  • Patent number: 4356492
    Abstract: A multi-band microstrip antenna comprising a plurality of separate radiat elements which operate at widely separated frequencies from a single common input point. The common input point is fed at all the desired frequencies from a single transmission feed line. A variety of combinations of microstrip elements can be used. The individual radiating elements are each made to look substantially like an open circuit to all other frequencies but the respective frequency at which they are to operate by respective feed point location and dimensioning of the transmission lines from the common input point to the feed points of the separate elements.
    Type: Grant
    Filed: January 26, 1981
    Date of Patent: October 26, 1982
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Cyril M. Kaloi
  • Patent number: 4347517
    Abstract: A microstrip backfire antenna which combines the microstrip type antenna ment with a backfire cavity to provide more than three times the gain over a single microstrip element and thereby be capable of replacing four or more elements of a conventional microstrip array. The microstrip backfire antenna consists of a microstrip element in a cavity between a total reflector and a partial reflector and is characterized by multiple reflections of electromagnetic waves between the two reflectors and by energy being radiated normal to and through the partial reflector.
    Type: Grant
    Filed: January 26, 1981
    Date of Patent: August 31, 1982
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Cyril M. Kaloi
  • Patent number: 4326203
    Abstract: A corner fed electric microstrip dipole antenna consisting of a thin eleccally conducting, four-sided non-rectangular shaped radiating element having two opposite sides parallel formed on one surface of a dielectric substrate, the ground plane being on the opposite surface. The feed point is located at one corner of the antenna element and the input impedance is matched with a matching microstrip transmission feed line connected to the corner of the antenna. The length of the radiating element determines the resonant frequency along the Y axis (i.e., length dimension) and the width determines the resonant frequency along the Z axis (i.e., width dimension). This antenna is capable of generating linear, elliptical and circular polarized radiation using a single element and single feed point.
    Type: Grant
    Filed: September 26, 1979
    Date of Patent: April 20, 1982
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Cyril M. Kaloi
  • Patent number: 4291311
    Abstract: Microstrip antenna systems having two ground planes spaced apart by a dietric substrate and radiating elements coplanar with one of the two ground planes, or sandwiched within the dielectric substrate separating the two ground planes adjacent a window in one of the ground planes. The two ground planes are shorted together in most instances, and the dual ground plane system provides a reduction in the leakage losses of tranmission lines feeding and/or interconnecting the microstrip antenna radiating elements. The dual ground plane system also provides a reduction in coupling between arrayed radiation elements as well as an increase in bandwidth, in some instances.
    Type: Grant
    Filed: August 23, 1979
    Date of Patent: September 22, 1981
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Cyril M. Kaloi
  • Patent number: 4291312
    Abstract: Microstrip antenna systems having two ground planes spaced apart by a dietric substrate and radiating elements coplanar with one of the two ground planes, or sandwiched within the dielectric substrate separating the two ground planes adjacent a window in one of the ground planes. The two ground planes are shorted together in most instances, and the dual ground plane system provides a reduction in the leakage losses of transmission lines feeding and/or interconnecting the microstrip antenna radiating elements. The dual ground plane system also provides a reduction in coupling between arrayed radiation elements as well as an increase in bandwidth, in some instances.
    Type: Grant
    Filed: August 23, 1979
    Date of Patent: September 22, 1981
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Cyril M. Kaloi
  • Patent number: 4197544
    Abstract: Microstrip antenna systems having two ground planes spaced apart by a dietric substrate and radiating elements coplanar with one of the two ground planes, or sandwiched within the dielectric substrate separating the two ground planes adjacent a window in one of the ground planes. The two ground planes are shorted together in most instances, and the dual ground plane system provides a reduction in the leakage losses of transmission lines feeding and/or interconnecting the microstrip antenna radiating elements. The dual ground plane system also provides a reduction in coupling between arrayed radiation elements as well as an increase in bandwidth, in some instances.
    Type: Grant
    Filed: September 28, 1977
    Date of Patent: April 8, 1980
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Cyril M. Kaloi
  • Patent number: 4170012
    Abstract: A corner fed electric microstrip dipole antenna consisting of a thin eleccally conducting, rectangular shaped radiating element formed on one surface of a dielectric substrate, the ground plane being on the opposite surface. The feed point is located at one corner of the antenna element and the input impedance is matched with a matching microstrip transmission feed line connected to the corner of the antenna. The length of the radiating element is greater than the width and determines the resonant frequency along the Y axis (i.e., length dimension) and the width determines the resonant frequency along the Z axis (i.e., width dimension). This antenna is capable of generating linear polarized radiation along the length thereof with minimal cross-polarization when the radiating element width dimension approaches one-quarter waveguide wavelength and less using a single corner fed element and single feed point. Elliptical polarization is also available with the rectangular radiating element.
    Type: Grant
    Filed: June 26, 1978
    Date of Patent: October 2, 1979
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Cyril M. Kaloi
  • Patent number: 4163236
    Abstract: A corner fed electric microstrip dipole antenna consisting of a thin eleccally conducting, square shaped radiating element formed on one surface of a dielectric substrate, the ground plane being on the opposite surface. The feed point is located at one corner of the antenna element and the input impedance is matched with a matching microstrip transmission feed line connected to the corner of the antenna. The sides of the radiating element are all equal. The length of the element determines the resonant frequency along the Y axis and the width determines the resonant frequency along the Z axis. This antenna is capable of generating elliptical and circular polarized radiation when reactively loaded using a single element and single feed point.
    Type: Grant
    Filed: July 3, 1978
    Date of Patent: July 31, 1979
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Cyril M. Kaloi
  • Patent number: 4157548
    Abstract: Twin electric microstrip dipole antennas consisting of thin electrically ducting rectangular shape elements formed on both sides of a dielectric substrate. In these antennas the element on one side of the substrate is the mirror image of the element on the other side of the substrate. Each of the elements act, in effect, as a ground plane for the other. The thickness of the substrate to a large extent determines the bandwidth of the antenna and the length of the conducting elements on both sides of the substrate determines the resonant frequency.
    Type: Grant
    Filed: October 31, 1977
    Date of Patent: June 5, 1979
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Cyril M. Kaloi
  • Patent number: 4155089
    Abstract: Twin electric microstrip dipole antennas consisting of thin electrically ducting rectangular shape elements formed on both sides of a dielectric substrate. In these antennas the element on one side of the substrate is the mirror image of the element on the other side of the substrate. Each of the elements act, in effect, as a ground plane for the other. The thickness of the substrate to a large extent determines the bandwidth of the antenna and the length of the conducting elements on both sides of the substrate determines the resonant frequency.
    Type: Grant
    Filed: October 31, 1977
    Date of Patent: May 15, 1979
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Cyril M. Kaloi
  • Patent number: 4151532
    Abstract: Twin electric microstrip dipole antennas consisting of thin electrically ducting rectangular shape elements formed on both sides of a dielectric substrate. In these antennas the element on one side of the substrate is the mirror image of the element on the other side of the substrate. Each of the elements act, in effect, as a ground plane for the other. The thickness of the substrate to a large extent determines the bandwidth of the antenna and the length of the conducting elements on both sides of the substrate determines the resonant frequency.
    Type: Grant
    Filed: October 31, 1977
    Date of Patent: April 24, 1979
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Cyril M. Kaloi
  • Patent number: 4151530
    Abstract: Twin electric microstrip dipole antennas consisting of thin electrically ducting rectangular shape elements formed on both sides of a dielectric substrate. In these antennas the element on one side of the substrate is the mirror image of the element on the other side of the substrate. Each of the elements act, in effect, as a ground plane for the other. The thickness of the substrate to a large extent determines the bandwidth of the antenna and the length of the conducting elements on both sides of the substrate determines the resonant frequency.
    Type: Grant
    Filed: October 31, 1977
    Date of Patent: April 24, 1979
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Cyril M. Kaloi
  • Patent number: 4151531
    Abstract: Twin electric microstrip dipole antennas consisting of thin electrically ducting rectangular shape elements formed on both sides of a dielectric substrate. In these antennas the element on one side of the substrate is the mirror image of the element on the other side of the substrate. Each of the elements act, in effect as a ground plane for the other. The thickness of the substrate to a large extent determines the bandwidth of the antenna and the length of the conducting elements on both sides of the substrate determines the resonant frequency.
    Type: Grant
    Filed: October 31, 1977
    Date of Patent: April 24, 1979
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Cyril M. Kaloi
  • Patent number: 4125839
    Abstract: Circularly polarized microstrip antennas consisting of thin electrically ducting, square-shaped radiating elements formed on one surface of a dielectric substrate and having a ground plane on the opposite surface of the substrate. Two feed points are used to provide a circular polarized radiation pattern. The feed points are located along the centerlines of the antenna length and width or along the diagonal lines of the element and the input impedances can be varied by moving the feed points along both centerlines or both diagonal lines from the centerpoint of the element. The antennas can be notched in from the edges of the radiating element along the centerlines of the element width and length, or along opposite diagonal lines of the element, to the optimum input impedance match feed point.
    Type: Grant
    Filed: October 6, 1977
    Date of Patent: November 14, 1978
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Cyril M. Kaloi
  • Patent number: 4125838
    Abstract: Circularly polarized microstrip antennas consisting of thin electrically ducting, square-shaped radiating elements formed on one surface of a dielectric substrate and having a ground plane on the opposite surface of the substrate. Two feed points are used to provide a circular polarized radiation pattern. The feed points are located along the centerlines of the antenna length and width or along the diagonal lines of the element and the input impedances can be varied by moving the feed points along both centerlines or both diagonal lines from the centerpoint of the element. The antennas can be notched in from the edges of the radiating element along the centerlines of the element width and length, or along opposite diagonal lines of the element, to the optimum input impedance match feed point.
    Type: Grant
    Filed: October 6, 1977
    Date of Patent: November 14, 1978
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Cyril M. Kaloi
  • Patent number: 4125837
    Abstract: Circularly polarized microstrip antennas consisting of thin electrically ducting, square-shaped radiating elements formed on one surface of a dielectric substrate and having a ground plane on the opposite surface of the substrate. Two feed points are used to provide a circular polarized radiation pattern. The feed points are located along the centerlines of the antenna length and width or along the diagonal lines of the element and the input impedances can be varied by moving the feed points along both centerlines or both diagonal lines from the centerpoint of the element. The antennas can be notched in from the edges of the radiating element along the centerlines of the element width and length, or along opposite diagonal lines of the element, to the optimum input impedance match feed point.
    Type: Grant
    Filed: October 6, 1977
    Date of Patent: November 14, 1978
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Cyril M. Kaloi