Patents by Inventor Yew S. Tay

Yew S. Tay 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).

  • Broadband end fed dipole antenna with a double resonant transformer
    Patent number: 5563615
    Abstract: An antenna comprises a feed port, a 1/2 wavelength radiator (20), and a double resonant transformer (10). The feed, port, having a signal feed portion (34) and a ground portion (44), is at a low impedance while the 1/2 wavelength radiator (20) has opposed high impedance ends (21 and 22). For transforming low impedance to high impedance, at two resonant frequencies, the double resonant transformer is coupled between the feed port and the 1/2 wavelength radiator.
    Type: Grant
    Filed: April 3, 1995
    Date of Patent: October 8, 1996
    Assignee: Motorola, Inc.
    Inventors: Yew S. Tay, Danny O. McCoy, Quirino Balzano
  • Folded dipole antenna
    Patent number: 5317326
    Abstract: A modified folded dipole antenna (20) comprises a central feeder (23), first and second portions (38 and 40) coupled to the feeder. The first and second portions have first and second folded ends (42 and 44). The folded ends are in close proximity to each other and are electromagnetically coupled to each other. Thus, a modified folded dipole antenna is formed which receives and/or transmits radio signals in at orthogonal orientations.
    Type: Grant
    Filed: January 15, 1993
    Date of Patent: May 31, 1994
    Assignee: Motorola, Inc.
    Inventors: Yew S. Tay, Oscar Garay, Jose A. Llorente
  • Sleeved monopole antenna
    Patent number: 5231412
    Abstract: An antenna (100) includes a quarter-wave monopole radiating element (110, 110') having a signal feed point end (110A). The antenna (100) further includes a reactive element (150) in the form of a conductive sleeve. The sleeve (150) includes a grounding end (150A) and is coaxially positioned around a portion of the monopole radiating element (110, 110'). A spacer (140) is coaxially situated between the monopole radiating element (110, 110') and the reactive element (150), for electrically insulating the monopole radiating element (110, 110') from the reactive element (150). The spacer (140) is sufficiently dimensioned such that the monopole radiating element is tightly coupled to the reactive element (150) at substantially around the feed point end (150A).
    Type: Grant
    Filed: October 18, 1991
    Date of Patent: July 27, 1993
    Assignee: Motorola, Inc.
    Inventors: John E. Eberhardt, Oscar M. Garay, Yew S. Tay