Antenna apparatus

Information

  • Patent Application
  • 20070229361
  • Publication Number
    20070229361
  • Date Filed
    October 20, 2006
    18 years ago
  • Date Published
    October 04, 2007
    17 years ago
Abstract
An antenna apparatus is disclosed that includes a dielectric substrate, an antenna element pattern that is formed on an upper face of the dielectric substrate, a strip line that is formed on the upper face of the dielectric substrate and extends from the antenna element pattern, and a ground pattern that is formed on the upper face of the dielectric substrate and is arranged on either side of the strip line. The strip line, the ground pattern, and the substrate form a coplanar microwave transmission line.
Description

BRIEF DESCRIPTION OF THE DRAWINGS


FIGS. 1A and 1B are diagrams showing examples of conventional antenna apparatuses;



FIGS. 2A and 2B are diagrams showing the structure of a UWB planar antenna apparatus;



FIGS. 3A-3C are diagrams showing data for designing a microstrip line having an impedance of 50Ω;



FIGS. 4A and 4B are perspective views of a UWB planar antenna apparatus according to a first embodiment of the present invention;



FIGS. 5A-5C are diagrams showing the structure of the UWB planar antenna apparatus of the first embodiment;



FIG. 6 is a graph showing a VSWR-frequency relationship of the UWB planar antenna apparatus of the first embodiment;



FIGS. 7A-7C are diagrams showing data for designing a coplanar strip line having an impedance of 50Ω;



FIGS. 8A and 8B are perspective views of a UWB planar antenna apparatus according to a second embodiment of the present invention;



FIGS. 9A-9C are diagrams showing the structure of the UWB planar antenna apparatus of the second embodiment; and



FIGS. 10A-10C are diagrams showing a socket coaxial connector used in the UWB planar antenna apparatus of the second embodiment.


Claims
  • 1. An antenna apparatus comprising: an antenna element pattern;a ground pattern that is arranged opposite the antenna element pattern; anda coplanar microwave transmission line that extends from the antenna element pattern.
  • 2. An antenna apparatus comprising: a dielectric substrate;an antenna element pattern that is formed on an upper face of the dielectric substrate;a strip line that is formed on the upper face of the dielectric substrate and extends from the antenna element pattern; anda ground pattern that is formed on the upper face of the dielectric substrate and is arranged on either side of the strip line;wherein the strip line, the ground pattern, and the substrate form a coplanar microwave transmission line.
  • 3. The antenna apparatus as claimed in claim 2, further comprising: a coaxial connector that is fixed to the substrate, the coaxial connector including a center conductor that is soldered to an end of the strip line the substrate.
  • 4. An antenna apparatus as claimed in claim 2, further comprising: a surface-mounted coaxial connector that is fixed to the substrate, the surface-mounted coaxial connector including a center conductor and a contact extending from the center conductor which contact is soldered to an end of the strip line.
Priority Claims (1)
Number Date Country Kind
2006-091602 Mar 2006 JP national