×

Antenna apparatus and communication method employing it

  • US 7,336,234 B2
  • Filed: 12/23/2005
  • Issued: 02/26/2008
  • Est. Priority Date: 12/28/2004
  • Status: Expired due to Fees
First Claim
Patent Images

1. An antenna apparatus comprising:

  • a monopole antenna forming an antenna element having a metal shell body,a reflecting plate disposed between a power supply part and the antenna element and not connected to the antenna element such that the reflecting plate covers and shields the power supply part side of the antenna element, wherein;

    said antenna element has an approximately conical part, a vertex of which is on the side of a power supply part;

    said antenna apparatus is disposed in a vehicle cabin for receiving radio waves from a transmitter mounted in a wheel;

    said transmitter comprises respective transmitters mounted in respective wheels; and

    said antenna apparatus is disposed at a position of a vehicle body roof part approximately equidistant from the respective wheels in such a manner that a head part of the antenna element faces vertically downward.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×