JP2006080999A5 - - Google Patents

Claims (11)

An antenna having a loop antenna for receiving radio waves, comprising a feeding point having a feeding terminal on the signal side and a feeding terminal on the ground side,
The antenna element of the loop antenna is disposed on a member made of a vehicle dielectric and in the vicinity of a conductor portion constituting the vehicle body of the vehicle,
The antenna, wherein the ground-side power supply terminal is connected to a receiver through which a radio wave received by the loop antenna is guided. The length in the direction along the conductor portion, antenna according to claim 1, I characterized in that it is formed longer than the length in the direction perpendicular to the conductor portion of the antenna element. 3. A parasitic element perpendicular to a line connecting a feeding point of the loop antenna and a substantially center of the loop antenna is arranged inside or outside the loop antenna. serial mounting of the antenna. The antenna element, antenna according to any one of claims 1 to 3, characterized in that it comprises a dielectric sheet formed in or on. The antenna according to claim 4, wherein the dielectric sheet is a transparent sheet-like film. A power supply circuit or an amplifier connected to the power supply point;
  The signal side power supply terminal is connected to a signal input / output side of the power supply circuit or amplifier, and the ground side power supply terminal is connected to a signal input / output side of the power supply circuit or amplifier. Item 6. The antenna according to any one of Items 1 to 5. The antenna according to claim 6, further comprising a balanced-unbalanced conversion circuit disposed between the feeding point and the feeding circuit or the amplifier. The antenna according to claim 4, further comprising another monopole antenna formed on the dielectric sheet. An antenna having a loop antenna for receiving radio waves at least;
  A cable connected to the loop antenna;
  A receiver through which the radio wave received by the loop antenna is guided via the cable;
  The antenna element of the loop antenna is arranged on a member made of a dielectric material of a vehicle and in the vicinity of a conductor portion constituting the vehicle body of the vehicle, and a feeding point of the antenna element is arranged close to the conductor portion. ,
  The antenna system, wherein the ground-side power supply terminal is connected to a receiver through which the radio wave received by the loop antenna is guided via the cable. An antenna having a feeding point having a feeding terminal on the signal side and a feeding terminal on the ground side, and having a loop antenna for receiving at least radio waves,
  The antenna, wherein the ground-side power supply terminal is connected to a receiver through which a radio wave received by the loop antenna is guided. An antenna having a loop antenna for receiving radio waves at least;
  A cable connected to the loop antenna;
  A receiver through which the radio wave received by the loop antenna is guided via the cable;
  The antenna system, wherein the ground-side power supply terminal is connected to the receiver via the cable.