초록 ▼

The present invention provides a vehicle antenna system including high frequency pickup type antennas concealed within the vehicle body for receiving broadcast waves. The high frequency pickups are arranged on the vehicle body at locations spaced apart from one another, that is, at least one adjacen

The present invention provides a vehicle antenna system including high frequency pickup type antennas concealed within the vehicle body for receiving broadcast waves. The high frequency pickups are arranged on the vehicle body at locations spaced apart from one another, that is, at least one adjacent to the vehicle roof and the other on a trunk hinge. The antenna system also includes a diversity circuit for automatically selecting one of the high frequency pickups which is in its optimum state of reception. Each of the high frequency pickups is disposed near the marginal portion of the vehicle body such that surface high frequency currents concentratedly induced on the marginal portion of the vehicle body can be detected by the high frequency pickup. Each of the high frequency pickups includes a loop antenna or electrostatic electrode disposed near the marginal portion of the vehicle body.

대표청구항 ▼

A diversity type vehicle antenna system for detecting broadcast waves, comprising: first high frequency pickup means including a loop antenna mounted adjacent and in close proximity to a marginal edge portion of a vehicle roof of the vehicle body for electromagnetically detecting a magnetic flux for

A diversity type vehicle antenna system for detecting broadcast waves, comprising: first high frequency pickup means including a loop antenna mounted adjacent and in close proximity to a marginal edge portion of a vehicle roof of the vehicle body for electromagnetically detecting a magnetic flux formed by surface high-frequency currents flowing on the vehicle roof induced by the broadcast waves; second high frequency pickup means including a loop antenna rigidly mounted on and along a trunk hinge of the vehicle body, said loop antenna being adapted to electromagnetically detect a magnetic flux formed by surface high-frequency currents flowing on the trunk hinge induced by the broadcast waves; and pickup selection means for switchably selecting an output from any one of said first and second high-frequency pickup means, said pickup selection means comparing the selected output to a predetermined threshold limit and switching to the other output of said first and second high frequency pickup means when the selected output is lower than the predetermined threshold.