High frequency antenna for the window glass of an automobile

摘要

A high frequency wave glass antenna (100,200,300,400) for an automobile includes an antenna conductor (1) formed in a loop shape and disposed in or an automobile window glass sheet (12), the antenna conductor having a discontinuity and feeding portions (4) at both ends of the discontinuity or in the vicinity of said both ends, the discontinuity being formed of a portion of the loop shape cut by a length. The antenna conductor includes a detour (2) in a portion of the loop shape, the detour being formed of a single or a plurality of detour elements, the detour being disposed in a position, which satisfies that a rate of a distance from a center (P1) of the discontinuity of the original loop shape to a center (P2) of the detour of the original loop shape with respect to a length of an inner peripheral edge or an outer peripheral edge of the original loop shape ranges from 0.18 to 0.4.