Antenna for reception of circularly polarized satellite radio signals

An antenna for the reception of circularly polarized satellite radio signals comprising at least one substantially horizontally oriented conductor loop arranged above a conductive ground surface, having an assembly connected to an antenna terminal for electromagnetic excitation of the conductor loop,

• wherein the conductor loop is designed as a ring circuit emitter and forms a resonance structure and is electrically excitable by electromagnetic excitation in such a way that on the ring circuit with a developed length L the current distribution of a continuous transverse electromagnetic wave occurs in a single direction of rotation, the phase difference of which is exactly 2π over one revolution,
• wherein for assistance of the vertically oriented portions of the electromagnetic field, at the circumference of the ring circuit emitter there is at least one vertical emitter running to the conductive ground surface, which vertical emitter is electromagnetically coupled both to the ring circuit emitter and to the electrically conductive ground surface,
• wherein the ring circuit emitter is formed by a substantially square, closed circuit ring having an edge length of substantially λ/4 in a substantially horizontal plane at height h above the conductive ground surface,
• wherein to generate a continuous transverse electromagnetic wave on the ring circuit emitter and for contactless coupling to the ring circuit emitter either a ramp-like directional coupling conductor is provided, which, starting from the antenna terminal which is located on the conductive ground surface via the vertical emitter as far as a coupling distance, leads to one of the corners of the ring circuit emitter, from there coincides with the ground surface approximately below an adjacent corner substantially in a ramp function and is conductively connected to the ground surface via an earth terminal point, and
• wherein a ramp-like directional coupling conductor is provided, which, starting from an antenna terminal which is located on the conductive ground surface via the vertical emitter as far as a coupling distance, leads to one of the corners of the ring circuit emitter, from there coincides with the ground surface approximately below an adjacent corner substantially in a ramp function and is conductively connected to the ground surface via an earth terminal point.