A directional antenna for the reception of circularly polarized satellite radio signals, comprising a horizontally oriented conductor loop arranged above a conductive base surface and an arrangement connected to an antenna connector for the electromagnetic excitation of the conductor loop, comprising the following features: - the conductor loop is configured as a ring line radiator extending through a polygonal or circular closed ring line in a horizontal plane at a height h above the conductive base surface; - the ring line radiator forms a resonant structure and can be electrically excited by the arrangement for electromagnetic excitation such that the current distribution of a running line wave in a single rotation direction is adopted on the ring line, the phase difference of which line wave, over one revolution, amounts to just 2π, characterized in that - at least one vertical radiator which is electromagnetically coupled to the ring line radiator and which runs toward the electrically conductive base surface is disposed at the periphery of the ring line radiator and is electromagnetically coupled with the electrically conductive base surface, wherein - a further ring line radiator is present about the center of the ring line radiator and has the same center, said further ring line radiator being configured such that its resonance is the same as that of the ring line radiator and being electrically excitable in a manner such that the phase difference of the line wave propagating on its ring line in a single rotation direction amounts over one rotation to just N*2π with a whole-number N>1, and its reception signals are superimposed with the reception signals of the ring line radiator via a controllable phase rotation element in a summation and selection network to configure a directional antenna having a directional characteristic with a selectable main direction. - the conductor loop is configured as a ring line radiator extending through a polygonal or circular closed ring line in a horizontal plane at a height h above the conductive base surface; - the ring line radiator forms a resonant structure and can be electrically excited by the arrangement for electromagnetic excitation such that the current distribution of a running line wave in a single rotation direction is adopted on the ring line, the phase difference of which line wave, over one revolution, amounts to just 2π, - at least one vertical radiator which is electromagnetically coupled to the ring line radiator and which runs toward the electrically conductive base surface is disposed at the periphery of the ring line radiator and is electromagnetically coupled with the electrically conductive base surface, wherein - a further ring line radiator is present about the center of the ring line radiator and has the same center, said further ring line radiator being configured such that its resonance is the same as that of the ring line radiator and being electrically excitable in a manner such that the phase difference of the line wave propagating on its ring line in a single rotation direction amounts over one rotation to just N*2π with a whole-number N>1, and its reception signals are superimposed with the reception signals of the ring line radiator via a controllable phase rotation element in a summation and selection network to configure a directional antenna having a directional characteristic with a selectable main direction.