Antenna for reception of circularly polarized satellite radio signals

摘要

An antenna for receiving circularly polarized satellite radio signals has a conductive base surface and at least one a conductor loop oriented horizontally above the base surface by a height h. The conductor loop is configured as a polygonal or circular closed ring line radiator. The ring line radiator forms a resonant structure that is electrically excited so that the current distribution of a running line wave in a single rotation direction occurs on the ring line, wherein the phase difference of which, over one revolution, amounts to essentially 2π. A vertical radiator extends between the conductive base surface and the circumference of the ring line radiator. The height h is smaller than ⅕ of the free-space wavelength λ.

主权项

1. An antenna for the reception of circularly polarized satellite radio signals comprising at least one substantially horizontally oriented conductor loop disposed above a conductive ground surface, having an assembly connected to an antenna terminal for electromagnetic excitation of the conductor loop,
wherein the conductor loop comprises a ring circuit emitter, running by a polygonal or circular closed ring circuit in a substantially horizontal plane at a height h above the conductive ground surface, wherein the ring circuit emitter forms a resonance structure and is electrically excitable by electromagnetic excitation in such a way that on the ring circuit 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 at the circumference of the ring circuit emitter there are vertical emitters electromagnetically coupled to the ring circuit emitter at ring circuit coupling points and running to the conductive ground surface, wherein an emitter is electromagnetically coupled to the electrically conductive ground surface and an emitter is coupled at its lower end to the antenna terminal, wherein for assistance of the vertically oriented portions of the electromagnetic field, there is at least one vertical emitter electromagnetically coupled to the ring circuit emitter and running to the electrically conductive ground surface, which vertical emitter is electromagnetically coupled to the electrically conductive ground surface, and wherein around the center of the ring circuit emitter there is a further ring circuit emitter with the same center, which is designed in such a way that its resonance is equal to that of the ring circuit emitter, which however, in departure therefrom, is electrically excitable in such a way that the phase difference of the transverse electromagnetic wave which is propagated on the ring circuit thereof in a single direction of rotation is exactly N*2π over one revolution, where N>1 is a whole number, and on the received signals of which the received signals of the ring circuit emitter are superimposed in a summation and selection network to form a directional antenna having a directional characteristic with a selectable main direction.