Abstract: A roof antenna for a vehicle has a cover that is connected to a baseplate via a latching unit. The latching unit comprises latching hooks that releasably engage behind elastic latching lugs.

Abstract: An antenna arrangement for the reception of circularly polarized satellite radio signals having a free space wavelength ? and a frequency f comprises at least one circularly polarized satellite reception antenna positioned above an electrically conductive base surface whose outline is inscribed by a circle K about its phase center PZ having a relative antenna radius ra/?<0.15. A director is present that comprises a horizontal electrical conductor that has two conductor ends and that is guided over a director length Ld at a director height hd above the conductive base surface. The horizontal electrical conductor is angled at its two conductor ends and extends from there as vertical conductor in each case toward the conductive base surface.

Abstract: In an antenna array for receiving circularly polarized satellite radio signals, an antenna structure that includes a closed-loop radiator is placed in a plastic protective antenna cover and is secured therein in an interlocking manner.

Abstract: A closed-loop radiator for receiving circularly polarized satellite radio signals underneath a shell-type protective antenna cover made of dielectric plastic comprises a closed-loop conductor and vertical radiators that are connected thereto; the closed-loop conductor and the vertical radiators are applied as a coating to the inner surface of the protective antenna cover and form an electrically conducting, interconnected antenna structure.

Abstract: An antenna device for a vehicle for a vehicle serves for a vehicle transceiver device whose transmission power level regulation device is configured in a manner such that, during the bidirectional communication, the transmission power level is set as larger as the quality of the communication link falls and is conversely lowered as the transmission quality of the communication link increases.

Abstract: An antenna for the reception of circularly polarized satellite radio signals comprises a conductor loop that is arranged above a conductive base surface and that is configured as a ring line radiator that forms a resonant structure. Vertical radiators extending toward the conductive base surface are present at the periphery of the ring line radiator, with the excitation of the conductor loop taking place via one of the radiators as an active radiator. A specific number of passive vertical radiators galvanically coupled to the ring line radiator is furthermore provided.

Abstract: The invention relates to a vertical broadband monopole antenna for vehicles, for two frequency bands separated by a frequency gap, said antenna having a first capacity top and a further capacity top, which is capacitively coupled to the first capacity top, wherein the further capacity top has at least one inductive high-resistance conductive strip, which extends to a conductive ground surface and is conductively connected thereto at its lower end.