Abstract: The antenna amplifier for mobile FM radio reception includes a signal amplifier, a controllable adjusting element having a PIN diode for impedance adaptation, and a control amplifier for regulating the adjusting element. The antenna amplifier has a compensation for the temperature response occurring as a result of very great differences (summer/winter) in ambient temperature, the PIN diode connection point is optimized, and the control range is maximized.

Abstract: The invention relates to a module (10) for exchanging radio data, particularly mobile radio data, comprising: transmitting/receiving electronics for processing mobile radio signals to be transmitted and/or received; shielding means (12) for electromagnetically shielding the transmitting/receiving electronics, and; a transmitting/receiving antenna (22) for transmitting and/or receiving mobile radio signals. The shielding means (12) have at least one electrically conductive shielding cover (12) that encapsulates the transmitting/receiving electronics. The transmitting/receiving antenna (22) is placed in the vicinity of the at least one shielding cover (12) so that the latter serves, at least in sections, as a ground surface during the transmission and/or reception of mobile radio signals.

Abstract: A slotted antenna can be used for operation in multiple frequency ranges. The slotted antenna has a first electrically conducting disc which is offset from an electrically conducting base area which forms a reference potential, the disc being connected at its outside edge to the base area by at least one first electrically conducting web. The first disc includes a recess. Above the recess, a second electrically conducting disc is situated and is connected at its outside edge to the first disc by at least one second electrically conducting web. An antenna conductor leads to the second disc.

Abstract: In the case of an antenna arrangement having an antenna situated in an automotive exterior mirror, a flat-design antenna structure is used, having a metal antenna bracket which is arranged opposite a ground plane designed as an electric counterweight, the antenna bracket being connected on one side to the ground plane and on the other side to the antenna signal and the antenna bracket forming a surface. Furthermore, the low-resistance metallic mirror layer of the mirror glass of the exterior mirror is subdivided into mutually electrically insulated segments by a grid structure, for example. The size of the segments is selected so that the mirror glass is permeable for the high-frequency antenna radiation.

Abstract: The antenna amplifier for mobile FM radio reception includes a signal amplifier, a controllable adjusting element having a PIN diode for impedance adaptation, and a control amplifier for regulating the adjusting element. The antenna amplifier has a compensation for the temperature response occurring as a result of very great differences (summer/winter) in ambient temperature, the PIN diode connection point is optimized, and the control range is maximized.

Abstract: The present invention relates to a half-loop antenna having an antenna half-loop positioned on top of a ground plane, the antenna half-loop forming an area whose outer edge forms a convex closed curve, that is, it is curved toward the outside. Preferably, the developed view of the conductor half-loop has the form of an ellipse tapering to a point at its ends, and at the feed-in point of the conductor half-loop an inductance can be inserted, formed as a spring.

Abstract: A slotted antenna can be used for operation in multiple frequency ranges. The slotted antenna has a first electrically conducting disc which is offset from an electrically conducting base area which forms a reference potential, the disc being connected at its outside edge to the base area by at least one first electrically conducting web. The first disc includes a recess. Above the recess, a second electrically conducting disc is situated and is connected at its outside edge to the first disc by at least one second electrically conducting web. An antenna conductor leads to the second disc.