Automotive antennas for reception of terrestrial broadcasting services have experienced significant advancements in recent years. Short multiband antennas as well as small multi-antenna modules on the car roof are the common solution for rather low-end vehicles. However, car manufacturers increasingly tend to hide their receiving antennas within dielectric parts of the traditionally metallic car body. In this case, multi-antenna diversity configurations are generally employed in order to compensate for the shadowing effect of the metallic components immediately enclosing the concealed antenna structures. For both types of these critical car antennas mentioned above, the effective High-Impedance Amplifier concept offers a generic and easy implementable interface. Throughout this thesis a variety of active automotive antennas for the reception of AM, FM, DAB, and DVB-T broadcasting services are considered. For all investigated visibly mounted car antennas, such as ultra-short helical roof antennas, as well as hidden multi-antenna diversity systems, for example embedded into the windscreen, the differently-sized side screens or integrated into a polymeric roof cutout of the vehicle, the respectively optimized High-Impedance Amplifier circuits have successfully proven their worth. Their higher independence from the corresponding car antennas under test offers major performance improvements in comparison to a conventional 50 Ohm amplifier concept.    «

Automotive antennas for reception of terrestrial broadcasting services have experienced significant advancements in recent years. Short multiband antennas as well as small multi-antenna modules on the car roof are the common solution for rather low-end vehicles. However, car manufacturers increasingly tend to hide their receiving antennas within dielectric parts of the traditionally metallic car body. In this case, multi-antenna diversity configurations are generally employed in order to compens...    »