In present-day vehicles a multitude of high frequency services are offered. These services need antennas which often must be placed very close to each other. This is the case with roof antennas that operate in different frequency ranges for GSM, UMTS, GPS and SDARS applications [1, 2]. The development of such antenna systems poses a new challenge due to the fact that more antennas shall occupy the same place reserved for the existent systems as the exterior design should stay the same. This will be the case with the additional integrated LTE, WIMAX and Car-2-X antennas.     «

In present-day vehicles a multitude of high frequency services are offered. These services need antennas which often must be placed very close to each other. This is the case with roof antennas that operate in different frequency ranges for GSM, UMTS, GPS and SDARS applications [1, 2]. The development of such antenna systems poses a new challenge due to the fact that more antennas shall occupy the same place reserved for the existent systems as the exterior design should stay the same. This will...     »