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This work presents an integrated multifunction antenna based on new traveling-wave (TW) antenna technologies that can handle multiple terrestrial and satellite communications on mobile platforms. The terrestrial omnidirectional part of the antenna has been demonstrated to have an ultrawide bandwidth over 100:1, with feasibility of 1000:1 or more. The antenna is miniaturized and low-cost, thus attractive for applications on automobiles and other small platforms. The basic design configurations and their measured performance, as well as details on a breadboard model covering terrestrial communications and GPS L1, are discussed.