A ultra wideband monopole antenna and the antenna for vehicles and the transmitter-receiver of a radio signal using thereof

摘要

PURPOSE: An ultra wideband monopole antenna, an antenna for a vehicle using the same, and a portable wireless transceiver terminal are provided to reduce the length and weight of the antenna by forming a folded feeding surface on a substrate. CONSTITUTION: An ultra wideband monopole antenna includes a substrate(110), a ground surface(120), and a feeding surface(130). The ground surface is formed on one side of the substrate. The feeding surface is folded to be electrically isolated from the ground surface. A plurality of resistors(140) are arranged between the end and the folded part of the feeding surface. A first input terminal of a junction circuit is electrically connected to a central conductive line of a coaxial cable. The first output terminal of the junction circuit is electrically connected to the feeding surface.