Wideband antenna operable for multiple telecommunications standards arranged on vehicle

Abstract

An antenna module mounted on a vehicle, and including a first radiator structure including a top conductive pattern and first and second side conductive patterns extending from both end portions of the top conductive pattern; a second radiator structure connected to the top conductive pattern, including a plurality of connected conductive patterns and forming a helical structure having first to fourth side surfaces, and configured to operate in a second frequency band and a third frequency band that are higher than a first frequency band; and a third radiator structure including a conductive pattern spaced from the second radiator with a dielectric substrate disposed between the second radiator structure and the third radiator structure and configured to operate in a fourth frequency band higher than the third frequency band; and a feeder including a first feed line feeding a first signal to the first and second radiator structures, and including a second feed line feeding a second signal to the third radiator structure. Further, in the first frequency band, the first structure generates a first electric field distribution from the top conductive pattern and first and second side conductive patterns, and the second radiator structure generates a second electric field distribution from the conductive patterns of the helical structure formed on the second side surface of the second radiator structure to generate the first frequency band, and in the second frequency band, the second radiator structure generates third electric field distributions of the conductive patterns of the helical structure formed on the first side surface and the third side surface of the second radiator structure to generate the second frequency band.