Wideband antenna operable for multiple telecommunications standards arranged on vehicle

An antenna module for mounting on a vehicle, the antenna module comprising:

• 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 operating 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 structure with a dielectric substrate disposed between the second radiator structure and the third radiator structure and operating 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,
• wherein in the first frequency band, the first radiator structure generates a first electric field distribution from the top conductive pattern and the first and second side conductive patterns, and the second radiator structure generates a second electric field distribution from the connected conductive patterns of the helical structure formed on the second side surface of the second radiator structure to generate the first frequency band,
• wherein in the second frequency band, the second radiator structure generates third electric field distributions of the connected 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, and
• wherein the plurality of connected conductive patterns of the second radiator structure comprise:
• a first conductive pattern on the second side surface and connected to the top conductive pattern and forming an upper branch;
• a second conductive pattern connected to the first conductive pattern and having a bent portion on the second side surface;
• a third conductive pattern connected to the second conductive pattern;
• a fourth conductive pattern on the second side surface and connected to the third conductive pattern, and having a bent portion disposed on the dielectric substrate and forming a lower branch;
• and
• a fifth conductive pattern extending from one side of the fourth conductive pattern on the second side surface and bent onto the first side surface.