4m Company

Jae Il Sim

Jin Kyu Hwang

Se Young Park

Sang Pil Kang

A multi-band shark fin antenna for a vehicle comprises: a base; a substrate coupled to an upper portion of the base and on which feed lines are formed; and a first antenna frame coupled on the substrate and to which a plurality of radiators are coupled, wherein the first antenna frame comprises: a first radiator coupling part to which a first radiator is coupled; and a first support extending from the first radiator coupling part and supporting the first radiator coupling part, wherein an antenna coil is coupled to an outer circumferential surface of the first support, and the antenna coil is electrically connected to the first radiator.

Multi band shark fin antenna for vehicle

Disclosed is a column reinforcing structure using V-shaped tie bars, in which V-shaped tie bars and reinforcing tie bars are used together in a pre-assembled reinforcement when reinforcing an existing column by concrete jacketing such that it is possible to effectively confine the concrete while preventing buckling of main reinforcing bars without installing cross ties and construction can be carried out very quickly and simply.

Growing community of inventors

Incheon, South Korea

Jae Il Sim