Abstract: The present invention relates to a multi-input multi-output (MIMO) antenna with a multi-band characteristic which includes a plurality of MIMO antenna, each having a pair of antenna elements, to support multiple bands, and is capable of guaranteeing high antenna efficiency for different bands by minimizing an interference between antenna elements of each MIMO antenna to improve an isolation characteristic. The MIMO antenna system having a multi-band characteristic, which includes two pairs of antenna patterns to support different band and coupling antenna parts separated from and coupled with the pairs of antenna patterns, can improve an isolation through the coupling antenna parts and guarantee an antenna gain. Moreover, since signal interference caused by the coupling effect can be cancelled to guarantee a band width with no change in antenna characteristics, it is possible to constructing two or more antennas to support a multi-band while guaranteeing stable operation of the antennas.

Abstract: The present invention relates to a multilayer antenna which is capable of improving communication performance by reducing an antenna size and increasing an antenna gain by improving performance of a plurality of antenna elements disposed adjacent to each other using a coupling. The multilayer antenna includes an antenna plate for coupling is arranged over plurality of antenna strips in a manner to be isolated from the antenna strips. With this configuration, the multilayer antenna is capable of increasing channel capacity and data transfer rate by reducing an antenna size and intercepting mutual interference and noise between the antenna elements.

Abstract: An antenna for a built-in multimedia receiver in a vehicle to use a multimedia service such as HD radio, DMB, and the like. The antenna may function as a message board that may externally display a predetermined message, such as driver's phone number, as well as receive the multimedia signal. The antenna not only receives a multimedia service signal but also transmits the multimedia service signal to a basic multimedia reproduction device included in the vehicle, thus enabling efficient addition of another multimedia receiver to the vehicle with the minimum wiring.