An antenna arrangement for an electronic key includes an antenna, and an antenna circuit configured to control the antenna, wherein the antenna and the antenna circuit are arranged on a printed circuit board, the antenna arrangement is configured to transmit and receive ultra-wide band signals or signals according to a Bluetooth standard, and the antenna circuit includes a filter arrangement configured to filter signals received by and to be sent by the antenna, wherein the filter arrangement includes a capacitance formed by at least two conducting paths formed on the printed circuit board.