A filter circuit (100) includes an input node (Port_1), an output node (Port_2), a first filtering element (110) and a second filtering element (120). The first filtering element (110) has a first terminal coupled to the input node (Port_1) and a second terminal, and is configured to provide a first signal conducting path toward the second terminal for conducting a first signal received at the input node (Port_1) to the second terminal. The second filtering element (120) has a first terminal coupled to the input node (Port_1) and a second terminal, and is configured to provide a second signal conducting path toward the output node (Port_2) for conducting a second signal received at the input node (Port_1) to the output node (Port_2). The second terminal of the first filtering element (110) and the second terminal of the second filtering element (120) are open-circuit terminals.