A second conductor (200) is opposite to a first conductor (100), and is repeatedly arranged. A plurality of vias (400) are provided to each of a plurality of second conductors (200), and provide an inductance component between the first conductor (100) and the second conductor (200). A third conductor (300) is connected to a first one of the second conductors (200) through a via (500), and is opposite to a second one of the second conductors (200) located next to the first one of the second conductors (200), to thereby form a transmission line between the first one of the second conductors and the second one of the second conductors (200). That is, the third conductor (300) functions as a stub together with the second one of the second conductors (200).