the present embodiment the capacitive elements 115 have elements of an idt pattern in such a manner that the elements are geared with each other at predetermined intervals as shown fig4 the stub 117 is provided between the capacitive elements 115 and is electrically connected to the inductive element 150 by a first connection element 25 as shown in fig4 6 and to be described later on the ground unit 130 is provided on the other surface of the substrate 10 and is connected to the transmission unit 110 via the inductive element 150 the ground unit 130 functions to ground the transmission unit 110 in the present embodiment the ground unit 130 has a ground surface form formed on the bottom of the substrate 10 the inductive element 150 is provided between both surfaces of the substrate 10 and has a predetermined pattern and a constant inductance value meanwhile in the present embodiment the substrate 10 includes a first substrate 20 and a second substrate 30 adhered under the first substrate 20 the transmission unit 110 is provided on the top surface of the first substrate 20 and the ground unit 130 is provided on the bottom surface of the second.