High-frequency module including connection terminals arranged at a small pitch

A high-frequency module comprising:

• a substrate having a first main surface and a second main surface, and including a plurality of connection terminals arranged to be connected to another circuit and provided on the first main surface of the substrate;
• at least one filter device mounted at a first side of the second main surface of the substrate, the at least one filter device including at least one set of an unbalanced terminal and two balanced terminals;
• and
• at least one element mounted at a second side opposite to the first side of the second main surface of the substrate, the element being electrically connected to the at least one filter device;
• wherein
• at least two of the plurality of connection terminals define specific connection terminals and are arranged on the first main surface of the substrate at the second side, so as to be spaced from via-hole conductors penetrating the substrate from inside a mounting area for mounting the at least one filter device on the second main surface of the substrate to the first main surface of the substrate;
• at least two connection lines respectively electrically connecting the specific connection terminals and the via-hole conductors are provided on the first main surface of the substrate;
• and
• a pitch of the specific connection terminals is less than a pitch of the via-hole conductors respectively electrically connected to the specific connection terminals via the connection lines.