Filter apparatus

A filter apparatus comprising:

• a multilayer body including a plurality of dielectric layers;
• an input terminal, an output terminal, and a ground terminal in the multilayer body;
• a ground electrode connected to the ground terminal;
• a first resonator, a second resonator, a third resonator, and a fourth resonator magnetically coupled to one another inside of the multilayer body and located in a signal transmission path from the input terminal to the output terminal;
• each of the first resonator to the fourth resonator including:
• a capacitor electrode opposed to the ground electrode and defining a capacitor together with the ground electrode;
• and
• an inductor path that connects the capacitor electrode and the ground electrode to each other;
• the inductor path in the second resonator including a first line and a second line electrically connected in parallel, between the capacitor electrode of the second resonator and the ground electrode;
• the inductor path in the third resonator including a fourth line and a fifth line electrically connected in parallel, between the capacitor electrode of the third resonator and the ground electrode;
• a first interconnection pattern that connects the inductor path in the first resonator and the first line to each other;
• a second interconnection pattern that connects the first line and the second line to each other;
• a third interconnection pattern that connects the second line and the fifth line to each other;
• a fourth interconnection pattern that connects the inductor path in the fourth resonator and the fourth line to each other;
• and
• a fifth interconnection pattern that connects the fourth line and the fifth line to each other;
• wherein
• the second interconnection pattern connects the first line and the second line to each other at a position on the first line different from the first interconnection pattern;
• and
• the fifth interconnection pattern connects the fourth line and the fifth line to each other at a position on the fourth line different from the fourth interconnection pattern.