Low pass filter having attenuation pole and wave splitter

A low pass filter having an attenuation pole, comprising:

• a multilayer body including a first surface and a second surface;
• an input terminal, an output terminal, and a ground terminal provided on the second surface of the multilayer body;
• at least one inductor disposed on a series arm configured to connect the input terminal and the output terminal;
• a plurality of parallel resonance circuits disposed on the series arm and arranged subsequent to the at least one inductor, each of the plurality of parallel resonance circuits including a capacitor and an inductor;
• and
• a capacitor disposed on a parallel arm configured to connect the series arm and the ground terminal;
• wherein
• at least two of the inductors disposed on the series arm are wound inductors mounted on the first surface of the multilayer body, and a winding axis of one of the wound inductors is perpendicular or substantially perpendicular to a winding axis of another one of the wound inductors.

A wave splitter comprising:

• a multilayer body including a first surface and a second surface;
• an input terminal, a first output terminal, and a first ground terminal provided on the second surface of the multilayer body;
• a low pass filter having an attenuation pole disposed between the input terminal and the first output terminal on the multilayer body;
• a second output terminal and a second ground terminal provided on the second surface of the multilayer body;
• and
• a high pass filter disposed between the input terminal and the second output terminal on the multilayer body and that includes capacitors and inductors;
• wherein
• the low pass filter includes:
• a plurality of parallel resonance circuits disposed on a series arm configured to connect the input terminal and the first output terminal, each of the plurality of parallel resonance circuits including a capacitor and an inductor;
• and
• a capacitor disposed on a parallel arm configured to connect the series arm and the first ground terminal;
• at least two of the inductors disposed on the series arm are wound inductors mounted on the first surface of the multilayer body, and a winding axis of one of the wound inductors is perpendicular or substantially perpendicular to a winding axis of another one of the wound inductors.

A wave splitter comprising:

• a multilayer body including a first surface and a second surface;
• an input terminal, a first output terminal, and a first ground terminal provided on the second surface of the multilayer body;
• a low pass filter having an attenuation pole disposed between the input terminal and the first output terminal on the multilayer body;
• a second output terminal and a second ground terminal provided on the second surface of the multilayer body;
• and
• a high pass filter disposed between the input terminal and the second output terminal on the multilayer body and that includes capacitors and inductors;
• wherein
• the low pass filter includes:
• at least one inductor disposed on a series arm configured to connect the input terminal and the first output terminal;
• a plurality of parallel resonance circuits disposed on the series arm, each of the plurality of parallel resonance circuits including a capacitor and an inductor;
• and
• a capacitor disposed on a parallel arm configured to connect the series arm and the first ground terminal;
• at least two of the inductors disposed on the series arm are wound inductors mounted on the first surface of the multilayer body, and a winding axis of one of the wound inductors is perpendicular or substantially perpendicular to a winding axis of another one of the wound inductors.