Low pass filter having attenuation pole and wave splitter

摘要

A low pass filter having an attenuation pole includes at least inductors disposed on a series arm which connects an input terminal and an output terminal. The inductors are wound inductors mounted on a first surface of a multilayer body. A winding axis of one of the wound inductors is perpendicular or substantially perpendicular to a winding axis of the other one of the wound inductors.

主权项

1. 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; a plurality of parallel resonance circuits disposed on a series arm configured to connect the input terminal and the 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 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 at least two wound inductors is perpendicular or substantially perpendicular to a winding axis of another one of the at least two wound inductors; the multiplayer body is made of a low temperature co-fired ceramic; and at least one of the capacitors included in the plurality of parallel resonance circuits or the capacitor disposed on the parallel arm is provided within the multilayer body.