Patent ID: 9413328
Filing Date: 2016-08-09
CPC Classification: H03H

Claim Text:
1. A diplexer comprising: an input terminal to receive a first signal of a frequency within a first frequency band and a second signal of a frequency within a second frequency band higher than the first frequency band; a first output terminal for outputting the first signal; a second output terminal for outputting the second signal; a first bandpass filter provided between the input terminal and the first output terminal and selectively passing the first signal; and a second bandpass filter provided between the input terminal and the second output terminal and selectively passing the second signal, wherein the first bandpass filter includes a plurality of first resonators, the second bandpass filter is directly connected to the second output terminal and is composed only of a second resonator and a series resonant circuit, the series resonant circuit connecting the input terminal and the second resonator, and the series resonant circuit is composed of a capacitor provided between the input terminal and the second resonator, and an inductance component of a line that connects the input terminal and the second resonator via the capacitor.