Epcos Ag

Roman Kravchenko

Patric Heide

Georgiy Sevskiy

Denys Orlenko

A bandpass filter is described herein. The bandpass filter has two parallel signal branches, each connected, on an input side, to an input node and, on an output side, to an output node. The two signal branches form a ring resonator, having a wave mode with a complex amplitude of {right arrow over (U)}=|{right arrow over (U)}|exp{&#x2212;j&#x3c6;} propagating in a clockwise direction and a wave mode with a complex amplitude of {right arrow over (U)}=|{right arrow over (U)}|exp{&#x2212;j&#x3c6;} propagating in a counterclockwise direction. The vector sum of a resulting wave {right arrow over (U)}at the output node of the bandpass filter at two or more stop frequencies is: {right arrow over (U)}={right arrow over (U)}+{right arrow over (U)}=0, and |{right arrow over (U)}|=|{right arrow over (U)}| and |&#x3c6;&#x2212;&#x3c6;|=180&#xb0;. The stop frequencies are arranged such that a passband is formed between two stop frequencies.

Growing community of inventors

Graz, Austria

Roman Kravchenko