Patent ID: 9203371
Filing Date: 2015-12-01
Classification: H01P,H03H

Abstract:
1. An electrical filter for forwarding a first electrical signal from a first filter port to a second filter port in a first frequency-selective manner, and for forwarding a second electrical signal from a third filter port to a fourth filter port in a second frequency-selective manner, the filter comprising: a first filter core comprising the first filter port, the second filter port, a plurality of series impedance elements coupled between the first filter port and the second filter port and a plurality of shunt impedance elements, wherein the shunt impedance elements of the first filter core are implemented using transmission lines coupled to nodes, wherein a first shunt impedance element is electrically coupled between impedance elements coupled in series of the first filter core; a second filter core comprising the third filter port, the fourth filter port, a plurality of series impedance elements coupled between the third filter port and the fourth filter port and a plurality of shunt impedance elements, wherein the shunt impedance elements of the second filter core are implemented using transmission lines coupled to nodes, wherein a second shunt impedance element is electrically coupled between impedance elements coupled in series of the second filter core; and wherein the shunt impedance elements of the first filter core are arranged in first and second conducting layers of a multi-layer structure and the shunt impedance elements of the second filter core are arranged in third and fourth conducting layers of the multi-layer structure, wherein the multi-layer structure is located between the first filter structure and the second filter structure.