Patent ID: 9712131
Date: 2017-07-18
CPC Classifications: H03H

Claim:
1. An electrical circuit comprising: a plurality of ports, including at least one common port and two or more uncommon ports; operational elements providing a coupling means, coupling the plurality of ports together and creating a coupling relationship among the plurality of ports at an operational bandwidth including an operational frequency; one or more lossy band response circuits connected between one of the operational elements and at least one of a ground potential and another of the operational elements, the one or more lossy band response circuits each including one or more reactive elements and one or more resistive elements, the one or more resistive elements having resistance substantially greater than a parasitic resistance of the one or more reactive elements; wherein the one or more lossy band response circuits provide a minimum electrical isolation between the two or more uncommon ports over an enhanced bandwidth around the operational frequency, the enhanced bandwidth being greater than a passive bandwidth of a passive electrical isolation at or below the minimum electrical isolation, the passive electrical isolation and passive bandwidth being provided by a non-reactive resistance coupled one of (a) between the two or more uncommon ports in place of the one or more lossy band response circuits and (b) between the one of the operational elements and the at least one of the ground potential and the another of the operational elements in place of the one or more lossy band response circuits.