Semiconductor package assemblies and semiconductor packages incorporating an impedance-boosting channel between a transmitter die and a receiver die are described. In an example, a semiconductor package includes a package substrate incorporating the impedance-boosting channel having a first arc segment connected to the transmitter die and a second arc segment connected to the receiver die. The arc segments extend around respective vertical axes passing through a transmitter die electrical bump and a receiver die electrical bump, respectively. Accordingly, the arc segments introduce an inductive circuitry to increase signal integrity of an electrical signal sent from the transmitter die to the receiver die.