Low loss transmission line comprising a signal conductor and return conductors having corresponding curved arrangements

A transmission line comprising:

• a first return conductor comprising a first plurality of stepped conductive layers defining a first curve;
• a second return conductor comprising a second plurality of stepped conductive layers defining a second curve, wherein the first curve and the second curve are selected from the group consisting of:
• an exponential curve, a geometric curve, and a parabolic curve;
• and
• a signal conductor disposed between the first return conductor and the second return conductor, wherein the signal conductor is disposed in at least one intermediate dielectric layer of the transmission line.

A coplanar waveguide comprising:

• a first return conductor comprising a first plurality of stepped conductive layers;
• a second return conductor comprising a second plurality of stepped conductive layers;
• a reference plane coupled to the first return conductor and the second return conductor;
• and
• a signal conductor disposed between the first return conductor and the second return conductor, wherein the first plurality of stepped conductive layers of the first return conductor comprises a first set of stepped conductive lavers having first edges that define a first curve and a second set of stepped conductive layers having second edges that define a second curve, wherein the second plurality of stepped conductive layers of the second return conductor comprises a third set of stepped conductive layers having third edges that define a third curve and a fourth set of stepped conductive layers having fourth edges that define a fourth curve, and wherein the first edges, the second edges, the third edges, and the fourth edges are capacitively coupled with the signal conductor.