An apparatus including a liquid crystal polymer substrate having a top surface and a bottom surface, a coplanar waveguide formed on the top surface of the liquid crystal polymer substrate, the coplanar waveguide having a 90 degree bend with a mitered edge, an inner via positioned adjacent to an inner...http://www.google.co.uk/patents/US7990237?utm_source=gb-gplus-sharePatent US7990237 - System and method for improving performance of coplanar waveguide bends at mm-wave frequencies