Waveguide assembly for use with launcher-in-package devices

A waveguide assembly comprising:

• a stack of a first laminate structure, a second laminate structure, and a substrate having a conductive surface proximal to the second laminate structure;
• wherein the first laminate structure comprises a plurality of metal layers with dielectric material therebetween and has at least one opening therethough having an opening length and a smaller opening width and configured to propagate millimetre-wavelength or microwave radiation through the first laminate structure;
• wherein the second laminate structure comprises a plurality of metal layers with dielectric material therebetween and an elongate cavity therethrough having a cavity width and extending in a first direction therealong and having conductive sidewalls and forming an air-filled waveguide for the millimetre-wavelength or microwave radiation;
• and
• wherein the opening is partially over an end of the elongate cavity, such that the opening length is aligned with the cavity width, and a sidewall of the opening along the opening length is offset from the end of the elongate cavity by an offset distance which is less that the opening width.

A waveguide assembly comprising:

• a stack of a first printed circuit board (PCB), a second PCB, and a metal foil substrate;
• wherein the first PCB comprises a plurality of metal layers with dielectric material therebetween, and has at least one waveguiding opening therethough having an opening length and a smaller opening width;
• wherein the second PCB comprises a plurality of metal layers with dielectric material therebetween, and an elongate cavity therethrough having a cavity width and extending in a first direction therealong;
• wherein the elongate cavity has conductive sidewalls and, with an upper surface of the metal foil substrate and a lower metal layer of the first PCB, forms an air-filled waveguide;
• and
• wherein the opening is partially over an end of the elongate cavity, such that the opening length is aligned with the cavity width, and a sidewall of the opening along the opening length is displaced from the end of the elongate cavity by an offset distance which is less that the opening width.