Launcher and coupling system for guided wave mode cancellation

A coupling module comprising:

• a waveguide that guides a first electromagnetic wave conveying data from a transmitting device;
• and
• a dielectric coupler that receives the first electromagnetic wave from the waveguide to form a second electromagnetic wave, and that guides the second electromagnetic wave along the dielectric coupler adjacent to a transmission medium, and wherein the dielectric coupler has a first length extending from an end of the waveguide, wherein the first length supports a cancellation of at least one cancelled wave mode from a coupling of the second electromagnetic wave to the transmission medium.

A coupling system comprising:

• waveguide means for guiding a first electromagnetic wave conveying data from a transmitting device;
• and
• conductorless coupling means for receiving the first electromagnetic wave from the waveguide means to form a second electromagnetic wave, and for guiding the second electromagnetic wave along the conductorless coupling means adjacent to a transmission medium, wherein the conductorless coupling means has a length extending from the waveguide means to an exposed end, wherein the length supports a cancellation of at least one cancelled wave mode when coupling the second electromagnetic wave to the transmission medium.