Multi-section coupler assembly

A coupler assembly comprising:

• a first asymmetric electromagnetic coupler including a plurality of coupler sections connected in cascade configuration, the plurality of coupler sections including at least a pair of electromagnetically coupled portions separated by an electromagnetically uncoupled portion;
• and
• a second electromagnetic coupler connected to the first coupler in tandem configuration.

A coupler assembly comprising:

• a first transmission line including a first conductor having at least first, second and third portions, the first portion electromagnetically coupled to the second portion;
• and
• a second transmission line including a second conductor having at least a first portion electromagnetically coupled to the third portion of the first conductor.

A coupler assembly comprising first and second transmission lines including respective first and second conductors electromagnetically coupled in a plurality of serially connected coupler sections, each coupler section including a coupled portion in which the first and second conductors are electromagnetically coupled and an uncoupled portion in which the first and second conductors are substantially electromagnetically uncoupled, with the conductors having substantially the same cross-sectional configuration in each coupled portion and lengths that are progressively longer or shorter in successive coupled portions.