High power combiner/divider

A power combiner comprising:

• a first triaxial transmission line structure operatively coupled between a first input port and an output port, the first triaxial transmission line structure including a dielectric material between an outer conductor and a semi-rigid coax cable having a corresponding semi-rigid coax cable shield used as a center conductor of the transmission line structure, wherein the dielectric material includes a number of high dielectric constant material disks and low dielectric constant material disks arranged in an alternating fashion, so as to transform transmission line impedance continuously from one end of the transmission line structure to the other end;
• a second triaxial transmission line structure having a similar structure to the first triaxial transmission line structure, and operatively coupled between a second input port and the output port;
• a balun operatively coupled between the semi-rigid coax cables of the first and second triaxial transmission line structures, the balun including a length of semi-rigid coax cable forming part of a short-circuited stub that is operatively coupled between a load proximate the input ports and the semi-rigid coax cables of the first and second triaxial transmission line structures proximate the output port, thereby enabling unbalanced currents flowing between the first and second triaxial transmission line structures to flow to the load instead of the output port, by way of a center conductor of the semi-rigid coax cable of the first triaxial transmission line structure and the short-circuited stub;
• and
• a housing that provides a ground plane to which the outer conductor of the first triaxial transmission line structure and an outer conductor of the second triaxial transmission line structure are integral or otherwise connected.

A power combiner comprising:

• a first triaxial transmission line structure operatively coupled between a first input port and an output port;
• a second triaxial transmission line structure operatively coupled between a second input port and the output port;
• and
• a balun operatively coupled to the first and second triaxial transmission line structures, and adapted to couple out unbalanced currents flowing therebetween, wherein the bauln includes a length of semi-rigid coax cable forming part of a short-circuited stub that is operatively coupled between a loud proximate the input ports and the first and second triaxial transmission line structures proximate the output port, thereby enabling unbalanced currents flowing between the first and second triaxial transmission line structures to flow to the load instead of the output port.