Power splitter/combiner circuit, high power amplifier and balun circuit

A power splitter or combiner circuit comprising:

• at least two stacked dielectric plates, i.e., first and second dielectric plates;
• a shield grounding conductor formed between said first and second dielectric plates;
• a transmission line formed of a conductor pattern on said first dielectric plate on the opposite side of said shield grounding conductor, having an input terminal 406 on an end thereof, and having a first through hole 415 on the other end thereof;
• .first and second quarter-wavelength lines 407, 408, ends thereof commonly connected to said transmission line, and the other ends 407a, 408a thereof provided with first and second output lines 429a, 429b, respectively;
• first and second absorption resistances 411, 412 connected to said other ends 407a, 408a of said first and second quarter-wavelength lines, respectively;
• a common terminal 416-a connected to the other ends of said first and second absorption resistances, and provided with a second through hole 417;
• third and fourth quarter-wavelength lines 409, 410 formed parallel to each other, each formed of a conductor pattern on said second dielectric plate on the opposite side of said shield grounding conductor, and ends thereof commonly connected electrically via said first through hole 415;
• third and fourth output lines 430a, 430b connected to the other ends 409a, 410a of said third and fourth quarter-wavelength lines 409a, 410a, respectively;
• third and fourth isolation resisitors 413, 414 connected to said other ends 409a, 410a of said third and fourth quarter-wavelength lines, respectively;
• and
• a common terminal 416-b connected to the other ends of said third and fourth absorption resistances, and having a through hole connected to said second through hole 417.

A balun comprising:

• a multilayer formed of dielectric layers and conductor pattern layers stacked alternately;
• a main line disposed on said conductor pattern layer;
• a plurality of coupling lines facing a part of said main line, disposed on said conductor pattern layer different from said conductor pattern layer on which said part of said main line is disposed, so as to electromagnetically coupled with said part of said main line, and grounded electrically;
• an input line disposed on one of said conductor pattern layers;
• and
• output line pairs, each pair connected across both ends of each of said coupling lines,
• wherein one end of said main line is connected to said input line, the other end thereof is electrically grounded, the power of a signal input to said input line is split and propagated to each of said output terminal pairs via each of said coupling lines, and a signal propagated from one output line of said output line pair is 180 degrees out of phase with the other signal propagated from the other output line.