Power amplification system, radio frequency transmission system, and signal transmission apparatus

A power amplification system, comprising:

• a hybrid coupler, a first amplifier, a second amplifier, a first impedance conversion line, and a second impedance conversion line, wherein an output port of the first amplifier is coupled to the hybrid coupler via the first impedance conversion line, and an output port of the second amplifier is coupled to the hybrid coupler via the second impedance conversion line;
• wherein the first amplifier and the second amplifier are configured to output a plurality of radio frequency signals;
• and
• wherein the hybrid coupler is configured to:
• perform impedance conversion with the first impedance conversion line or the second impedance conversion line;
• and
• output a combined radio frequency signal from a fourth port of the hybrid coupler, wherein the combined radio frequency signal is obtained by combining the plurality of radio frequency signals.

A radio frequency transmission system, comprising:

• a radio frequency generation circuit;
• and
• a power amplification system, wherein an output port of the radio frequency generation circuit is coupled to an input port of the power amplification system, and wherein the power amplification system comprises a hybrid coupler, a first amplifier, a second amplifier, a first impedance conversion line, and a second impedance conversion line, wherein an output port of the first amplifier is coupled to the hybrid coupler via the first impedance conversion line, and an output port of the second amplifier is coupled to the hybrid coupler via the second impedance conversion line;
• wherein the first amplifier and the second amplifier are configured to output a plurality of radio frequency signals;
• and
• wherein the hybrid coupler is configured to:
• perform impedance conversion with the first impedance conversion line or the second impedance conversion line;
• and
• output a combined radio frequency signal from a fourth port of the hybrid coupler, wherein the combined radio frequency signal is obtained by combining the plurality of radio frequency signals.

A signal transmission apparatus, comprising:

• a baseband processing system;
• and
• a radio frequency transmission system, comprising a radio frequency generation circuit and a power amplification system, wherein an output port of the radio frequency generation circuit is coupled to an input port of the power amplification system;
• wherein the power amplification system comprises a hybrid coupler, a first amplifier, a second amplifier, a first impedance conversion line, and a second impedance conversion line, wherein an output port of the first amplifier is coupled to the hybrid coupler via the first impedance conversion line, and an output port of the second amplifier is coupled to the hybrid coupler via the second impedance conversion line;
• wherein the first amplifier and the second amplifier are configured to output a plurality of radio frequency signals;
• and
• wherein the hybrid coupler is configured to:
• perform impedance conversion with the first impedance conversion line or the second impedance conversion line;
• and
• output a combined radio frequency signal from a fourth port of the hybrid coupler, wherein the combined radio frequency signal is obtained by combining the plurality of radio frequency signals.