Multi-path radio frequency system using local oscillation signals with frequencies having non-integer multiple relationship that are generated from same reference oscillation signal and associated local oscillation signal generation method

A multi-path radio frequency (RF) system comprising:

• a reference oscillation circuit, configured to generate a reference oscillation signal;
• a local oscillation (LO) generator circuit, configured to receive the reference oscillation signal, and generate a plurality of LO signals according to the reference oscillation signal, wherein a frequency of the reference oscillation signal is a non-integer multiple of a frequency of at least one of the plurality of LO signals;
• and
• a plurality of mixer circuits, located on a plurality of signal paths, respectively, and configured to receive the plurality of LO signals from the LO generator circuit, respectively;
• wherein the LO generator circuit comprises:
• a frequency processing circuit, configured to generate a plurality of oscillation signals according to the reference oscillation signal, wherein the frequency of the reference oscillation signal is an integer multiple of a frequency of each of the plurality of oscillation signals, and the plurality of LO signals comprise a first LO signal that is selected from the plurality of oscillation signals;
• and
• a frequency combination circuit, configured to combine at least a portion of the plurality of oscillation signals to generate a second LO signal included in the plurality of LO signals.