Multiple-input multiple-output low-noise block downconverter and low-noise module

A low-noise block module, comprising:

• a low-noise block downconverter (LNB), comprising:
• a first input module, for outputting a first intermediate frequency (IF) signal;
• a second input module, for outputting a second IF signal;
• a first output module, coupled to the first input module via a first connection node, for amplifying the first IF signal, to output a first user signal to a first user;
• a second output module, coupled to the second input module via a second connection node, for amplifying the second IF signal, to output a second user signal to a second user;
• a first input end, coupled to the first input module, for receiving a first polarization signal;
• and
• a second input end, coupled to the second input module, for receiving a second polarization signal;
• wherein a first signal path comprising a first switch and a second signal path comprising a second switch, the first switch is coupled between a first IF amplifier of the first output module and a second output stage of the second output module, a second switch is coupled between a second IF amplifier of the second output module and a first output stage of the first output module;
• wherein the first input module further comprises a first oscillator, coupled to a first mixer, for generating a first oscillation signal with a first frequency and a second frequency selectively, and the second input module further comprises a second oscillator, coupled to a second mixer, for generating a second oscillation signal with the first frequency and the second frequency selectively;
• wherein the first mixer selectively outputs a first mixing signal at an IF band after receiving the first polarization signal and the first oscillation signal with the first frequency, and a second mixing signal at the IF band after receiving the first polarization signal and the first oscillation signal with the second frequency;
• the second mixer selectively outputs a third mixing signal at the IF band after receiving the second polarization signal and the second oscillation signal with the first frequency, and a fourth mixing signal at the IF band after receiving the second polarization signal and the second oscillation signal with the second frequency;
• wherein the first IF amplifier selectively receives one of the first mixing signal and the second mixing signal to output a first output signal, the second IF amplifier selectively receives one of the third mixing signal and the fourth mixing signal to output a second output signal, the first output stage selectively receives the first output signal and the second output signal to output the first user signal, and the second output stage selectively receives the first output signal and the second output signal to output the second user signal;
• wherein the LNB outputs the first user signal and the second user signal simultaneously;
• and
• wherein the first user signal relates to one of the first mixing signal, the second mixing signal, the third mixing signal and the fourth mixing signal, and the second user signal relates to one of the first mixing signal, the second mixing signal, the third mixing signal and the fourth mixing signal;
• and
• a control unit, for generating a control signal to the low-noise block downconverter according to inputs of the first user and the second user, to control conducting states of the first signal path and the second signal path, and operations of the first input module, the second input module, the first output module and the second output module, to reduce power consumption of the low-noise block downconverter.

A low-noise block downconverter (LNB), comprising:

• a first input module, for outputting a first intermediate frequency (IF) signal;
• a second input module, for outputting a second IF signal;
• a first output module, coupled to the first input module, for amplifying the first IF signal, to output a first user signal to a first user;
• a second output module, coupled to the second input module, for amplifying the second IF signal, to output a second user signal to a second user;
• a first input end, coupled to the first input module, for receiving a first polarization signal;
• and
• a second input end, coupled to the second input module, for receiving a second polarization signal;
• wherein a first signal path comprising a first switch and a second signal path comprising a second switch are coupled between the first input module and the second input module, the second switch is coupled to between the second input end and an input end of a first mixer of the first input module, and the first switch is coupled to between the first input end and an input end of a second mixer of the second input module, the first user signal relates to the first polarization signal or the second polarization signal, and the second user signal relates to the first polarization signal or the second polarization signal;
• wherein the first input module outputs the first IF signal after receiving one of the first polarization signal via the first input end of the LNB and the second polarization signal via the second signal path selectively, and the second input module outputs the second IF signal after receiving one of the second polarization signal via the second input end of the LNB and the first polarization signal via the first signal path selectively;
• wherein the LNB outputs the first user signal and the second user signal simultaneously;
• wherein the first input module further comprises a first oscillator, coupled to the first mixer, for generating a first oscillation signal with at least one of a first frequency and a second frequency selectively, and the second input module further comprises a second oscillator, coupled to the second mixer, for generating a second oscillation signal with at least one of the first frequency and the second frequency selectively;
• wherein the first mixer selectively outputs a first mixing signal at an IF band after receiving the first polarization signal and the first oscillation signal with the first frequency, a second mixing signal at the IF band after receiving the first polarization signal and the first oscillation signal with the second frequency, a third mixing signal at the IF band after receiving the second polarization signal and the first oscillation signal with the first frequency, and a fourth mixing signal at the IF band after receiving the second polarization signal and the first oscillation signal with the second frequency;
• the second mixer selectively outputs the first mixing signal at the IF band after receiving the first polarization signal and the second oscillation signal with the first frequency, the second mixing signal at the IF band after receiving the first polarization signal and the second oscillation signal with the second frequency, the third mixing signal at the IF band after receiving the second polarization signal and the second oscillation signal with the first frequency, and the fourth mixing signal at the IF band after receiving the second polarization signal and the second oscillation signal with the second frequency;
• and
• wherein the first IF signal comprises one of the first mixing signal, the second mixing signal, the third mixing signal, and the fourth mixing signal;
• and the second IF signal comprises one of the first mixing signal, the second mixing signal, the third mixing signal, and the fourth mixing signal;
• wherein the first input end is temporarily coupled to both the first mixer and the second mixer to simultaneously send the first polarization signal to both the first mixer and the second mixer;
• wherein the second input end is temporarily coupled to both the first mixer and the second mixer to simultaneously send the second polarization signal to both the first mixer and the second mixer.