Transceiver using technique for improvement of phase noise and switching of phase lock loop (pll)

A transceiver comprising:

• a plurality of antennas including a first antenna and a second antenna;
• a plurality of first quenching waveform generators (QWGs) configured to generate a quenching waveform of a first transmission radio frequency (Tx RF) part and a quenching waveform of a first reception RF (Rx RF) part corresponding to the first antenna;
• and
• a plurality of second QWGs configured to generate a quenching waveform of a second Tx RF part and a quenching waveform of a second Rx RF part corresponding to the second antenna,
• wherein the quenching waveforms control a plurality of voltage controlled oscillators (VCOs) operating at the same frequency, and
• the first QWGs and the second QWGs are configured to control the plurality of VCOs by generating quenching waveforms that do not overlap with each other.

A transceiver comprising:

• a plurality of antennas including a first antenna and a second antenna;
• a first radio frequency (RF) part including a first transmission RF part and a first reception RF part corresponding to the first antenna;
• and
• a second RF part including a second transmission RF part and a second reception RF part corresponding to the second antenna,
• wherein each of the first RF part and the second RF part comprises:
• a phase lock loop (PLL) configured to provide a reception frequency to a corresponding reception part and provide a transmission frequency to a corresponding transmission part, and to be controlled according to whether the corresponding reception part or the corresponding transmission part is turned on;
• a plurality of voltage controlled oscillators (VCOs) configured to operate at a same frequency;
• and
• a plurality of quenching waveform generators (QWGs) configured to generate a quenching waveform for a corresponding transmission part and a quenching waveform for a corresponding reception part to control operation of the VCOs such that the quenching waveforms do not overlap in time.