Abstract: A wireless communication device is provided. The wireless communication device includes a first wireless communication protocol transceiver, a second wireless communication protocol transceiver, a signal frequency splitter and a signal filter. The first wireless communication protocol transceiver accesses data with a first wireless communication protocol. The signal frequency splitter splits a receiving signal received by a second antenna and a transmitting signal transmitted by the second antenna according to a receiving frequency band and a transmitting frequency band of a second wireless communication protocol. The signal filter coupled to the signal frequency splitter and a receiving terminal of the second wireless communication protocol transceiver filters a signal in a receiving frequency band of the first wireless communication protocol and the receiving frequency band of the second wireless communication protocol.

Abstract: A communication system includes a baseband processor, an RF (Radio Frequency) transceiver, a power amplifier, an antenna, and a control circuit. The power amplifier generates an amplified signal. The control circuit includes a coupler, an AC-to-DC (Alternating Current to Direct Current) converter, a comparator, and an attenuator. The coupler generates a transmission signal and a coupling signal according to the amplified signal. The AC-to-DC converter is coupled to the coupler, and converts the coupling signal into a DC (Direct Current) signal. The comparator compares a DC voltage of the DC signal with a reference voltage so as to generate a control signal. The attenuator is coupled between the coupler and the antenna, and attenuates or does not attenuate the transmission signal according to the control signal.

Abstract: An adjustment module, an electronic device with the adjustment module, and an antenna performance adjusting method thereof are disclosed. The adjustment module is used for adjusting an antenna module. The antenna module is disposed in the electronic device and used for radiating a wireless signal. The adjustment module includes a monitoring module, a determining module, and a capacitance adjusting unit. The monitoring module is used for detecting an alternating current signal waveform when the antenna module radiates the wireless signal. The determining module receives the alternating current signal waveform and is used for generating an adjusting voltage value when the alternating current signal waveform is a non-constant amplitude. The capacitance adjusting unit is used for changing a capacitance value according to the adjusting voltage value to adjust a resonance point coordinate of the antenna module.

Abstract: A communication system includes a baseband processor, an RF (Radio Frequency) transceiver, a power amplifier, an antenna, and a control circuit. The power amplifier generates an amplified signal. The control circuit includes a coupler, an AC-to-DC (Alternating Current to Direct Current) converter, a comparator, and an attenuator. The coupler generates a transmission signal and a coupling signal according to the amplified signal. The AC-to-DC converter is coupled to the coupler, and converts the coupling signal into a DC (Direct Current) signal. The comparator compares a DC voltage of the DC signal with a reference voltage so as to generate a control signal. The attenuator is coupled between the coupler and the antenna, and attenuates or does not attenuate the transmission signal according to the control signal.

Abstract: An adjustment module, an electronic device with the adjustment module, and an antenna performance adjusting method thereof are disclosed. The adjustment module is used for adjusting an antenna module. The antenna module is disposed in the electronic device and used for radiating a wireless signal. The adjustment module includes a monitoring module, a determining module, and a capacitance adjusting unit. The monitoring module is used for detecting an alternating current signal waveform when the antenna module radiates the wireless signal. The determining module receives the alternating current signal waveform and is used for generating an adjusting voltage value when the alternating current signal waveform is a non-constant amplitude. The capacitance adjusting unit is used for changing a capacitance value according to the adjusting voltage value to adjust a resonance point coordinate of the antenna module.