Abstract: An antenna device includes an antenna element, a sensing circuit, a matching circuit and an impedance adjusting circuit. The sensing element is used to generate a sensing signal. The matching circuit is coupled to the antenna unit. The impedance adjusting circuit is coupled to the sensing circuit and is capable of turning an impedance of the antenna unit and an impedance of the matching circuit into mismatch according to the sensing signal.

Abstract: An electronic device includes a display module, an NFC (Near-field Communication) module, a verification module and a control module. The display module is disposed on a first surface of the electronic device. The NFC module includes an antenna unit. The antenna unit is configured to transmit and receive a wireless signal from an outward direction of the first surface. The verification module is disposed on a second surface of the electronic device. The verification module is configured to generate an identification input data according to an operation of a user. The control module is configured to drive the verification module to generate the identification input data when the NFC module receives an identification requirement data, and configured to determine whether the identification input data is valid.

Abstract: A communication device includes an antenna unit, a sensing unit and a radio frequency unit. The antenna unit is configured to send a radio frequency signal. The sensing unit is coupled to a ground terminal through a capacitor and configured to sense a first capacitance through the antenna unit. The radio frequency unit is configured to generate the radio frequency signal, and to adjust energy of the radio frequency signal to a first energy according to the first capacitance. When the energy if the radio frequency signal is the first energy, the sensing unit is configured to sense a second capacitance through the antenna unit. The radio frequency unit is configured to adjust the energy of the radio frequency signal from the first energy to a second energy according to the second capacitance.

Abstract: An electronic device is provided. The electronic device includes a casing, a display module, and a communication module. The casing includes a first surface and a second surface. The display module is disposed on the first surface and has a display region. The communication module includes a first antenna module and a second antenna module. The first antenna module is disposed close to the display module and is corresponding perpendicularly to at least one part of the display region. The second antenna module is disposed close to the second surface. The communication module selectively receives and transmits a wireless signal along an outward direction extending from the first surface via the first antenna module or along an outward direction extending from the second surface via the second antenna module.

Abstract: An antenna system includes a ground plane, a microstrip-line coupler, a metal cover, and a main antenna. The microstrip-line coupler has a first input port, a second input port, a first output port, and a second output port. The metal cover is disposed above the microstrip-line coupler and coupled to the ground plane. The main antenna is coupled to the first output port and the second output port of the microstrip-line coupler. The metal cover is configured to reduce the interference from the microstrip-line coupler and to enhance the gain of the main antenna.

Abstract: A communication device is provided. The communication device includes an antenna unit, a sensing unit and a radio frequency unit. The antenna unit is configured to transmit a radio frequency signal. The sensing unit is coupled to a ground terminal through a first capacitor. The sensing unit is configured to sense a capacitance value through the antenna unit. The radio frequency unit is configured to generate the radio frequency signal and to regulate the energy of the radio frequency signal according to the capacitance value.

Abstract: An electronic device includes a display module, an NFC (Near-field Communication) module, a verification module and a control module. The display module is disposed on a first surface of the electronic device. The NFC module includes an antenna unit. The antenna unit is configured to transmit and receive a wireless signal from an outward direction of the first surface. The verification module is disposed on a second surface of the electronic device. The verification module is configured to generate an identification input data according to an operation of a user. The control module is configured to drive the verification module to generate the identification input data when the NFC module receives an identification requirement data, and configured to determine whether the identification input data is valid.

Abstract: A mobile device at least includes a dielectric substrate, an antenna array, and a transceiver. The antenna array at least includes a first antenna and a second antenna. The first and second antennas are both embedded in the dielectric substrate. The first and second antennas have different polarizations. The transceiver is coupled to the antenna array so as to transmit or receive a signal. The polarization of the antenna array may be dynamically adjusted by controlling a phase difference between the first antenna and the second antenna.

Abstract: A tunable impedance matching circuit is provided for matching a signal source to an impedance of an antenna. The tunable impedance matching circuit includes two terminals, a series path, and two shunt paths. The first terminal is coupled to the signal source, and the second terminal is coupled to the antenna. The series path is coupled between the first terminal and the second terminal and includes a first tunable capacitor and at least one tunable inductor. One of the two shunt paths is coupled between the first terminal and a ground end, and the other one of the two shunt paths is coupled between the second terminal and the ground end. Each of the shunt paths includes a second tunable capacitor.

Abstract: An electronic device is provided. The electronic device includes a casing, a display module, and a communication module. The casing includes a first surface and a second surface. The display module is disposed on the first surface and has a display region. The communication module includes a first antenna module and a second antenna module. The first antenna module is disposed close to the display module and is corresponding perpendicularly to at least one part of the display region. The second antenna module is disposed close to the second surface. The communication module selectively receives and transmits a wireless signal along an outward direction extending from the first surface via the first antenna module or along an outward direction extending from the second surface via the second antenna module.

Abstract: An antenna device includes an antenna element, a sensing circuit, a matching circuit and an impedance adjusting circuit. The sensing element is used to generate a sensing signal. The matching circuit is coupled to the antenna unit. The impedance adjusting circuit is coupled to the sensing circuit and is capable of turning an impedance of the antenna unit and an impedance of the matching circuit into mismatch according to the sensing signal.

Abstract: An electronic device includes an antenna, an RF circuit, and a matching circuit. The matching circuit is configured to provide variable impedance between the antenna and the RF circuit, wherein the matching circuit includes a first element having a first terminal and a second terminal, and wherein the first terminal is coupled to the antenna; a second element having a third terminal connected to the second terminal of the first element and a fourth terminal coupled to the RF circuit; a first tuning cell connected to the second terminal of the first element and the third terminal of the second element, and comprising a first tuning element, a second tuning element and a first control element, wherein the first control element determines whether to make a first node connected between the first and second tuning elements couple to a voltage level.

Abstract: An antenna system includes a ground plane, a microstrip-line coupler, a metal cover, and a main antenna. The microstrip-line coupler has a first input port, a second input port, a first output port, and a second output port. The metal cover is disposed above the microstrip-line coupler and coupled to the ground plane. The main antenna is coupled to the first output port and the second output port of the microstrip-line coupler. The metal cover is configured to reduce the interference from the microstrip-line coupler and to enhance the gain of the main antenna.

Abstract: A mobile device at least includes a dielectric substrate, an antenna array, and a transceiver. The antenna array includes a first antenna, a second antenna, and a third antenna. The third antenna is disposed between the first and second antennas so as to reduce coupling between the first and second antennas. The first, second and third antennas are all embedded in the dielectric substrate and substantially arranged in a straight line. Each of the first and second antennas is a transmission antenna and the third antenna is a reception antenna, or each of the first and second antennas is a reception antenna and the third antenna is a transmission antenna. The transceiver is coupled to the antenna array and is configured to transmit or receive a signal.

Abstract: An electronic device for processing radio frequency signals includes an antenna, an RF circuit, and a matching circuit. The matching circuit provides variable impedance between the antenna and the RF circuit. The antenna is capable of operating in a first frequency band or a second frequency band according to the variable impedance The matching circuit includes a first element; a second element; a first tuning cell connected to the first element and the second element, and comprising a first tuning element, a second tuning element and a first control element, the first control element determining whether to make a first node connected between the first and second tuning elements couple to a voltage level according to a first control signal; and a selecting circuit coupled to the first control element and configured to generate the first control signal so as to adjust the variable impedance.

Abstract: A touch panel includes a substrate, a sensing circuit, a circuit board module and a wireless circuit. The sensing circuit is disposed in a first area on a surface of the substrate and configured to receive a touch signal on the touch panel. The wireless circuit is disposed in a second area on the surface or disposed on a connection part of the circuit board module, and configured to receive/transmit a wireless signal. An electronic apparatus is also provided. A wireless circuit of the electronic apparatus includes a first antenna and a second antenna, which are disposed adjacent to a front side and a back side of the electronic apparatus, respectively. The wireless circuit is configured to receive/transmit a wireless signal selectively in the direction of the front side through the first antenna or in the direction of the back side through the second antenna.

Abstract: A tunable impedance matching circuit is provided for matching a signal source to an impedance of an antenna. The tunable impedance matching circuit includes two terminals, a series path, and two shunt paths. The first terminal is coupled to the signal source, and the second terminal is coupled to the antenna. The series path is coupled between the first terminal and the second terminal and includes a first tunable capacitor and at least one tunable inductor. One of the two shunt paths is coupled between the first terminal and a ground end, and the other one of the two shunt paths is coupled between the second terminal and the ground end. Each of the shunt paths includes a second tunable capacitor.

Abstract: A mobile device at least includes a dielectric substrate, an antenna array, and a transceiver. The antenna array at least includes a first antenna and a second antenna. The first and second antennas are both embedded in the dielectric substrate. The first and second antennas have different polarizations. The transceiver is coupled to the antenna array so as to transmit or receive a signal. The polarization of the antenna array may be dynamically adjusted by controlling a phase difference between the first antenna and the second antenna.

Abstract: A mobile device at least includes a dielectric substrate, an antenna array, and a transceiver. The antenna array includes a first antenna, a second antenna, and a third antenna. The third antenna is disposed between the first and second antennas so as to reduce coupling between the first and second antennas. The first, second and third antennas are all embedded in the dielectric substrate and substantially arranged in a straight line. Each of the first and second antennas is a transmission antenna and the third antenna is a reception antenna, or each of the first and second antennas is a reception antenna and the third antenna is a transmission antenna. The transceiver is coupled to the antenna array and is configured to transmit or receive a signal.

Abstract: An electronic device for processing radio frequency signals includes an antenna, an RF circuit, and a matching circuit. The matching circuit provides variable impedance between the antenna and the RF circuit. The antenna is capable of operating in a first frequency band or a second frequency band according to the variable impedance The matching circuit includes a first element; a second element; a first tuning cell connected to the first element and the second element, and comprising a first tuning element, a second tuning element and a first control element, the first control element determining whether to make a first node connected between the first and second tuning elements couple to a voltage level according to a first control signal; and a selecting circuit coupled to the first control element and configured to generate the first control signal so as to adjust the variable impedance.