Abstract: A radio frequency (RF) communication assembly includes an RF communication circuit and a compensator apparatus. The compensator apparatus receives an input including an I-component of a pre-compensated signal, a Q-component of the pre-compensated signal, and encoded operating conditions of the RF communication circuit. The RF communication circuit includes RF circuit components causing signal impairments. The compensator apparatus perform neural network computing on the input, and the RF communication assembly generates a compensated output signal that compensates for at least a portion of the signal impairments.

Abstract: A voltage converter is connected with a load. The voltage converter includes a power source, a first switching element, a second switching element, an energy storage inductor, an energy storage capacitor and N capacitor modules. The first switching element is connected between a first terminal of the power source and a first node. The second switching element is connected between the first node and a second node. A second terminal of the power source is connected with the second node. The energy storage inductor is connected between the first node and the third node. The N capacitor modules are connected between the third node and a fourth node, wherein N is a positive integer. The energy storage capacitor is connected between the fourth node and the second node.

Abstract: A radio frequency (RF) communication assembly includes an RF communication circuit and a compensator apparatus. The compensator apparatus receives an input including an I-component of a pre-compensated signal, a Q-component of the pre-compensated signal, and encoded operating conditions of the RF communication circuit. The RF communication circuit includes RF circuit components causing signal impairments. The compensator apparatus perform neural network computing on the input, and the RF communication assembly generates a compensated output signal that compensates for at least a portion of the signal impairments.

Abstract: According to at least one aspect, a communication system is provided. The communication system includes a first switch device configured to receive a first plurality of radio frequency (RF) signals detected by an antenna array and provide an RF signal selected from among the first plurality of RF signals to a receiver circuit, the first plurality of RF signals comprising a first RF signal in a first frequency range and a second RF signal in a second frequency range that is different from the first frequency range; and a second switch device configured to receive a second plurality of RF signals detected by the antenna array and provide an RF signal selected from among the second plurality of RF signals to the receiver circuit, the second plurality of RF signals comprising a third RF signal in the first frequency range and a fourth RF signal in the second frequency range.

Abstract: According to at least one aspect, a communication system is provided. The communication system includes a first switch device configured to receive a first plurality of radio frequency (RF) signals detected by an antenna array and provide an RF signal selected from among the first plurality of RF signals to a receiver circuit, the first plurality of RF signals comprising a first RF signal in a first frequency range and a second RF signal in a second frequency range that is different from the first frequency range; and a second switch device configured to receive a second plurality of RF signals detected by the antenna array and provide an RF signal selected from among the second plurality of RF signals to the receiver circuit, the second plurality of RF signals comprising a third RF signal in the first frequency range and a fourth RF signal in the second frequency range.

Abstract: A filtering system includes a first filtering module, which includes a first frequency translating device and a first filter. The first frequency translating device includes a center frequency control end that receives a first control signal and an input end that receives an input signal, and performs a first frequency translation on the input signal by utilizing a first control frequency of the first control signal as a center frequency. The first filter performs a first filter on the input signal according to equivalent impedance of a circuit coupled to the input end, and generates in collaboration with the first frequency translating device a first filtered input signal at an output end of the filtering system. The equivalent impedance determines a bandwidth of the first filtered input signal.

Abstract: A filtering system includes a first filtering module, which includes a first frequency translating device and a first filter. The first frequency translating device includes a center frequency control end that receives a first control signal and an input end that receives an input signal, and performs a first frequency translation on the input signal by utilizing a first control frequency of the first control signal as a center frequency. The first filter performs a first filter on the input signal according to equivalent impedance of a circuit coupled to the input end, and generates in collaboration with the first frequency translating device a first filtered input signal at an output end of the filtering system. The equivalent impedance determines a bandwidth of the first filtered input signal.

Abstract: The invention discloses the variable attenuator with characteristics, comprising wide attenuation ranges; syntheses on group delays, and low variation of the group delay. The building blocks, which construct the variable attenuator, comprise internal matching networks, external matching networks, delay networks, protecting networks, biasing network, a power combining network, and variable impedance networks. The elements, which realize the internal matching networks, external matching networks, signal combining networks, comprise resistor, inductor, capacitor, and transmission lines. The elements, which realize the variable impedance networks, comprise n-channel field-effect transistor (FET), p-channel FET, n-type bipolar junction transistor (BJT), and p-type BJT. The elements of the variable attenuator can be either integrated on a semiconductor chip by using system-on-chip (SOC) technologies.

Abstract: The invention discloses the variable attenuator with characteristics, comprising wide attenuation ranges; syntheses on group delays, and low variation of the group delay. The building blocks, which construct the variable attenuator, comprise internal matching networks, external matching networks, delay networks, protecting networks, biasing network, a power combining network, and variable impedance networks. The elements, which realize the internal matching networks, external matching networks, signal combining networks, comprise resistor, inductor, capacitor, and transmission lines. The elements, which realize the variable impedance networks, comprise n-channel field-effect transistor (FET), p-channel FET, n-type bipolar junction transistor (BJT), and p-type BJT. The elements of the variable attenuator can be either integrated on a semiconductor chip by using system-on-chip (SOC) technologies.

Abstract: A system and method for customizing functions of a mobile phone provides different operation modes for different users of the mobile phone. The system and method further provides different function features under the different operation modes.

Abstract: A chip antenna has a dielectric material layer, a first meandered strip, a second meandered strip and several bended strips. The first meandered strip is meandered in one direction and disposed on the dielectric material layer. The second meandered strip is meandered in another direction and disposed on the dielectric material layer. The first meandered strip is connected to the second meandered strip. The bended strips are connected to the turns of the meandered strips.

Abstract: A chip antenna apparatus for receiving global positioning system signals, includes a L-shaped ground area and an omni-directional chip antenna. The L-shaped ground area is disposed on a circuit board. The omni-directional chip antenna is disposed in a gap of the L-shaped ground area on the circuit board and electrically connected to the L-shaped ground area.

Abstract: A discontinuous transmission line structure includes an input transmission line, an output transmission line, a plurality of meandered inductors, coupled in series between the input transmission line and the output transmission line, and a plurality of shunted to grounded capacitors, coupled between the meandered inductors. The discontinuous transmission line structure has a high inductance and a high capacitance, and can effectively reduce the size by increasing the transmission line load impedance and capacitance while the characteristic impedance of the transmission line structure remains.

Abstract: A connection apparatus for a chip antenna includes a connection base and at least one chip slot. The connection base is disposed on a circuit board and connects to the electronic components of the circuit board via a connection wire. The chip slot is disposed on the connection base for inserting the chip antenna. Thus, the chip antenna is connected to the electronic components of the circuit board via the connection wire.

Abstract: A chip antenna apparatus for receiving global positioning system signals, includes a L-shaped ground area and an omni-directional chip antenna. The L-shaped ground area is disposed on a circuit board. The omni-directional chip antenna is disposed in a gap of the L-shaped ground area on the circuit board and electrically connected to the L-shaped ground area.

Abstract: A device shell for use in a wireless communication device, is disclosed to have a shell body injection-molded from a compound material in a predetermined shape, and an antenna circuit formed in the shell body and electrically connectable to a circuit board in a wireless communication device in which the device shell is used.

Abstract: A connection apparatus for a chip antenna includes a connection base and at least one chip slot. The connection base is disposed on a circuit board and connects to the electronic components of the circuit board via a connection wire. The chip slot is disposed on the connection base for inserting the chip antenna. Thus, the chip antenna is connected to the electronic components of the circuit board via the connection wire.

Abstract: This disclosure relates to a broadband antenna apparatus having single or multiple winding strips. The broadband antenna apparatus has a dielectric material layer, and the single or multiple winding strips surround one another over the dielectric material layer. An antenna feed is located on the single or multiple winding strips, and ground terminals can be added.

Abstract: A chip antenna has a dielectric material layer, a first meandered strip, a second meandered strip and several bended strips. The first meandered strip is meandered in one direction and disposed on the dielectric material layer. The second meandered strip is meandered in another direction and disposed on the dielectric material layer. The first meandered strip is connected to the second meandered strip. The bended strips are connected to the turns of the meandered strips.