Abstract: Disclosed are a 3 dB orthogonal hybrid coupler, a radio-frequency front-end module and a communication terminal. The 3 dB orthogonal hybrid coupler can be arranged on a substrate, and a straight-through metal coil and a coupling metal coil are of a laminated structure, a coplanar structure or a combined form of the laminated structure and the coplanar structure, such that a corresponding radio-frequency signal input port is connected to a first radio-frequency signal output port, and an isolation port is connected to a second radio-frequency signal output port. Moreover, according to the requirements of the operating frequency and the port feature impedance of the 3 dB orthogonal hybrid coupler, the number of turns and the number of layers of the straight-through metal coil and the coupling metal coil are adjusted.

Abstract: A radio frequency power amplifier, a chip, and a communication terminal. The radio frequency power amplifier comprises a power amplifier circuit (5), an output matching circuit (2), a power detection circuit (3), and a bias comparison circuit (4). The output power on a main signal path is measured by the power detection circuit (3), and an equivalent voltage proportional to the output power is obtained and input to the bias comparison circuit (4); the equivalent voltage value is adjusted by means of the bias comparison circuit (4) and compared with a control voltage (1) to provide a bias voltage and/or collector voltage for the power amplifier circuit (5), thereby forming a closed-loop circuit, such that the radio frequency power amplifier can work in a stable state when gains and output power are in different power levels.

Abstract: Disclosed in the present invention are a high-bandwidth load modulation power amplifier, comprising a main-path power amplifier, an auxiliary-path power amplifier, a quadrature coupler, a main-path radio frequency signal matching network, an auxiliary-path radio frequency signal matching network and an output combined-path radio frequency signal matching network. When an input of a radio frequency signal is received, the quadrature coupler divides the input radio frequency signal into two paths of radio frequency signals, which have a 90-degree phase difference therebetween, wherein the radio frequency signal, which has a +45-degree phase, enters the main-path power amplifier, and the radio frequency signal, which has the ?45-degree phase, enters the auxiliary-path power amplifier; and the output combined-path radio frequency signal matching network synthesizes a main-path signal and an auxiliary-path signal and then outputs a radio frequency signal.

Abstract: A power detection circuit (3) having a temperature compensation function, and a radio-frequency front-end module comprising the power detection circuit. The power detection circuit (3) comprises at least one Stage of power detection unit (Stage 1, Stage 2, Stage 3) and an integration unit (Sum), wherein an input end of the integration unit (Sum) is connected to an output end of the power detection unit (Stage 1, Stage 2, Stage 3); a resistor which is connected to a bias voltage in the power detection unit (Stage 1, Stage 2, Stage 3) is a thermistor, and/or a resistor which is connected to a reference ground potential in the integration unit (Sum) is a thermistor. The technical problem of requiring a plurality of bias voltages (Vreg) with different temperature coefficients to supply power due to different circuit modules having different requirements for temperature coefficients of bias voltages (Vreg) is solved.

Abstract: Disclosed in the present invention are an electromagnetic shielding structure, a manufacturing method and a communication terminal. The electromagnetic shielding structure comprises a module substrate, which is formed with a plurality of grounding holes penetrating through the module substrate, and the plurality of grounding holes jointly define a mounting area; a device to be shielded, which is attached to the module substrate and located in the mounting area; a plurality of grounding bonding pads, which are respectively arranged in the grounding holes in a penetrating manner; and a plurality of wires, wherein the two ends of each wire are respectively connected to two different grounding bonding pads, such that the plurality of wires jointly form a shielding layer erected above the device to be shielded.

Abstract: Disclosed are a radio frequency front-end module having a current protection function, and an electronic device. The radio frequency front-end module comprises an input matching module, a power amplifier, an output matching module, a power supply module, and a protection unit. An input end of the input matching module is connected to an external radio frequency signal input end, an output end of the input matching module is connected to an input end of the power amplifier, an output end of the power amplifier is connected to an input end of the output matching module, and an output end of the output matching module is connected to a radio frequency signal output end; output ends of the power supply module and the protection unit are respectively connected to the power amplifier.

Abstract: Disclosed in the present invention is a radio frequency front-end module, comprising at least one driving amplifier and at least one power amplifier. The output end of the driving amplifier is connected to the input end of the power amplifier. The radio frequency front-end module is powered by a power supply when working. When a preset power switching condition is met, the at least one driving amplifier and/or the power amplifier is powered by the power supply and a battery supply. The radio frequency front-end module provided by the present invention can eliminate the limitation of insufficient working current of a power management chip on the overall maximum output power in a low-voltage and high-power working state, and meets the application requirements of the electronic device on an APT mode.

Abstract: Disclosed in the present invention are a balanced radio frequency power amplifier, a chip and a communication terminal. The radio frequency power amplifier divides, by means of a 90-degree power splitter unit, a radio frequency input signal into two equal-amplitude signals having a phase difference of 90 degrees, the two radio frequency input signals are amplified and then inputted into an adjustable 90 -degree power combiner, and the values of a adjustable capacitor and an adjustable resistor in the adjustable 90-degree power combiner are controlled by means of a control unit, so as to synthesize the two radio frequency input signals into one radio frequency input signal when the phase difference and amplitude difference of the two signals at different frequencies are the smallest, and to input the radio frequency input signal into a circuit of the next stage by means of a specific radio frequency transmission path.

Abstract: Disclosed is a radio frequency power amplifier that reduces load change sensitivity, which comprises a feedback circuit (10) and a plurality of levels of amplification circuit, the feedback circuit (10) and all or a portion of amplification circuit among the plurality of levels of amplification circuit being connected in parallel between a first node (M) and a second node (N), and a feedback loop made up of the feedback circuit (10) and an amplification circuit main path located between the first node (M) and the second node (N) forming a 180°+360°×n phase shift, where n is a natural number.

Abstract: Disclosed in the present invention are a radio frequency power amplifier, a radio frequency front-end module, and a communication terminal. The power amplifier includes a control unit, a power amplification unit, a detection and comparison unit, and a gain adjustment unit. According to a function relationship between the gain of the power amplification unit and the output power of the power amplification unit in different frequency bands and different power level modes, the control unit adjusts a function relationship between an adjustment current generated by the gain adjustment unit and a bias current of the power amplification unit; then the detection and comparison unit compares the bias current, of the power amplification unit with a reference current; according to the comparison result, the control unit controls whether the gain adjustment unit needs to generate an adjustment current and output the same to the power amplification unit.

Abstract: Disclosed are a 3 dB orthogonal hybrid coupler, a radio-frequency front-end module and a communication terminal. The 3 dB orthogonal hybrid coupler can be arranged on a substrate, and a straight-through metal coil and a coupling metal coil are of a laminated structure, a coplanar structure or a combined form of the laminated structure and the coplanar structure, such that a corresponding radio-frequency signal input port is connected to a first radio-frequency signal output port, and an isolation port is connected to a second radio-frequency signal output port. Moreover, according to the requirements of the operating frequency and the port feature impedance of the 3 dB orthogonal hybrid coupler, the number of turns and the number of layers of the straight-through metal coil and the coupling metal coil are adjusted.

Abstract: Disclosed are a radio-frequency power amplifier, a radio-frequency front-end module and a communication terminal. The radio-frequency power amplifier includes a control unit, a power amplification unit, a detection unit and an input matching unit. In the radio-frequency power amplifier, the detection unit detects an index parameter related to the output power of the power amplification unit in real time, converts the index parameter into a voltage positively correlated to the magnitude of the index parameter, and outputs the voltage to the input matching unit, such that a phase change of a radio-frequency signal input into the power amplification unit is the opposite of a phase change generated by an output signal of the power amplification unit, thereby effectively realizing the compensation of phase distortion of radio-frequency signals output by the power amplification unit in different modes, and improving a linearity index of the radio-frequency front-end module.

Abstract: Disclosed are a serial communication apparatus and a serial communication method. The serial communication apparatus comprises a radio frequency front-end module and a radio frequency device, a first input interface and a second input interface of the radio frequency front-end module being correspondingly connected to output interfaces of a main control module, a first output interface of the radio frequency front-end module being connected to a first input interface of the at least one radio frequency device via a first signal bus, a second output interface of the radio frequency front-end module being connected to a second input interface of the at least one radio frequency device via a second signal bus. The present invention satisfies requirements for convenient and rapid unidirectional communication between various chips of the radio frequency front-end module and inside the chips, reduces communication complexity, and increases transmission efficiency.

Abstract: A radio frequency power amplifier, a chip, and a communication terminal. The radio frequency power amplifier comprises a power amplifier circuit (5), an output matching circuit (2), a power detection circuit (3), and a bias comparison circuit (4). The output power on a main signal path is measured by the power detection circuit (3), and an equivalent voltage proportional to the output power is obtained and input to the bias comparison circuit (4); the equivalent voltage value is adjusted by means of the bias comparison circuit (4) and compared with a control voltage (1) to provide a bias voltage and/or collector voltage for the power amplifier circuit (5), thereby forming a closed-loop circuit, such that the radio frequency power amplifier can work in a stable state when gains and output power are in different power levels.

Abstract: Disclosed in the present invention are a balanced radio frequency power amplifier, a chip and a communication terminal. The radio frequency power amplifier divides, by means of a 90-degree power splitter unit, a radio frequency input signal into two equal-amplitude signals having a phase difference of 90 degrees, the two radio frequency input signals are amplified and then inputted into an adjustable 90-degree power combiner, and the values of a adjustable capacitor and an adjustable resistor in the adjustable 90-degree power combiner are controlled by means of a control unit, so as to synthesize the two radio frequency input signals into one radio frequency input signal when the phase difference and amplitude difference of the two signals at different frequencies are the smallest, and to input the radio frequency input signal into a circuit of the next stage by means of a specific radio frequency transmission path.

Abstract: Disclosed in the present invention are a radio frequency power amplifier based on power detection feedback, a chip, and a communication terminal. The radio frequency power amplifier comprises multiple stages of amplifier circuits and at least one power detection feedback circuit; the input end of the power detection feedback circuit is connected to the output end of a current stage of amplifier circuit, and the output end of the power detection feedback circuit is connected to the input ends of the current stage of amplifier circuit and at least one stage of amplifier circuit located prior to the current stage of amplifier circuit. The power detection feedback circuit generates, according to the detected output power of the current stage of amplifier circuit, a control voltage varying inversely with the output power, so that the power detection feedback circuit outputs current varying positively with the control voltage.

Abstract: Disclosed are a radio frequency transistor for improving radio frequency switch performance, a chip and a mobile terminal. The radio frequency transistor comprises a first metal layer, a second metal layer, a polysilicon layer and an active area, the first metal layer being connected to the active area via contact holes, the first metal layer being connected to the second metal layer via through holes. The wiring direction of the second metal layer is perpendicular to the wiring direction of the polysilicon layer, thereby reducing parallel areas between the polysilicon layer and the first metal layer and decreasing the numbers of contact holes and through holes, so as to reduce the off capacitance. In addition, space saved by the first metal layer wiring and the contact holes is utilized, thereby increasing the channel width of the radio frequency transistor accommodated in a same chip area, and reducing the on-resistance.

Abstract: Disclosed in the present invention are a radio frequency front-end transmission module, a chip, and a communications terminal. In the radio frequency front-end transmission method, an output matching circuit of at least one transmission channel is connected to a switch unit, and is connected to a radio frequency transmission path by using the switch unit; an output matching circuit of another at least one transmission channel is directly connected to the radio frequency transmission path. By means of the present invention, a matched transmission channel can be selected according to different frequency bands in different modes, and a control unit controls on and off of a corresponding amplification unit and the switch unit, to implement output of radio frequency signals of different frequency bands in different modes.

Abstract: An anti-electromagnetic interference radio frequency module and an implementation method therefor. The anti-electromagnetic interference radio frequency module comprises a radio frequency module body, the inside of the radio frequency module body is provided with an electrical connection area (1) and a grounding area (2), a metal thin film structure (4) is attached to an upper surface and side surfaces of the radio frequency module body, and the metal thin film structure is connected to the grounding area, forming an anti-electromagnetic interference shielding layer structure which is integrated with the radio frequency module body. The radio frequency module achieves an anti-electromagnetic interference effect by means of the anti-electromagnetic interference shielding layer structure, so that electromagnetic interference generated around the radio frequency module is effectively isolated, thereby improving the performance of the radio frequency module.

Abstract: Disclosed in the present invention are a radio frequency power amplifier based on current detection feedback and a chip. The radio frequency power amplifier comprises multiple stages of amplifier circuits and at least one current detection feedback circuit; the input end of the current detection feedback circuit is connected to the input end of a current stage of amplifier circuit among the multiple stages of amplifier circuits by means of a corresponding resistor, and the output end of the current detection feedback circuit is connected to the input end of at least one stage of amplifier circuit prior to the current stage of amplifier circuit. The current detection feedback circuit generates, according to the detected quiescent operating current of the current stage of amplifier circuit, a control voltage varying inversely with the quiescent operating current, so that the current detection feedback circuit outputs current varying positively with the control voltage.