Abstract: A radio frequency power amplifier includes: a main amplifier, a main matching circuit, an auxiliary amplifier, an auxiliary matching circuit and an impedance conversion circuit. The main amplifier is configured to output a first amplified signal. The main matching circuit is connected between the main amplifier and the combining node and is configured to adjust a phase of the first amplified signal and raise an output impedance of the main amplifier to a first impedance. The auxiliary amplifier is configured to output a second amplified signal. The auxiliary matching circuit is connected between the auxiliary amplifier and the combining node and is configured to keep a phase of the second amplified signal and raise an output impedance of the auxiliary amplifier to a second impedance. The impedance conversion circuit is connected to the combining node and is configured to raise the impedance at the combining node to a transmission impedance.

Abstract: This application provides a positioning mechanism, a flexible printed circuit, a flexible printed circuit assembly, and an electronic device. The solution includes a positioning mechanism configured to be arranged on a base. The positioning mechanism includes: at least two positioning members, arranged at intervals on the base along a length direction of the base; and a limiting member, arranged between the two positioning members, where each of the positioning members is provided with an clamping structure, two ends of the limiting member respectively extend to the clamping structures corresponding to the two positioning members, the clamping structure is configured to limit movement of the limiting member in a thickness direction of the base, and a flexible printed circuit is arranged between the limiting member and the base.

Abstract: A bracket, a module assembly, and an electronic device, so as to improve position stability of the module in the electronic device. Two first limiting parts arranged opposite to each other are arranged at two ends of the bracket, a second limiting part is arranged on at least one side of the bracket, and the two first limiting parts and the second limiting part are enclosed to form a mounting position for mounting the module. Both the first limiting parts and the second limiting part may limit the module, so as to limit in all directions and ensure position stability of the module in the bracket. The bracket is further fixed to the electronic device through fixing parts, so that the position stability of the module in the electronic device may be improved.

Abstract: A radio frequency power amplifier includes a main amplifier, a main matching circuit, an auxiliary amplifier, an auxiliary matching circuit and an impedance conversion circuit. The main amplifier is configured to output a first amplified signal. The main matching circuit is connected between the main amplifier and a combining node, including at least one-stage impedance matching circuit and is configured to adjust a phase of the first amplified signal and raise an output impedance of the main amplifier to a first impedance. The auxiliary amplifier is configured to output a second amplified signal. The auxiliary matching circuit is connected between the auxiliary amplifier and the combining node, including a multi-stage impedance matching circuit and is configured to adjust a phase of the second amplified signal and raise an output impedance of the auxiliary amplifier to a second impedance. The impedance conversion circuit is connected to the combining node.

Abstract: A bracket, a module assembly, and an electronic device, so as to improve position stability of the module in the electronic device. Two first limiting parts arranged opposite to each other are arranged at two ends of the bracket, a second limiting part is arranged on at least one side of the bracket, and the two first limiting parts and the second limiting part are enclosed to form a mounting position for mounting the module. Both the first limiting parts and the second limiting part may limit the module, so as to limit in all directions and ensure position stability of the module in the bracket. The bracket is further fixed to the electronic device through fixing parts, so that the position stability of the module in the electronic device may be improved.

Abstract: A scalable, minimum node complexity, energy efficient, and error-resilient routing method for wireless sensor networks is described. The network is partitioned into regions by power controlled base station scans using a directional antenna. Routing is performed using only local location information and instructions received from the base station at each sensor node with minimum processing and control overhead, thus allowing simple, low-cost sensor designs. Sensors in the network provide to a base station reports of the condition of the sensors themselves, and these reports are analyzed by the base station to determine improved routing instructions, which are then provided to the sensor nodes in control messages. Each data packet is relayed in an interleaved, loop-free mesh of sectors toward the base station, making data delivery robust to sensor failures and transmission errors.