LOW-LOSS WIRELESS STEREO BLUETOOTH HEADPHONES

摘要

Wireless stereo Bluetooth headphones in the technical field of communications, comprising a left Bluetooth headphone and a right Bluetooth headphone. The left Bluetooth headphone and the right Bluetooth headphone each comprise a headphone housing. A master PCB (1) having a chip and a sound-producing unit (2) are mounted in the headphone housing. A Bluetooth radio transceiver module, a power supply module (4), and an antenna module are connected to and mounted on the master PCB (1). The antenna module is connected to the master PCB (1) via a radiofrequency coaxial cable (8). The head section of the headphone housing is a sound-producing part (5), the middle section is an earhook part (6), and the tail section is an antenna part (7). When wearing the headphones, the antenna parts (7) extend rearwards and are located behind the helixes. When wearing the headphones, the antennas of the headphones can extend outwards to the posterior sulci and are not restricted by the structures of the ears themselves, thus reducing the distance between the two antennas of the left Bluetooth headphone and the right Bluetooth headphone, and at the same time reducing impedance of the head. Measurement results show that the radiofrequency path loss is 60 decibels and an improvement of approximately 20 decibels is possible, which is sufficient to provide the Bluetooth headphones with stable audio transmission.