The antenna is an important part of the Bluetooth earphone PCB. The PCB has through and metalized vias, and the walls of the vias form a conductive layer; the antenna conductor is etched on the upper antenna conductor of the copper foil on the top of the PCB and under the copper foil on the bottom of the PCB The antenna conductor, the antenna's radiation intensity and radiation efficiency are in the optimal state, which can effectively realize the reliability and stability of the Bluetooth headset product.
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