本揭露多个实施例可以产生和发送多个功率波，其中上述功率波的多个物理波形特征(例如，频率、振幅、相位、增益、方向)导致其收敛至一传输区中之一预定位置而产生一能量袋。关联于一电子设备的多个接收器系由无线充电系统所供电，并可以从上述能量袋提取能量，接着转换上述能量为用于关联于一接收器的上述电子设备的可使用电力。上述能量袋可以表现为一三维空间(例如，传输区)，且位在上述能量袋内或附近的一接收器可以获取在上述三维空间的能量。

Embodiments disclosed herein may generate and transmit power waves that, as result of their physical waveform characteristics (e.g., frequency, amplitude, phase, gain, direction), converge at a predetermined location in a transmission field to generate a pocket of energy. Receivers associated with an electronic device being powered by the wireless charging system, may extract energy from these pockets of energy and then convert that energy into usable electric power for the electronic device associated with a receiver. The pockets of energy may manifest as a three-dimensional field (e.g., transmission field) where energy may be harvested by a receiver positioned within or nearby the pocket of energy.