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在磁耦合谐振的无线电能传输系统中,螺旋天线将射频能量进行发射与接收。讨论螺旋天线的几何参数与其谐振频率的关系,提出螺旋天线制作的约束条件。据此制作出两个相同的螺旋天线,用于磁耦合谐振的无线电能传输系统中的发射天线和接收天线,并在系统中进行测试。实测结果表明该组发射天线和接收天线在8 MHz谐振频率下,螺旋天线间的距离为1 m时的传输效率达77%。
In a magnetically coupled resonant wireless power transmission system, a helical antenna transmits and receives radio frequency energy. Discuss the relationship between the geometric parameters of the helical antenna and its resonant frequency, and put forward the constraints of making the helical antenna. According to this, two identical helical antennas are fabricated for the transmit and receive antennas in a magnetically coupled resonant radio power transmission system and tested in the system. The measured results show that the transmission efficiency of the transmitting antenna and receiving antenna of this group is 77% when the distance between the helical antennas is 1 m at 8 MHz resonant frequency.