Zierhofer C M, Hochmair E S
Inst. of Experimentalphysik, Angewandle Physik, Universitaet Innsbruck, Austria.
IEEE Trans Biomed Eng. 1990 Jul;37(7):716-22. doi: 10.1109/10.55682.
This paper presents a new approach for transmitting RF power and signal via an inductive link. Such an approach optimizes the power efficiency of the overall transmission scheme comprising the power amplifier plus the inductive link. Power amplification is based on the single ended class E concept. The power amplification stage is self oscillating, the oscillation frequency thus being influenced by the coupling of the coils. The resulting operating frequency offset yields an improved power transmission performance of the circuit since the oscillation frequency tracks the absolute transmission efficiency maximum. A detailed analysis is given. Realization of the described approach requires a minimal number of circuit components. Experimental and theoretical results are in good agreement.
本文提出了一种通过电感链路传输射频功率和信号的新方法。这种方法优化了包括功率放大器和电感链路在内的整个传输方案的功率效率。功率放大基于单端E类概念。功率放大阶段是自振荡的，因此振荡频率受线圈耦合的影响。由于振荡频率跟踪绝对传输效率最大值，由此产生的工作频率偏移提高了电路的功率传输性能。给出了详细分析。实现所描述的方法所需的电路元件数量最少。实验结果与理论结果吻合良好。
