本論文為研究應用於生醫上的無線傳能系統，大致上可分為兩部分，第一部分為無線傳能系統在遠場的應用—整流天線設計；第二部份則是無線傳能系統在近場的應用—電感耦合式傳能電路設計。
在第一部份，我們將探討無線傳能系統的關鍵元件—整流天線的設計。整流天線包含了遠場天線以及整流電路。利用2.45GHz迴路天線做為能量的接收並與整流電路連接成一個在低功率下有良好靈敏度的整流天線。當負載電阻為6Kohm且輸入功率為11dBm時可得到最佳化的效率為59.4%，輸出電壓為6.7V 。
第二部份則為近場天線的應用，利用兩組線圈來做磁場耦合，設計成一無線傳能系統，其中包含外部電路，也就是功率放大器；與可植入式電路，整流電路與充電電路。在這裡我們利用IRF540 MOSFET與繞線電感製作E類的功率放大器，而接收端利用繞線電感加上一電容使其產生諧振頻率在1MHz，作為接收天線。在距離為10mm時可在負載電阻端得到直流電壓46.3伏以及整體效率31%。
由於要適用於人體植入，所以電子裝置必須要能夠縮小體積。在這裡我們採用微機電技術，在矽晶圓和玻璃上製作微型電感，作為接收天線使用。我們所製作的微型電感線寬為50um，最外圈邊長為10mm，圈數為10。在量測能量傳遞時可在負載電阻端得到1.8伏的電壓。
最後，我們將討論利用遠場或近場設計的無線傳能系統的優缺點以及利用微機電技術製作電感耦合線圈的可行性和與CMOS積體電路整合的可行性。

A design of wireless powering system (WPS) for biomedical application is presented in this thesis. The article is composed of two major topics. One is the WPS design in far-field application. The other is the WPS design in near-field application.
First, we studied the WPS design in far-field applications which the key component is rectenna. Rectenna contains two units, far-field antenna and rectifier circuit. A 2.45 GHz loop antenna is designed to receive energy and integrated RF rectifier with a good sensitivity in low power application. The optimum RF-to-DC conversion efficiency is 59.4% at 11 dBm input RF power as well as 6.7 V output DC voltages on a 6 KΩ load resistance.
Second, the study of the WPS design in near-field application is presented. Here we adopt coils for power transmission by inductive coupling. It contains external circuit design—power amplifier design, and the receiver for implantable circuit design—LC-tank resonator, rectifier and charge circuit. The class-E power amplifier was designed by using IRF540 MOSFET and coils. In the implantable circuit, the coil and capacitor made up a resonator at 1MHz as receiving antenna. At the distance is 10 mm, we can get DC voltage is 46.3 V on load resistor and total efficiency is 31%.
In order to apply WPS to human implantable devices, the miniaturized devices are needed. The MEMS (Micro electric Machine System) coils are fabricated on the silicon wafer and glass here as receiving implanted antenna. The line-width, side, and turns of proposed micro-machined coil is 50 um, 10 mm and 10. In the measurement of energy transmission, we could get DC voltage at resistor is 1.8V.
Finally, we will discuss the excellences and defects of WPS in far-field and near-field design as well as the feasibility of using MEMS technique to fabricate coil for inductive coupling while combining them with CMOS integrated circuit.

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