本論文研究900MHz~2.4GHz無線功率傳輸之半波與全波整流天線的設計。整體系統包含:(一)PIFA天線,(二)平衡與非平衡轉換器、匹配網路、半波與全波整流電路與射頻蕭基特二極體組成之射頻能量轉直流電源電路,與(三)DC-TO-DC Charge-Pump升壓電路。 實驗結果顯示本論文所研製系統在2.45GHz的輸出電壓最高可以達到8.48V(不含天線)。不含天線,負載電阻為470Ω,輸入功率為12dBm時,整流電路的轉換效率為最高的88.24%,含天線測試的最高轉換效率則約為85.75%。900MHz的輸出電壓最高可以達到8.41V(不含天線)。不含天線,負載電阻為470Ω,輸入功率為12dBm下,整流電路的轉換效率為最高的89%,含天線測試的最高轉換效率則約為79.32%。
This thesis studies the design of half-wave and full-wave rectennas for 900MHz~2.4GHz wireless power transfer. The overall system consists of: (1) PIFA antenna, (2) RF energy-to-DC power supply circuit consisted of balanced and unbalanced converter, matching network, half-wave and full-wave rectifier circuit and RF Schottky diode, and (3) DC-TO-DC charge-pump boost circuit. Experimental results show that the overall system developed can reach a dc output of 8.48V (without antenna) at 2.45GHz. With a load resistance of 470Ω and an injected power of 12dBm, the peak conversion efficiency is 88.24% with antenna and 85.75% without antenna. The 900MHz dc voltage output can reach up to 8.41V (without antenna). With a load resistance is 470Ω and an injected power of 12dBm, the peak conversion efficiency is 89% with antenna and 79.32% without antenna.