摘要 人工電子眼的研發，可為視障者找回一絲光明，藉由電流刺激視網膜所剩餘的感光細胞，讓因感光細胞壞死而導致失明的患者得以恢復部分視覺。對於無線人工電子眼系統中，電力與訊號無線傳輸之品質為決定該系統穩健度的關鍵因素。本論文研製人工電子眼中電力與訊號無線傳輸元件及分析評估元件電磁輻射對人體之影響。電力傳輸元件設計利用線圈磁耦合原理，而訊號無線傳輸元件設計利用電磁輻射結構。電力無線傳輸元件之操作頻率為2MHz，元件藉由双線圈結構中磁場耦合的方式達到電力傳輸效果，以提供人工電子眼中系統晶片運作。訊號無線傳輸元件之操作頻帶為402~405MHz，元件經由小型化折疊型式偶極天線輻射之電磁波傳輸晶片資訊。元件電磁輻射影響經由人體組織SAR值與溫度評估，以確保元件電磁輻射對人體組織之影響在規範之安全範圍值內。 Abstract The research and development of retinal prosthesis aims for restoration of sight in patients suffering from degenerative retinal diseases such as Retinitis Pigmentosa and Age-Related Macular Degeneration. In a wireless retinal prosthesis system, the quality of the wireless power and signal transmission appears to be the key to the system robustness. In this thesis, the design and analysis of the power and signal wireless-transmission components are demonstrated. Also, the evaluation of the impact of electromagnetic radiation from the components on a patient’s head is provided. The design concept of the power wireless-transmission component is based on the magnetic coupling, while the design concept of the signal wireless-transmission component exploits the electromagnetic radiating structure. Specifically, the power wireless transmission at 2 MHz is realized using a pair of coils, and the chip signal of the frequencies from 402 to 405 MHz is transmitted through a miniaturized zig-zag dipole. The impact of the electromagnetic radiation on a patient’s head is evaluated through the simulated SAR and temperature rise of the tissues in the head. It is essential to assure that the SAR and temperature rise meet the safety requirements.
