台灣中部地區電視頻段(超高頻/特高頻)電波場強量測與預測

Abstract

本論文參考美國聯邦通訊委員會的量測方法，量測台灣中部地區 VHF/UHF 電視頻段之電波場強，並與FCC及CCIR模式預測值做比較。此外，並利用 幾何光學及刀刃繞射理論，建立電波傳播之理論模式，來與量測值做比較 。由各種模式預測值與量測值比較可知，在VHF波段，FCC及CCIR模式預測 準確度相仿，與量測值較理論模式為接近；在UHF波段，傳播理論模式預 測值明顯比FCC及CCIR模式更接近量測值。 In this report, field strength measurements of TV-Band (UHF/VHF) propagation in the middle region of Taiwan have been conducted. The measurement procedure follows FCC's regulations. Meanwhile, a theoretical model, based on geometric optics and knife-edge diffraction theory has been developed. By comparing the measured field strength with that precdicted by FCC's, CCIR's or the theorectical model, it shows that FCC and CCIR have better predicting accuracy in the VHF band and the theoretical model is more accurate in the UHF band.