Regulations for Administration of Base Stations of Mobile Communications Network Businesses Article 14
The height and direction of an OBS antenna shall be limited according to the maximum RF output power from its transmitter; it shall be ensured that no legitimate buildings higher than the antenna within the following distances from the front direction of the antenna:1.For those base stations transmitting more than 7.94 Watts: 15 meters.2.For micro cell base stations (1.26 ~ 7.94 Watts): 8 meters.Base stations whose antenna input RF power is more than 2W must not be installed with antennas designed for the coverage of outdoor radio waves inside a building.
中文原文 行動通信網路業務基地臺設置使用管理辦法第14條
室外基地臺天線之設置高度及方向，按基地臺發射機最大射頻輸出功率區分，應確保其水平方向正前方於下列距離內不得有高於天線之合法建築物：
一、大於七點九四瓦特者：十五公尺。
二、微型基地臺：八公尺。
基地臺天線輸入端之射頻功率大於二瓦特者，其為室外電波涵蓋所設置之天線不得架設於室內。
一、大於七點九四瓦特者：十五公尺。
二、微型基地臺：八公尺。
基地臺天線輸入端之射頻功率大於二瓦特者，其為室外電波涵蓋所設置之天線不得架設於室內。