name: FAR
full_form: Fully-Anechoic Room
context: relatively small devices. A practical way to determine the far field distance is needed. In [R4-168320], [R4-1700955], it was proposed to determine the testing distance based on a manufacturer declaration. One of the risks of this approach is that a distance shorter than the actual far field is chose. It should be further studied whether this could lead to underperforming devices passing the tests due to measurement inaccuracies (e.g. whether a shorter distance will lead to better measurement results than the actual far field distance). In [R4-1700531] an experimental method was proposed to determine the far field distance based on path loss measurements. This method is based on the fact that the path loss exponent is different in the near field and the far field. By measuring the path loss gradient over a certain distance, the near/far field boundary could be found. The results of an experiment conducted on a Band 3 LTE device are shown in Figure 10.2.2.4-1. The minimum far field
description: A Fully-Anechoic Room (FAR) is a specialized room designed to minimize reflections and echoes. It provides a controlled environment for accurately measuring the performance of devices, especially in telecommunications and radio frequency (RF) applications.
explanation: The description focuses on the design and purpose of a room specifically for testing and measurement purposes within the field of telecommunications. This clearly classifies it as a Testing Environment.
section_title: 10.2.2.4Far Field Criteria for the baseline measurement setup
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