name: FS
full_form: Free Space
context: 824 MHz in FS configuration. TRP of normalized pattern of -3.1 dB. Figure 9.2-6: Normalized antenna patterns for GSM antenna at 1800 MHz in FS configuration. TRP of normalized pattern of -4.7 dB. Figure 9.2-7: Normalized antenna patterns for Bluetooth antenna at 2450 MHz in FS configuration. TRP of normalized pattern of -4.3 dB. For beyond 3 GHz, two sets of simulation results were utilized. The first set of results were for a smartphone UE in the FS and the BHR condition, illustrated in Figure 9.2-8. Figure 9.2-8: Illustration of the simulation model for n78 patterns The 3D antenna patterns in Figure 9.2-9 using a 30 dB dynamic range. Figure 9.2-9: Simulated antenna patterns for n78 (3.5 GHz). Left: free space (FS), right: beside head right (BHR) The second set of patterns are from a smartphone prototype with the antenna placed in the corner of a device with metallic ground plane. The model is simplified and contains an LCD (glass), ground plane (PEC), camera block (PEC), opposing
description: Free Space (FS) refers to a controlled environment in telecommunications measurements where the device under test is not influenced by external factors like human proximity or surrounding objects. It serves as a reference scenario for evaluating antenna performance and radiation patterns in an idealized setting, free from multipath effects or absorption.
explanation: Free Space (FS) is not a network function, protocol, or technology but a specific condition used during telecommunications measurements to isolate the device under test and obtain accurate performance data.
section_title: 9.2Measurement grids for Anechoic Chamber method
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biotag_Description: B-Measurement,I-Measurement,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O