name: CFFNF
full_form: Combined Far-Field/Near-Field
context: This clause provides influence of noise simulation assumptions and results for IFF/DFF, CFFDNF, and CFFNF methodologies. The influence of noise quantifies the effect of a SNR at the TE input on EIRP measurements as outlined in [7]. For low UL power test cases, the ~1m path losses due to range length (DFF) or focal distance (IFF) yield very poor SNR conditions at the TE input. Assuming a fixed noise level at the TE input, a reduction in measurement distance/range loss will significantly improve the SNR conditions for CFFDNF and CFFNF when compared to DFF/IFF as illustrated in Figure 5.1.4.9-1. Figure 5.1.4.9-1: SNR Conditions for different test methodologies The analyses in this clause are focused on the following PC3 assumption: - For an r1=20cm CFFNF range length (distance between probe and centre of QZ), the min distance between the probe and the antenna array is dCFFNF,min= r1-12.5cm (max offset)=7.5cm - For an r1=20cm CFFNF range length, the max distance between the probe and the
description: Combined Far-Field/Near-Field (CFFNF) is a measurement methodology used in antenna testing and Over-The-Air (OTA) measurements. It combines the advantages of both far-field and near-field measurements to provide accurate results for characterizing the radiation patterns of antennas, especially in scenarios where the distance between the probe and the antenna array is critical.
explanation: CFFNF is classified as a Technology because it is a specific measurement methodology used in the field of telecommunications. It involves technical principles and processes to achieve accurate antenna characterization.
section_title: 5.1.4.9Simulation results for Influence of Noise
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