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GB/T 44119-2024: Measurement method of antenna factor for 1m method radiated disturbance
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GB/T 44119-2024: Measurement method of antenna factor for 1m method radiated disturbance

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ICS 33.100 CCSL06 National Standards of People's Republic of China Radiated disturbance 1m method antenna coefficient measurement method Released on 2024-06-29 2025-01-01 Implementation State Administration for Market Regulation The National Standardization Administration issued

Table of Contents

Preface III 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Basic principles of measurement method 2 4.1 Overview 2 4.2 Antenna factor 2 4.3 Two identical antennas method 3 4.4 Three-antenna method 3 4.5 1m gain 4 4.6 Determine the 1m antenna factor 5 4.7 Use of Antenna Factors 6 5 1m gain measurement 6 5.1 Two identical antennas method 6 5.2 Three-antenna method 7 5.3 Measurement procedure 7 Appendix A (Normative) Derivation of Antenna Factors 8 Appendix B (Informative) Considerations of Measurement Uncertainty 9

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents" Drafting. Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents. This document is proposed and coordinated by the National Radio Interference Standardization Technical Committee (SAC/TC79). This document was drafted by. China Electronics Technology Standardization Institute, Beijing Daze Technology Co., Ltd., Zhejiang Nuoyi Technology Co., Ltd., Shenzhen Yangxin Technology Co., Ltd., Xiamen Hainoda Scientific Instrument Co., Ltd., China National Institute of Metrology, Beijing Radio Metrology Test Co., Ltd. Institute, Beijing University of Posts and Telecommunications, Southeast University, Ningbo Customs Technical Center, Shanghai Electric Science Research Institute, China National Accreditation Service for Conformity Assessment Center, Shanghai Institute of Metrology and Testing Technology, China Automotive Research Institute (Jiangsu) Automotive Engineering Research Institute Co., Ltd., Guangzhou Chengzhen Electronic Technology Co., Ltd. Co., Ltd., Ma'anshan Penang Electronics Co., Ltd., Nanjing Rongce Testing Technology Co., Ltd., China Automotive Research Institute New Energy Vehicle Inspection Center (Tianjin) Co., Ltd., Hangke Quality Test (Xi'an) Technology Co., Ltd., Beijing Dechen Technology Co., Ltd., Beijing Jiaotong University, Xi'an Youlai Test Technology Co., Ltd., Siemens Sensors and Communications Co., Ltd., Coal Science and Technology Research Institute Co., Ltd., Jiangsu Institute of Metrology (Jiangsu Provincial Energy Measurement Data Center), Guangdong Zhongren South China Testing Technology Co., Ltd., Beiqi Foton Motor Co., Ltd., Chongqing Shiyi Product Quality Measurement Testing Co., Ltd., Hangzhou Taiding Testing Technology Co., Ltd., Guangzhou CESI Metrology Testing Center Service Co., Ltd., China Academy of Building Research (Beijing) Testing and Certification Co., Ltd., Henan Institute of Metrology and Testing Science, Beijing Kehuan Century Electromagnetic Compatibility Technology Co., Ltd., Fertilizer Product Quality Supervision and Inspection Institute, Zhongshan Vocational and Technical College, Anhui Institute of Metrology, Shanghai Nuocheng Testing Co., Ltd., Guangdong Little Wolf Star IoT Co., Ltd., Shenzhen Ruide Communication Technology Co., Ltd. The main drafters of this document are. Cui Qiang, Fu Jun, He Peng, Liu Xiao, Li Zhipeng, Meng Donglin, Li Li, Zhou Zhongyuan, Ma Weiyu, Chen Zhengyu, Li Lijia, Ye Chang, Zheng Yimin, Yang Hongbo, Zhang Fengxian, Jin Dong, Li Jinlong, Liang Jiming, Huang Xuemei, Li Nan, Zhang Changjun, Yi Pufei, Zhang Yunlei, Li Haiyang, Ma Lin, Xiao Jianjun, Liu Yiyong, Xu Dan, Zhang Ziliang, Qi Xin, Sun Jianhui, Lu Yanhan, Wang Zetang, Liu Yang, Cai Zhengbing, Zhang Cheng, Xu Xin, Liu Wenfang, Liang Liang, Zhu Kun, Yu Hongwen, Wang Shaoqi, Cao Yang, Li Zhongjie, and Lin Hong. Radiated disturbance 1m method antenna coefficient measurement method

1 Scope

This document describes the antenna factor measurement method for radiated disturbance at a measurement distance of 1m. This document applies to biconical antennas, resonant dipole antennas, log periodic dipole array (LPDA) antennas, double-ridged waveguide horn antennas, Measurement of standard gain horn antennas, etc.

2 Normative references

The contents of the following documents constitute the essential clauses of this document through normative references in this document. For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to This document. GB/T 4365-2003 Electrical terminology - Electromagnetic compatibility GB/T 6113.106-2024 Specification for radio disturbance and immunity measuring equipment and measurement methods Part 1-6.Radio disturbance EMC antenna calibration for immunity measurement equipment

3 Terms and definitions

The terms and definitions defined in GB/T 4365-2003 and GB/T 6113.106-2024 and the following apply to this document. 3.1 Antenna A converter that converts the guided electromagnetic energy of the feed line into radiated waves in space, and vice versa. NOTE. In this document, for antennas where a balun is an essential part of their proper operation, the term “antenna” also includes the balun. [Source. GB/T 6113.106-2024, 3.1.1.1] 3.2 Antenna factor The electric field strength of a plane wave incident in the direction of the mechanical boresight (i.e., the main axis of the antenna) measured in free space is proportional to the specified load connected to the antenna. The ratio of the voltage generated on the NOTE. For more information, see 4.2.Antenna factor is also used as a general term and is denoted as AF. [Source. GB/T 6113.106-2024, 3.1.2.1] 3.3 Antenna gain The ratio of the radiated power density in a certain direction of the antenna to the average radiated power density. 3.4 Barun A device used to convert transmission lines from balanced to unbalanced or from unbalanced to balanced. NOTE 1 For example, a balun is used to couple a balanced antenna element to an unbalanced feed line (e.g. a coaxial cable). The balun may have an inherent impedance different from 1.1. Anti-transformation. Note 2.In this document, balun is also used to refer to the handle of a biconical antenna, usually in the shape of a metal tube or rod. [Source. GB/T 6113.106-2024, 3.1.1.13] ...