GB/T 13615-2009 in English
VALIDElectromagnetic environment protection requirements for earth stations
- Issued on:2009-05-05
- Implemented on:2010-07-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$214.00
本标准规定了地球站电磁环境干扰允许值以及干扰电平计算方法。
本标准规定了地球站电磁环境测试方法。
本标准适用于工作频段为1GHz~40GHz同步卫星通信地球站、同步气象卫星地球站以及海岸地球站。
Introduction
Interpretation of the National Standard of the People's Republic of China GB13615-2009
Background of Standard Formulation and Technical Evolution
GB13615-2009 "Earth Station Electromagnetic Environment Protection Requirements" is to regulate the electromagnetic environment of satellite communication earth stations and protect the normal operation of radio communication systems. This standard replaces the 1992 version of GB13615 and updates the technical indicators and test methods in combination with the relevant recommendations of the International Telecommunication Union (ITU).
Interference sources and allowed values
| Category | Specific interference source | Allowed value (dBm) | Test method |
|---|---|---|---|
| Digital microwave relay system | Interference caused by wireless relay system to 8-bit PCM telephone system | -30 to -25 dBm | Spectrum analysis method |
| Other network earth stations and space stations | Interference caused by satellite fixed service network transmitters | -20 to -15 dBm | Directivity pattern test method |
| Radio transmitters such as radar, broadcasting, and television | Co-frequency, harmonic, and parasitic emission interference | -10 to -5 dBm | Signal separation and filtering method |
Requirements for clearance area in front of the antenna
An open area must be maintained in front of the antenna of the earth station to ensure that there are no obstacles such as trees and buildings. The operating elevation angle of the C band is not less than 5 degrees, and that of the Ku band is not less than 10 degrees.
Actual application case analysis
A satellite communication earth station in a coastal area is interfered by medium wave broadcasting due to its geographical location. According to the standard requirements, its electric field strength should not exceed 125 dB(μV/m). By testing and correcting the spectrum analyzer readings (see Appendix C), compliance with the standards was confirmed and the antenna position was optimized.
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