短距离设备发射机如何将磁场强度测量值转换为辐射功率

Hongmei Fan
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引用次数: 0

摘要

随着近距离通信设备的快速发展,如何限制其内部发射机的电磁辐射变得至关重要。对于电感线圈发射机和电场发射机,分别讨论了近场和远场区域磁场强度到辐射功率的转换。阐明了总辐射功率(TRP)、有效各向同性辐射功率(EIRP)和有效辐射功率(ERP)这三个功率概念。目前欧洲电信标准协会(ETSI)和澳大利亚/新西兰标准tm (AS/NZS)标准中关于SRD发射机磁场强度或9 kHz至30 MHz频率范围内ERP / EIRP限制的两个问题得到了解决,推导了从磁场强度转换为EIRP的公式。
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How to Convert from Magnetic Field Strength Measurements to Radiated Power for Short Range Device Transmitters
With the rapid development of short range devices (SRD), it becomes critical to limit the electromagnetic radiation from the transmitters inside them. For both inductive loop coil transmitters and electric field transmitters, the conversion from magnetic field strength to radiated power in both near field and far field regions are discussed. Three power concepts, total radiated power (TRP), effective isotropic radiated power (EIRP) and effective radiated power (ERP) are clarified. Two concerns in current European Telecommunications Standards Institute (ETSI) and Australian / New Zealand StandardTM (AS/NZS) standards regarding SRD transmitter magnetic field strength or ERP / EIRP limits in the frequency range of 9 kHz to 30 MHz are addressed, formulae to convert from magnetic field strength to EIRP are derived.
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