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Antenna Measurement Basics
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类别: 消费电子
时间:2020-01-16
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Antenna Measurement BasicsAntenna Measurement Theory Introduction to Antenna Measurement 1. Basic Concepts 1.1 ELECTROMAGNETIC WAVES The radiation field from a transmitting antenna is characterized by the complex Poynting vector E x H* in which E is the electric field and H is the magnetic field. Close to the antenna the Poynting vector is imaginary (reactive) and (E,H) decay more rapidly than 1/r, while further away it is real (radiating) and (E,H) decay as 1/r . These two types of fields dominate in different regions in space around the antenna. Based on this characterization of the Poynting vector, we can identify three major regions (Figure 1). Figure 1: Radiating Regions 1.1.1. Reactive Field This region is the space immediately surrounding the antenna. The extent of this region is 0
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  • Xutg 2021-12-01
    一共21页,从内容看,更像专业网站里的技术资料,感觉像名词解释。
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