Equation [1] is sometimes referred to as the antenna's radiation efficiency. This distinguishes it from another sometimes-used term, called an antenna's "total efficiency". The total efficiency of an antenna is the radiation efficiency multiplied by the impedance mismatch loss of the antenna, whe...
The antenna efficiency equation was derived and simulated in the target plane by Monte Carlo and Backpropagated local oscillator (BPLO) methods. Normalized CNR was defined as a measure. The antenna aperture corresponding to the maximum normalized CNR was considered optimal. We simulated the optimal ...
Gain is simply the directivity multiplied by the radiation efficiency of the antenna, . The radiation efficiency is simply the proportion of energy from the transmitter that actually gets radiated out as RF/microwave energy. Colloquially, directivity and gain are used interchangeably but there is a ...
天线辐射效率-Antenna Radiation Efficiency 3.6 弗里斯传输方程-Friis Transmission Equation Friis方程是预测视线通信链路的主要数学模型。这是一个非常基本的方程,并已扩展到包括天线的高度和TX和RX天线的差异。一旦输入了所有的常量,这个公式就非常准确了。
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Gain is simply the directivity multiplied by the radiation efficiency of the antenna, . The radiation efficiency is simply the proportion of energy from the transmitter that actually gets radiated out as RF/microwave energy. Colloquially, directivity and gain are used interchangeably but there is a ...
(TRP). In fact, when a cell phone is certified by a wireless carrier (such as AT&T, Verizon, China Mobile, T-Mobile, etc), they do not specify the antenna efficiency, but rather the TRP for the cell phone as a whole. In practical use, this is the parameter that is important, and...
but a low-efficiency antenna absorbs a large amount of power as internal losses or reflected due to impedance mismatch. In Fig.6, the average efficiency of the antenna is more than 50%, which shows that the antenna radiates the input power well throughout the frequency band and the input ...
The radiation efficiency η is defined by the ratio of the power radiated over the input power (8.135)η=PrPT=PrPr+PL. Applying Eqs. (8.131) and (8.133) to Eq. (8.135) leads to the following equation of the radiation efficiency (8.136)η=Ig2RrIg2Rr+Ig2RL=RrRr+RL=11+RL/Rr. This ...