Being a ratio, antenna efficiency is a number between 0 and 1. However, antenna efficiency is commonly quoted in terms of a percentage; for example, an efficiency of 0.5 is the same as 50%. Antenna efficiency is also frequently quoted indecibels (dB); an efficiency of 0.1 is 10% or (...
原文:The driven assembly will operate as a stand-alone unit. However, for optimum performance, two director arrays (P/N 2040-102 or 2040-103) can be connected to the driven assembly for a 50 percent efficiency improvement in communication. 翻译:驱动组件将作为一个独立的单位。然而,最佳的性能是...
Gain is closely related to directivity –in fact it is directly proportional to it. 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/microwa...
,EVM (error vector magnitude)是定义在讯号电压大小与相位的比值,有没有看到关键字电压振幅的大小。 https://www.litepoint.com/blog/error-vector-magnitude-why-it-matters-and-how-its-measured/ 所以以刚刚EVM 1%为例子,转换成dB就是20log(1%)=-40dB 在举一个例子,假设一个天线效率Efficiency为50%,那转...
oxide. All simulations were done with CST microwave studio software and frequency domain solver. The results indicated that the antenna's operating frequency ranges from 2 to 32 GHz. The results of the computations indicated that the antenna's peak gain and peak efficiency are 8.1 dB and 90%,...
Efficiency is a measurement of how much of the energy put into the antenna actually gets radiated into free space, rather than lost as heat on the antenna’s structure or reflected back into the source. The antenna’s impedance and VSWR at the center frequency play a big role in this meas...
antenna, and should be independent of power input. It should be noted that the gain value in Equation (17) is the effective gain of the antenna, calculated from the measured values of the AF. The TAF as used above incorporates antenna efficiency, the effect of antenna mismatch and other ...
Here η is the antenna efficiency (usually in the range from 0.60 through 0.75), A is the antenna aperture area, and λ is the wavelength at the specified frequency (λ = c/f). Notice that, in general, larger antennas have higher gain, and for a given antenna diameter (area) the gai...
Pulling these three terms together, we can see that gain can be considered a function of angle that defines a radiation pattern and accounts for efficiency (or losses) in the antenna. Array Factor for a Linear Array At this point, we’re able to predict the optimal time (or phase) delta...
Step 6 Thoroughly waterproof the lead-in area. Step 7 Install a lightning arrestor. Step 8 Connect the lead-in cable to the equipment. Suggested Cable Cisco recommends a high-quality, low-loss cable for use with the antenna. Note Coaxial cable loses efficiency as the frequency increase...