A formula is given for the maximum gain of a class of antennas having fields expressible as a finite number of spherical wave functions. This maximum gain can be achieved for arbitrarily polarized radiation fields, and it can be related to antenna size by requiring the near fields to be smal...
In subject area: Physics and Astronomy Antenna gain is the measure of how effectively an antenna can concentrate and transmit signals in specific directions, and it can be approximated using the half-power beam-widths measured in the two principal planes. ...
a由阿尔公式可知,地层因素F可表示为 May know by the Ahl formula, formation factor F may be represented as[translate] aIf you double the frequency, the gain of an antenna will quadruple. 如果您双重频率,天线的获取将变成四倍。[translate]
The LNA is placed at the front end of the receiver as discussed in Chapter 3. The intent is to place the LNA as close to the antenna as possible and hence drive down the noise figure of the receiver, maximize the desired signal's SNR, while at the same time amplify the incoming weak...
A planar antenna including a radiating plate, a ground plate and a support with the radiating plate being dimensioned according to the formula L>L/2>W, where L and W are the length and width of said radiating plate, respectively. The support serves to maintain the radiating plate and the ...
aWe are more interested in gain than in getting a perfect axial ratio – As an example, if we have a choice between 1dB Axial with 9dB of gain and an antenna with a 2dB axial ratio and 10dB of gain – we will take the second (2dB Axial Ratio and 10 dB of Gain). See attached...
An optimal tradeoff formula between diversity gain and multiplexing gain was derived. The formula is a step decreasing and right continuous function,and the number of steps is equal to the number of receiving antennas. The diversity gain is relative to the block length, and can amount to the ...
Formula for calculating the RSSI of the AP (that is, the uplink signal): Uplink signal power = STA transmit power + STA antenna gain – Space loss + AP antenna gain According to the preceding formulas, the AP antenna gain is both added to the...
References in periodicals archive? Next, the Friis power transmission formula [23] was used to calculate the maximumantenna power gain(in the central forward direction of the antenna): By substituting the measured [absolute value of [S.sub.21]] into (9), the measured maximumantenna power gain...
1.The formulae of follower linear displacement error,extra velocity and acceleration increasements were derived.给出了由滚子半径误差和凸轮轮廓几何误差引起的从动件位移误差、附加速度增量和加速度增量的计算公式。 6)plus of speed controller速度控制器增益 1.Three factors of influencing rotation speed fluctua...