Psiber Data Systems RF3D 5.2 Editing the Access Point/Antenna Library

manual

5.2 Editing the Access Point/Antenna Library

The antenna library, like the wall and ﬂoor library, is stored in the form of individual ﬁles

for each antenna type. These ﬁles are contained in the folder RF3DWiﬁPlanner/Anten-

nas, and can be edited with Notepad. The best way to create an antenna type is to

ﬁnd the ﬁle that deﬁnes a similar, existing type, open it in Notepad, and save it under

a new name before editing its contents.

Any antenna can be deﬁned for the 2.4 GHz band, the 5 GHz band, or both bands.

The example used in the following explanation deﬁnes an antenna for the 2.4 GHz

band only.

An antenna ﬁle describes the antenna’s radiation pattern in ter ms of its horizontal

and vertical cross-sections, as well as some additional parameters. The antenna’s ra-

diation pattern must be described for the antenna’s normal installation or ientation.

Theta (θ) represents the upward elevation angle from the horizontal plane in degrees.

Negative values indicate downward elevation. Phi (ϕ) designates the azimuth angle

in degrees — that is, the rotational angle in the horizontal plane, where positive val-

ues represent a clockwise rotation from 12 o’clock. Directional antennas should be

described so that their greatest gain is at phi=0° and theta=0°.

You can enter as many directional gain values (data points) as you want, and the

number of data points only has to be entered in a few places, as described below.

The data points you specify can also be at any angles desired, and their distribution

can vary within an antenna ﬁle. However, both the precision of the program display

and the time required to recompute and refresh the display increase as the number

of data points increases.

In computing the antenna gain, the program adds the directional gain in dBi to the

global gain (in the example, 4 dBi). This means that the directional gain value should

be normalized to 0 dBi.

Please note that the decimal point must be a period (‘.’). Note too that the tags and

values are case-sensitive.

The Type line contains the text displayed for this antenna type in the toolbox.

The TypeShort line is not currently used in the program.

You can use it for your comments.

The Gain_dB_2_4GHz line denes the antenna gain in the 2.4 GHz band.

<Gain_dB_2_4GHz>4</Gain_dB_2_4GHz>