Introduction
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The beamforming element antenna is specified as a standard equation based antenna plugin in SEAMCAT.
Figure: Beamforming element antenna parameters
The input parameters and the corresponding notation as used in the following equations are:
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The element antenna can be modified by selecting Edit next to Element antenna. The other input parameters and the corresponding notation as used in the following equations are as follows
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The antenna peak gain is pre-calculated and shown for the input parameters (e.g. 23.1 dBi in Figure above). This is provided for validation purposes.
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- Pointing reference: towards the horizon
- Additional offset: Uniform distribution from -90° to +90°
Figure: Mobile station pointing settings
This is intended to reflect random user behaviour with the implementation of a UE with 2 antenna arrays pointing in opposite directions, where only the array which points towards the serving base station is active.
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Both of these options are illustrated below:
Figure: Beamforming antenna plot using "Gain envelope" mode
Figure: Beamforming antenna plot using "Full pattern" mode, with azimuth beamsteering angle set to 40 degrees
It is also possible to see the beamforming pattern on the individual event results – this can be useful to verify the gain values in a specific direction, as illustrated below:
Figure: Example of beamforming plots for interference between 2 IMT-2020 networks - ILT BS (red) to VLR UE (blue) - on the Event Results layout