Beamforming antenna spacing

1. How does antenna spacing affect beamforming?
2. How far apart should antennas be?
3. How many antennas required for beamforming?
4. How far apart should mobile antennas be?

How does antenna spacing affect beamforming?

If the antenna element spacing (d) is increased above 0.5λ, the beamwidth decreases resulting in higher directivity. However, the null depth decreases as shown in Fig. 2 for d=0.7λ. When d=0.5λ, the SLL is low and the null depth is highest resulting in greatest interference suppression capability.

How far apart should antennas be?

For a system consisting of a transmitter operating at 10mW and passive omnidirectional receive antenna, a general rule of thumb is to maintain at least 3m of separation between antennas so as not to overload the input stage of the receiver.

How many antennas required for beamforming?

Used since 3G, MIMO technology lets radio signals to be sent and received using several antennas. Massive MIMO antennas have many more component antennas (around 100) that allow them to transmit radio signals more efficiently. This allows for very high data rates.

How far apart should mobile antennas be?

This simple calculation shows us that if we are deploying 2.4 GHz antennas, they should be spaced at a minimum of 4.92 inches apart as a starting point to prevent coupling or other issues.