The anechoic chamber was built through carefully design and
calculation, and it can provide near-field measurement conditions
for testing antennas radiation performance. This chamber can
effective eliminate outside electromagnetic interference and other
reflection interference. It can simulate free space environment
required by antenna measurement, in order to obtain reliable &
standardized test data, ensuring the accuracy of antenna
measurement.
According to the function, anechoic chamber’s main body can be
divided into near-field antenna measurement microwave anechoic
chamber and antenna measurement control room. Considering work type
and usage, we would like to choose a rectangular anechoic chamber.
Anechoic chamber’s size: 7.2m×6.5m×5.2m (net size of shielding
space)
control room’s size: 4.0m×3.5m×3.3m (No shielding requirements)
Performance of absorbing materials:
Working frequency range 0.8～5GHz
Main wall’s reflection loss ≥35dB
Other wall’s reflection loss ≥30dB
Quiet zone’s size and location: 4.6m×3m×1.0m, it is located in
front of the scanner’s probe, with its center in the vertical axis
of the chamber, and 3.2m far from the shielded board of the back
wall.
Quiet zone’s reflection level:
0.8GHz～1GHz, ≤-40dB
1GHz～3GHz, ≤-45dB
3GHz～5GHz, ≤-50dB
