 | |||
|
This facility is used to evaluate the conduct radiowave performance of spacecraft, properties tests of antennas and radiowave sensors, and measure their radiowave characteristics. This facility consists of two chambers. One is an anechoic chamber comprising an RF-shielded class 100,000 clean room capable of measuring the interference and the overall performance. Two measuring systems are available in this chamber : a far-field measurement system with distance between transmitting and receiving equipment of 24.6m and a compact range system (simulates far-field measurement within a limited space by using a reflector). The second anechoic chamber is open on one side for radiowave tests of large antennas. It works with an outdoor mobile collimation tower, and thus field tests are possible up to a distance of 450m. | |||
 |
 |
|||
 |
 |
||
 |
|||
 |
| Compact Range System | ||
| Location | 1st Anechoic Chamber | |
| Test area | Horizontally cylindrical space of 3.6m (dia) x 3.6m (L) | |
| Test-area properties | Amplitude Taper | Within 1.0dB |
| Total Phase Variation | Less than 10°(1GHz∼18GHz), Less than 20° (18GHz∼94GHz) | |
| Frequency Range | 1GHz∼94GHz | |
| Far-Field Measurement System | |||
| Location | 1st Anechoic Chamber | 2nd Anechoic Chamber | |
| Test area | Spherical space of 6m dia. Centered at a point 11m above the center of the rotating table | - | |
| Dimension of anechoic room | 39.2 (D) x 24.5 (W) x 22.4 (H) m | 11 (D) x 11 (W) x 12 (H) m | |
| Distance between Transmitting and Receiving Equipment | 24.6m fixed | max. 490m | |
| Radiowave Absorption property | 450MHz ∼ 10GHz or more -22dB ∼ -45dB or less | 400MHz ∼ 40GHz -25dB ∼ -40dB | |
| Shield property | For electric field : 90kHz ∼ 30GHz -80dB ∼ -60dB | - | |
| Frequency Range | 450MHz ∼ 26.5GHz | 1770MHz ∼ 33.88GHz | |