3m semi-anechoic chamber

SAC-3 is a semi-anechoic chamber designed according to the 3m test distance, which is mainly composed of the main anechoic chamber, the control room and the power amplifier room (conduction test chamber can be selected), which is used for the radiated immunity test and the conformity test of radiated emissions at the 3m distance. The 3m anechoic chamber is the most popular standard test environment, with a quiet zone of up to 2m diameter, which is widely used in electromagnetic compatibility testing in IT products, household appliances, medical equipment, automobile vehicles and parts, large military electronic systems, industrial electronic systems, communication fields, etc.

Reference configuration

• Typical shield inner dimensions: 9m (length) × 6m (width) ×6m (height).

• Shielding structure: Smart Shield Twin Wall double-layer shielding structure, from the inside to the outside is high-performance composite conical absorber, ferrite, anti-corrosion multi-layer board, shielding steel plate, between two adjacent standard shielding modules with conductive shielding liner Gasket for good RF shielding and electrical contact connection.

• Standard shielding module: 3m ×1m in size, made of 2mm thick double-sided hot-dip galvanized steel sheet with two bends on four sides. The thickness of the double-sided hot-dip galvanized steel sheet is ≥2mm, and the thickness of the galvanized layer is ≥20μm, and the thickness is uniform. The modules are connected by M10 screws with a high strength mark of 8 or more.

• Absorbing structure: The wall absorbing material is composed of low-frequency absorbing material ferrite (100mm×100mm×6.7mm) composed of nickel-zinc-iron-manganese and high-performance EPP absorbing material (can be selected according to needs); Ground movable absorbers are composed of EPP absorbers and ferrite. The wall absorber can be covered with white reflectors to beautify the interior environment and increase brightness.

• Screen door: 2m×2m or 3m×3m or larger and other sizes can be selected, and special size design can also be carried out according to needs.

At the same time, it is equipped with a 0.9m×2m employee access door, which is a manual, semi-automatic and fully automatic track;

• Waveguide window: 600mm×600mm (with flange), up to 40GHz, can be selected according to needs;

• Built-in turntable: diameter of 4m, load of 3 tons, other types of turntable can also be customized according to needs;

• Raised floor: the load is 3 tons/㎡ as the heavy-duty area, and the other areas are 1 ton/㎡, and the height is generally 50cm;

• Filter: 380V, 220V, 110V, DC, etc., as well as network, communication and other signal filters;

• Antenna Tower: up to 4m high, with horizontal and vertical polarization, can be installed with various types of antennas;

• Video system: 2 sets of digital color monitoring system, one set of which is fixed on the wall and 1 set of movable floor;

• Voice system: ensure that the communication between the main dark room and the amplifier room can be unobstructed;

• Fire alarm system: adopts high-sensitivity air sampling and analysis system, which complies with the relevant regulations of the Ministry of Public Security of China on fire prevention products;

• Lighting system: halogen lighting, 1m high from the ground illumination value of 250Lux, can be lifted;

• Lifting platform: It is convenient for large objects to enter and exit the chamber, and the automatic lifting platform is customized according to the size of the chamber door;

• Cooling air system: for the normal testing of vehicles or other high-temperature products, provide a cold air strong transmission system;

Key features

• Radiated immunity test: meets the requirements of IEC/EN 61000-4-3, ISO11452 and other standards.

• Radiated emission test: Meets the requirements of EN 50022, EN 50147-2, GJB 151A and GJB 152A.

• Quiet zone size: 2 m diameter and 2 m height in the cylinder (or other sizes of quiet zone can be customized as required)

• Shielding Effectiveness: Meets standard EN50147-1, GJB12190 or better

• Normalized Site Attenuation (NSA): ±4dB, ±3.5dB, ±3dB and  3dB in CISPR16-1-4 and ANSI C63.4 within 30MHz-1GHz

• Field strength uniformity (FU): measured according to the requirements of IEC61000-4-3, within 0~6dB

• The site voltage standing wave ratio (sVSWR) is not more than 6dB in the range of 1GHz-18GHz according to the CISPR16-1-4 standard

• Ambient Background Noise (ABN): 10dB below the limit set by the CISPR22 standard