Product No: AC-3M
Anechoic Chambers includes the semi-anechoic chambers and full-anechoic chambers. They are sealed shielded facilities used to simulate open-field environments for Electromagnetic Interference (EMI) and Electromagnetic Susceptibility (EMS) testing. Their main structure consists of two parts: The shielded chamber which includes the shielding shell, shielding door, ventilation waveguide windows and various power filters; The absorbing material which mainly composed of ferrite sheets and conical carbon-containing sponge absorbing material. The dimensions of the anechoic chamber must be determined based on the external dimensions of the equipment under test (EUT) and the testing requirements such as the 3-meter method and the 5-meter method.
The AC-3M/AC-5M semi-anechoic chamber is a six-sided shielded box, with absorbing material laid on only five sides, and the conductive floor is not covered. This design can simulate the environment of an ideal open field with an “infinitely large, well-conducting ground plane.” Because there is no absorbing material on the ground, a reflection path is formed during testing, and the signal ultimately captured by the receiving antenna is the superposition of the direct path signal and the reflected path signal.
The AC-3MF/AC-5MF full-anechoic chamber utilizes absorbing materials on all six interior surfaces to significantly reduce interference from external electromagnetic waves on test signals. Furthermore, the absorbing materials weaken reflections from the walls and ceiling, minimizing the impact of multipath effects on test results, thus simulating a free-space environment. Compared to semi-anechoic chambers, the anechoic chamber minimizes reflection interference from the floor, ceiling and walls.
LISUN Anechoic Chamber Design
Specifications:
| LISUN Model | AC-3M | AC-3MF | AC-5M | AC-5MF |
| Product Name | Semi-Anechoic Chamber | Full-Anechoic Chamber | Semi-Anechoic Chamber | Full-Anechoic Chamber |
| Darkroom External size (L*W*H) |
9.5*6.5*6.5m | 12.5*8.5*7.5m | ||
| Quiet Zone and Test Distance | QZ=ø2.0m at 3.0m test distance | QZ=ø3.0m at 3.0m & 5.0m test distance | ||
| Test frequency range | 9kHz/30MHz~18GHz | |||
| Types and installation of absorbing materials |
Semi-Anechoic Chamber AC-3M/AC-5M: All surfaces except the ground are covered with ferrite tiles + 300/500mm EPP hybrid absorbers; 9/12㎡ of movable absorbing material is added to the ground. Full-Anechoic Chamber AC-3MF/AC-5MF: All six surfaces: ferrite tiles + 300/500mm EPP hybrid absorbers. |
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| Flame resistance rating of Absorbing Materials |
UL94 V-0 Level，EN 13501-1/DIN 4102 A2 Level | |||
| Shielding Performance | Magnetic Field: 10kHz ≥80dB, 100kHz ≥100dB, 1MHz ≥100dB; Plane Wave 100MHz ≥110dB, 400MHz ≥110dB; Microwave: 18GHz ≥90dB |
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| Normalized Site Attenuation | NSA: ±3.5dB (30MHz to 1GHz) | |||
| Site Voltage Standing Wave Ratio |
sVSWR: +5.5dB (1GHz to 18GHz) | |||
| Field Uniformity Deviation | 0dB/+6dB at 75 % of 16 measuring points (26/80MHz to 18GHz) | |||
| Electrical System | LED lights, distribution boxes, switches, sockets, cables and conduits, etc. | |||
| Ventilation System | It adopts a honeycomb structure, with size of 400*400mm, and includes an air conditioning interface flange. | |||
| Monitoring System | Withstands 100V/m electric field strength: CCTV high-definition camera, color LCD monitor | |||
| Ground Power Interface Box | Dimensions: 300*300*200mm, includes one 220V/10A socket and one 380V/16A interface. | |||
| Wall Adapter Plate | Dimensions: 300*300mm, including 6 N-N tubes, 2 SMA-SMA tubes, and 2 waveguides with an inner diameter of 35mm. | |||
| Filters | Telephone filter, network filter, power supply filter, single-phase power supply 32A and three-phase power supply 32A (voltage consistent with the national Grid). | |||
| Other decoration materials | White reflector on the wall | |||
| Operating Environmental | 15℃~30℃, relative humidity ≤75% (no condensation) | |||
| Earthquake Resistance Level | Level 8 | |||
| Standards | IEC 61000-4-3，IEC 61000-4-20，CISPR 16-1-4，ANSI C63.4，MIL‑STD‑461G，MIL‑STD‑285，GJB Standards | |||
| Test Applications | EMI/EMS testing for consumer electronics, small household appliances, and small industrial equipment | EMI/EMS testing for automotive electronics, large industrial equipment, and communication terminals. | ||
Required and Option System Configurations:
| Required configuration: Schielding Door |
LISUN model AC-DR1.5X2P: Pneumatic shielding door size is 1.5*2m. (option: AC-DR2X2P Pneumatic shielding door size is 2*2m; AC-DR3X3A Fully automatic shielding door size is 3*3m; AC-DR4X4A fully automatic shielding door size is 4*4m) | |||
| Option Configuration 1: Test Turntable |
LISUN model AC-TT3M1.5D0.5T: Turntable diameter 1.5 meters, max load 500 kg, 0°~360° continuous rotation, accuracy ±1°. (option: AC-TT3M2D1T turntable diameter 2 meters, max load 1000 kg; AC-TT5M3D2T turntable diameter 3 meters, max load 2000 kg; AC-TT5M3D5T turntable diameter 3 meters, max load 5000 kg) | |||
| Option Configuration 2: Antenna Tower |
LISUN model AC-AT4MS: Single-axis antenna tower, 4-meter height electrically raised, includes controller for tower and turntable operation. (option: AC-AT4MD dual-axis antenna tower, 4-meter height electrically raised, adjustable pitch angle) | |||
| Option Configuration 3: Control Room |
LISUN model AC-CT3M: External size is 3*4*3m (option: AC-CT5M, 4*5*3m). Designed for housing and testing all EMI and EMS testers. The shielded door is 1.2*2m and includes the electrical system, ventilation system, ground power interface box, wall interface panel and filters. | |||
| Option Configuration 4: Amplifier Room |
LISUN model AC-PA3M: External size is 3*2*3m (option: AC-PA5M, 4*2.5*3m). Used to shield high-power amplifiers from electromagnetic interference and radio frequency radiation, protecting test personnel and equipment. The shielded door is 1.2*2m and includes the electrical system, ventilation system, ground power interface box, wall interface board and filters. | |||
Notes:
1. The maximum size of the device under test (DUT) is determined by the size of the shielding door and the size of the quiet zone (QZ);
2. LISUN can customize semi-anechoic chamber or full-anechoic chamber of other sizes according to customer requirements.
AC-3M/AC-3MF Anechoic Chamber Layout Design
AC-5M/AC-5MF Anechoic Chamber Layout Design
EMC includes EMI and EMS
Typical Application 1: Anechoic Chamber is used for Electromagnetic Susceptibility (EMS) of Radiated Susceptibility (RS, or Radiated Immunity) Full-Compliance Test (LISUN model: AC-EMS)
The Anechoic Chamber works with signal source, power meter, Isotropic E-Field Sensor and power amplifier can fully meet the IEC 61000-4-3, GB/T 17626.3 and GB/T 17215 standard for Electromagnetic Susceptibility (EMS) of Radiated Susceptibility (RS) Full-Compliance Test.
| LISUN Model | Product Name | Product Specifications |
| LS-SMB100B | Signal Generator | 9kHz~6GHz, AC power- AC adapter |
| LS-GLJ06G | Power Meter | 9kHz~6GHz (need 2 sets: Forward and Reverse Power Meter) |
| LS-PB60 | Field Strength Probe & Monitor | 1MHz~6GHz, 600V/m |
| LS-PA80M1G-300W | Power Amplifier | 80MHz~1GHz, Rated output power ≥300W with alarm function, 5U chassis |
| LS-PA1G6G-120W | 1GHz~6GHz, Rated output power ≥120W with alarm function, 4U chassis | |
| LS-9128ESP | Stacked Log Periodic Antenna | Frequency: 30MHz~1GHz; maximum output power 3kW; input impedance 50Q;VSWR<1.5:1 |
| LS-9120D | Double Ridged Broadband Horn Antenna | Frequency: 1GHz~8GHz, gain 6~17dBi, power 200W, standing wave ≤2.5 |
| CASE-19 | Cabinet | Install the above instruments in a cabinet for a neat and professional appearance, with easy and convenient operation. |
| LS-SOFT61000-3 | Software | Design according to IEC/EN 61000-4-3 by LISUN |
| PC-3 | PC with Windows System | ACER or similar brands computer with monitor |
| LS-SW03 | RF Switch (Option) | Easy to switch between 2 or 3 sets of Power Amplifiers. 3 Channels. Connector: SMA. Impedance: 50 ohms. Frequency range: DC-6 GHz. Lifespan: 1,000,000 cycles |
EMS Radiation Susceptibility Testing System
Typical Application 2: Anechoic Chamber is used for Electromagnetic Susceptibility (EMS) of Conducted Susceptibility (CS, or Conducted Immunity) Full-Compliance Test (LISUN model: RFCI61000-6)
The Anechoic Chamber works with LISUN RFCI61000-6 RF Conducted Immunity Test System together can be certified in according with IEC 61000-4-6, EN 61000-4-6 and GB/T 17626.6.
RFCI61000-6 RF Conducted Immunity Test System
Typical Application 3: Anechoic Chamber is used for Electromagnetic Interference (EMI) of Conducted Emission (CE) and Radiated Emission (RE) Full-Compliance Test (LISUN model: AC-EMI)
The Anechoic Chamber works with the R & S receiver system together can be certified in according with the IEC 61000-3-2, IEC 61000-3-3, IEC 61000-6-4, CISPR 11, CISPR 14, CISPR 16-1-4, CISPR 16-2-3, CISPR 20, CISPR 22, CISPR25 and CISPR 32.
| LISUN Model | Product Name | Brand | Specification |
| ESRP 7 | EMI test receiver | R&S | Compliant with CISPR 16-1-1 and Full-Compliance Test 9 kHz to 7.2 GHz (optional ESRP 3: 9 kHz to 3.6 GHz). |
| ENV 216 | Artificial power | R&S | Frequency range: 9 kHz to 30 MHz. Max.16 A power processing capacity (different due to national/region) simulation impedance (50 μH + 5 ω) || 50 ω, in line with CISPR 16-1-2 V-shaped network conforms to CISPR, EN, EN, EN , VDE, ANSI, FCC Part 15 and MIL-STD-461 have been calibrated according to CISPR 16-1-2 |
| VTSD 9561 F-N | Diode Pulse Limiter | SCHWARZBECK | Diode Pulse Limiter +10 dB Attenuation ,fuse lamp,input Nfemale,output N-male. |
| VULB 9168 | TRILOG Breitband Antenne | SCHWARZBECK | TRILOG Super Broadb. Test Antenna, (25) 30-1000 (2000) MHz, 10W, reduced width, diameter < 1.5 m. |
| BBHA 9120D | Double Ridged Broadband Horn Antenna | SCHWARZBECK | Broad-Band Horn Antenna (0,8) 1-18GHz，N-connector |
| CASE-19 | Cabinet | LISUN | Install the above instruments in a cabinet for a neat and professional appearance, with easy and convenient operation. |
| LS-E3-EMI | Test lines, software and system integration | LISUN | Custom high -frequency cable, EMI test software, equipment debugging and installation, training. |
| PC-3 | PC with Windows System | ACER | or ACER similar brands computer with monitor |
Typical Application 4: Anechoic Chamber is used for automotive electronics of Bulk Current Injection (BCI) Full-Compliance Test (LISUN model: LSBCI-40)
The Anechoic Chamber works with LISUN LSBCI-40 Bulk Current Injection (BCI) Test System together can be certified in according with ISO 11452-4, SAE J1113/4 and GB/T 33014.4.
LSBCI-40 Bulk Current Injection (BCI) Test System
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