ASTM D4935 Fabrics Electromagnetic Radiation Resistance Performance
Tester
Scope of Application
Testing of electromagnetic shielding effectiveness for
electromagnetic shielding materials such as textiles, plastic
sheets, metal sheets, non-conductive material surface coatings or
layers, metal meshes, conductive films, conductive glass, and
conductive medium plates (using flange coaxial method).
Compliant with standards
GB/T25471, GB/T23326, ASTM D4935, QJ2809, SJ20524, etc.
Instrument features
1. The instrument adopts the coaxial testing method, which has
excellent transmission characteristics and high testing accuracy.
2. It can perform full-frequency scanning, list scanning and
point-frequency measurement;
3. The shielding effectiveness of the material is measured using
the flange coaxial testing method. This method has good
transmission characteristics and significantly improves the testing
accuracy.
4. The transmission and reception of control signals are fully
automatic. Data collection and processing are carried out
automatically. The curve display is provided by the LCD screen. The
test data can be printed by the micro printer. The operation is
very simple.
5. By calculating based on the measured parameters, an evaluation
of the absorption and reflection performance of the planar material
towards electromagnetic waves is obtained;
6. RS232 data interface, with computer software for curve display,
data analysis and storage;
7. Provide a USB interface, supporting the use of USB flash drives
for mobile data storage.
Technical Specification
1. Signal source: 1.1 Test frequency range | 300 KHz - 3000 MHz |
1.2 Frequency Stability | ≤ ± 5×10^-6 |
1.3 Frequency resolution | 1 Hz |
1.4 Signal purity | ≤ -65 dBc/Hz (offset at 10 KHz) |
1.5 Output level | -45 dBm to +10 dBm |
1.6 Voltage accuracy | ≤ ± 1.5 dB (25℃ ± 5℃, -45 dBm - +5 dBm) |
1.7 Harmonic suppression ratio | ≥ 30 dB (1 MHz - 3000 MHz), ≥ 25 dB (300 KHz - 1 MHz) |
1.8 Directionality | ≥ 50 dB (after vector calibration) |
1.9 Power Scan | -8 dBm to +5 dBm |
1. System impedance | 50 ohms |
2. Receiver: 2.1 Frequency Range | 300 KHz - 3000 MHz |
2.2 Resolution Bandwidth | 100 Hz - 20 KHz |
2.3 Dynamic Range | ≥ 95 dB (RBW = 1 KHz) |
2.4 Maximum Input Level | +10 dBm |
2.5 Input Damage Level | +20 dBm (DC +25V) |
2.6 Port: Return Loss | ≤ 1.2 |
3. Phase Characteristics: 3.1 Phase resolution | 0.01° |
3.2 Phase trajectory noise | 0.5° @ RBW = 1 kHz, 1° @ RBW = 3 KHz (25℃ ± 5℃, 0 dBm) |
4. Transmission and Reception Frequency: 4.1 Transmission frequency | 20 MHz - 1.3 GHz |
4.2 The emission frequency drift | less than 1000 Hz |
4.3 Transmission Frequency: The minimum frequency jump interval | 1 MHz |
4.4 The transmission output power | greater than 13 dBm |
4.5 Reception power dynamic range | +5 dBm to 55 dBm |
4.6 Receiver Power Accuracy | ± 1 dB |
4.7 Resolution; Receiver frequency test range | 0.01 dB; 10 MHz - 3 GHz |
4.8 Double-layer shielding effectiveness | > 20 dB |
5. Sample size: 5.1 Circular | Diameter 180mm - 200mm |
5.2 Square | 180mm × 180mm - 200mm × 200mm |
5.3 Sample thickness | 0 - 5 mm |
6. Instrument Specifications: 6.1 Working environment temperature
and humidity | 0 - 40℃, 0 - 75% RH |
6.2 Power Supply | AC 220V ± 30V, 50Hz, 100W |
6.3 Dimensions (excluding the computer) | 70mm × 50mm × 75mm (L × W × H) |
6.4 Weight | Approximately 75 kilograms |
