Fabric Anti-Electromagnetic Radiation Performance Tester


The Fabric Anti-Electromagnetic Radiation Performance Tester is a precision instrument designed to measure the electromagnetic shielding effectiveness of various materials, including textiles, plastic sheets, metal foils, coatings, platings, conductive films, metal meshes, conductive glasses, and conductive medium plates. The tester employs the coaxial test method, providing high accuracy and reliable results for full-frequency, list, and point-frequency measurements.

Type: Electromagnetic shielding performance tester (coaxial method)

Application

This tester is widely used for:

Evaluating shielding performance of electromagnetic shielding fabrics for garments and protective materials.

Testing coatings, conductive films, and metal meshes for electronics, aerospace, and automotive applications.

Assessing absorptive and reflective properties of planar materials against electromagnetic waves.

Research and development of EMI/EMC compliant textiles and composite materials.

Quality control in textile manufacturing and material certification labs.

Standards

GB/T 23326 – Electromagnetic shielding textile test standard (China)

GB/T 25471 – Electromagnetic shielding material testing method (China)

ASTM D4935 – Standard test method for measuring the electromagnetic shielding effectiveness of planar materials using a coaxial transmission line

SJ2054 – Coaxial method for conductive materials (China)

Features

(1) Uses coaxial test method, ensuring high transmission characteristics and testing accuracy.

(2) Supports full-frequency scanning, list scanning, and point-frequency measurements.

(3) Automatic control of signal emission and reception, data collection, curve display, and micro-printer output.

(4) Evaluates both absorption and reflection performance of planar materials.

(5) RS232 interface for computer connection, curve display, data analysis, and storage.

(6) USB interface for mobile data storage via flash drives.

(7) User-friendly interface with automated measurement and data processing.

Technical Parameters

1. Signal Source

ParameterSpecification
Frequency Range300 KHz – 3000 MHz
Frequency Stability≤ ±5×10⁻⁶
Frequency Resolution1 Hz
Signal Purity≤ -65 dBc/Hz (10 KHz offset)
Output Level-45 dBm – +10 dBm
Level Accuracy±1.5 dB
Harmonic Suppression≥30 dB (1 MHz–3 GHz), ≥25 dB (300 KHz–1 MHz)
Directivity≥50 dB
Power Scanning-8 dBm – +5 dBm
System Impedance50 Ω

2. Receiver

ParameterSpecification
Frequency Range300 KHz – 3000 MHz
Resolution Bandwidth100 Hz – 20 KHz
Dynamic Range≥95 dB (RBW = 1 KHz)
Maximum Input Level+10 dBm
Input Damage Level+20 dBm (DC +25V)
Standing Wave Ratio≤1.2

3. Phase Characteristics

ParameterSpecification
Phase Resolution0.01°
Phase Trajectory Noise0.5° @ RBW 1 KHz; 1° @ RBW 3 KHz

4. Transmit and Receive Frequencies

ParameterSpecification
Transmit Frequency20 MHz – 1.3 GHz
Transmit Frequency Drift<1000 Hz
Minimum Hopping Interval1 MHz
Transmit Output Power>13 dBm
Receive Power Dynamic Range+5 dBm – -55 dBm
Receiver Power Accuracy±1 dB
Resolution0.01 dB
Receiver Frequency Test Range10 MHz – 3 GHz
Double-layer Shielding Effectiveness>20 dB

5. Specimen Dimensions

ParameterSpecification
Circular SpecimenDiameter 180–200 mm
Square Specimen180×180 mm – 200×200 mm
Thickness0–5 mm

6. Instrument Specifications

ParameterSpecification
Working Environment0–40°C, 0–75% RH
Power SupplyAC 220V ± 30V, 50 Hz, 100 W
Dimensions70×50×75 cm (L×W×H, excluding computer)
WeightApproximately 75 kg