Radio Frequency Testing

1、 Necessity of testing 
As a high-frequency network device, routers must undergo EMC testing to verify their performance in electromagnetic environments 
Ensure that wireless signals (2.4GHz/5GHz/6GHz) do not interfere with other devices 
Verify the ability to resist external interference (such as Bluetooth, microwave radiation) 
Meet global access standards (FCC/CE/VCCI) 

2、 Core testing projects 

（1） Electromagnetic interference (EMI) testing 
Conducted harassment test 
Frequency band: 150kHz-30MHz 
Object: Power cord, Ethernet cable, USB interface 
radiation test  
Frequency band: 30MHz-6GHz (covering Wi Fi 6E frequency band) 
Key points: antenna radiation, PCB high-frequency noise 
Harmonic current test 
Standard: IEC 61000-3-2 

（2） Electromagnetic Immunity (EMS) Test 
Electrostatic discharge immunity 
Standard: IEC 61000-4-2 
Level: Exposure to ± 8kV/air ± 15kV 
Radio frequency radiation immunity 
Standard: IEC 61000-4-3 
Field strength: 3V/m (80MHz-6GHz) 
Electric fast transient pulse train 
Standard: IEC 61000-4-4 
Intensity: Power line ± 2kV, signal line ± 1kV 
Surge immunity 
Standard: IEC 61000-4-5 
Pulse: Differential mode ± 1kV, Common mode ± 2kV 

3、 Test the entire process 
Step 1: Preliminary Preparation 
Confirm target market standards (such as FCC Part 15/EN 303 528) 
Prepare technical documents: circuit diagram, RF parameters, antenna specification sheet 
Step 2: Sample Configuration 
Provide 3 complete machines (including antennas and adapters) 
Configure maximum load state (such as concurrent transmission of multiple devices) 
Step 3: Laboratory testing 
Radiation testing in an anechoic chamber 
Conducting conduction and immunity tests in shielded rooms 
Key issues recorded: Wi Fi disconnection, data loss 
Step 4: Rectification Measures 
Excessive conduction: Add power filter or magnetic ring 
Radiation exceeding standard: optimize antenna isolation and add shielding cover 
ESD failure: Add TVS tube to interface 

4、 Key precautions 
Antenna design: Ensure impedance matching of 5GHz/6GHz antennas 
Grounding strategy: Adopt layered grounding to avoid digital/analog signal crosstalk 
Standard update: Follow EN 303 528 v2.1.1 to add Wi Fi 6E requirements 

5、 Professional advice 
Pre scan testing: Use near-field probes to locate interference sources during the development phase 
Laboratory selection: Priority given to institutions with A2LA/CNAS qualifications 
Technical Support Router EMC Testing Service Contact Deng: 13925591357 Provided: 
Free Pre Test Plan 
Multi country certification one-stop support 
Urgent testing channel