In the military industry, Electromagnetic Compatibility (EMC) is a critical characteristic that ensures electronic equipment can achieve its tactical performance, maintain survivability, and ensure mission reliability in complex and harsh electromagnetic environments. The Chinese National Military Standard (GJB) serves as the fundamental basis for guiding, designing, and verifying the EMC performance of Chinese military products. Among them, GJB 151B-2013, "Requirements for Electromagnetic Emission and Susceptibility of Military Equipment and Subsystems," together with its supporting test method standard GJB 152A-1997, constitute the core technical system for the current EMC certification of our military equipment.

I. Core of the Standard System and Platform Applicability

The GJB 151B standard is highly aligned with the U.S. Military Standard MIL-STD-461 in terms of architectural framework and technical requirements, ensuring international integration of technical standards. This standard includes four major categories of test items: Conducted Emissions (CE), Radiated Emissions (RE), Conducted Susceptibility (CS), and Radiated Susceptibility (RS).

A core principle is "Platform Applicability." Not all equipment requires all tests. GJB 151B explicitly specifies the subset of test items that must be met based on the final installation platform of the equipment (such as Army ground, Navy surface ships, Navy submarines, Air Force aircraft, space systems, etc.).

II. Laboratory Core Capabilities: Over a Decade of Military Experience and Complete Qualifications

As one of the few testing institutions that simultaneously possesses the "Three Military Certifications" (Weapons and Equipment Quality Management System Certification, Confidentiality Qualification Certification for Weapons and Equipment Research and Production Units, Weapons and Equipment Research and Production License), we have established a complete EMC testing capability system based on over ten years of experience in serving the military sector:

• Advanced Test Equipment Configuration:

  • Complete set of imported test systems (e.g., German R&S, American Keysight)

  • 1 x 3-meter Semi-Anechoic Chamber (SAC)

  • 1 x Military Standard 1-meter SAC

  • 6 x Electromagnetic Shielded Enclosures

  • Over 30 sets of dedicated test systems

• Professional Software Platforms:

  • Automated Test Management System

  • Data Acquisition and Analysis Software

  • Dedicated Simulation Calculation Tools

  • Test Report Auto-generation System

III. Complete Implementation Capability for GJB 151B Test Items

The table below lists the main GJB 151B test items for which our laboratory possesses complete testing capabilities:

IV. Core Testing Dimensions and Military Reliability Requirements

Based on over a decade of engineering experience, we provide professional services in the following dimensions:

1. Full Spectrum Testing Capability:

   • Frequency range coverage from 25 Hz to 40 GHz.

   • Possesses capabilities for various waveforms including transient and steady-state.

   • Supports multi-dimensional analysis in time and frequency domains.

2. Multi-Path Coupling Analysis:

   • Comprehensive testing of power lines, signal lines, and control lines.

   • Multi-path evaluation of antenna ports, cable bundles, and equipment enclosures.

   • Accurate identification of common-mode and differential-mode interference.

3. Extreme Environment Simulation:

   • Key item testing such as CS115, CS116, RS105.

   • Simulation of extreme environments like lightning and Nuclear Electromagnetic Pulse (NEMP).

   • Full item coverage according to military standard severity levels.

4. Zero-Failure Standard:

   • Strict execution of military product performance criteria.

   • Zero tolerance for functional interruptions.

   • Strict limitations on performance degradation.

Conclusion

GJB 151B-2013 is a systematic, platform-based, and extremely stringent electromagnetic compatibility standard. Leveraging our complete "Three Military Certifications" qualifications, over ten years of professional experience, and advanced equipment and software capabilities, we provide customers with a full-process EMC solution from design consultation, prototype development, to final design verification. Our laboratory is not just a platform for standards compliance verification, but also a technical guarantee ensuring the reliable operation of military products in complex electromagnetic environments, providing a solid foundation for generating equipment combat effectiveness.