GTEM Cell Chamber RF Electromagnetic Field Radiation Immunity (EMS) and Emission Limit (EMI) Test

GTEM (Gigaherz Tanseverse Electromagnetic) Cell Test Chamber is a new type of electromagnetic compatibility test equipment developed based on the TEM Cell Chamber (it applies asymmetric rectangular structure to simulate free space to generate TEM electromagnetic waves inside the small chamber). Using GTEM transverse electromagnetic wave transmission chamber to perform EMC performance testing is a new measurement technology developed in the EMC field in recent years.

Due to the high broadband performance of GTEM (from DC to microwave), it can be used for RF Electromagnetic Field Radiation Immunity (EMS) testing and RF Electromagnetic Field Radiation Emission Limit (EMI) testing. Compared with various test chambers, shielded rooms, anechoic chambers and open-air test fields, GTEM Test Chamber haS simple structures, low costs, easy and fast, and automatic control tests, and have been highly praised and recognized by many famous third laboratories.

Specification:

GTEM Cell Test Chamber Structure Diagram

The electric field intensity at the center of the gigahertz transverse electromagnetic is:
E: Vertical component of electromagnetic field strength
Po: RF power fed to the Hertz Transverse Electromagnetic Chamber
Rc: Impedance characteristic of gigahertz transverse electromagnetic chamber
d: The vertical distance between the core board and the upper / lower boards
It can be calculate larger field strength value according to the size between the core plate and the upper / lower bottom plates of the Hertz transverse electromagnetic wave chamber in the formula.

P.S. Due to the size limitation of container, GTEM-2 and GTEM-4 can be transported as assembled units in 40HQ container, but GTEM-6 and GTEM-8 need to be assembled on site.

Application:
1. GTEM used for RF Electromagnetic Field Radiation Immunity (EMS) Full-Compliance Test (LISUN Model: GTEM-EMS):
GTEM chamber with Signal Generator, Power Meter, Field Strength Probe / Monitor and Power Amplifier can fully meet IEC 61000-4-3, IEC 61000-4-20, GB/T 17626.3 and GB/T 17215 standards for RF Electromagnetic Field Radiation Immunity (EMS) Full-Compliance Test. This test system has been widely used in electric power, communication, military industry, quality inspection and other fields, and has established a strong test foundation for evaluating the sensitivity of small electronic equipment to radiated electromagnetic field interference. 

P.S. The above Power Amplifiers can test based on IEC 61000-4-3 Table 1 Level 1 (1 V/m) to Level 4 (30 V/m). Other power/frequency Power Amplifier can be designed according to customers’ requirements. 

GTEM Chamber RF Electromagnetic Field Radiation Immunity (EMS) Full-Compliance Test System Configuration

2. GTEM used for RF Electromagnetic Field Radiation Emission Limit (EMI) Pre-Compliance Test (LISUN Model: GTEM-EMI):
GTEM chamber with LISUN EMI-9KC EMI Receiver System (R&S or PMM receiver system is also optional) to perform RF Electromagnetic Field Radiation Emission Limit (EMI) Pre-Compliance Test according to IEC 61000-4-20, CISPR 11, CISPR 14, CISPR 20, CISPR 22, CISPR 25 and CISPR 32. By simulating free space and open field test conditions, using mathematical modeling and three-dimensional data acquisition and calculation methods, it provides economical, convenient and feasible solutions for the electromagnetic compatibility EMI testing of small-sized electronic and electrical products for the majority of corporate users. The Pre-Compliance Test approach can effectively evaluate the impact of electronic equipment on the electromagnetic environment.

GTEM Chamber RF Electromagnetic Field Radiation Emission Limit (EMI) Test