Home page

Immunity test to narrowband radiated electromagnetic energy-Transverse wave (TEM) cell method

1. Introduction to the test

　　In the circuit design of automobiles/construction machinery, all circuits are powered by batteries and connected in parallel. The electronic control part mainly includes the controller PLC, switching power supply, relay group, sensors from the mechanical engineering part, the display on the console, the GPS in the cab, etc. These devices will inevitably generate electromagnetic disturbances when they are working. Disturbances may be propagated through conduction or radiation. While considering how to suppress these disturbances, these modules also need to consider whether they can withstand interference from other devices/modules and the environment , such as radio frequency radiation, to ensure that it can work normally.

　　For radio frequency continuous wave immunity, considering that low frequency has higher requirements on power amplifiers, and considering comprehensive factors such as cost and result consistency, the usual test frequency bands and experimental methods are as follows:

　　ISO 11452-2, ALSE free field method, 80MHz~18GHz;

　　ISO 11452-3, TEM chamber method, 10KHz~200MHz;

　　ISO 11452-4, BCI method, 1MHz~400MHz;

　　ISO 11452-5, Stripline method, 10KHz~400MHz;

　　ISO 11452-7, BAN direct injection, 250kHz~500MHz;

　　ISO 11452-8, low frequency magnetic field immunity, 15Hz~150KHz;

　　ISO 11452-9, portable transmitter, 26MHz~5.85GHz;

　　ISO 11452-10 audio extension, 15Hz~250KHz;

　　The advantage of the TEM chamber method is that it generates high field strength in the low frequency band and requires a smaller power amplifier. However, based on the characteristics of its own products, there are limitations to the larger EUT, and the consistency of its test results is also lacking.

2. System connection diagram

3. Typical configuration

Radio frequency immunity - TEM cell method [according to GBT 33014.3/ISO 11452-3]
serial number	product	illustrate	brand
1	SMC100A	Signal source, 9KHz~1.1GHz	Rohde&Schwarz/Germany
2	BBA150-A125	Single Band Power Amplifier, 9 KHz~250 MHz, 125 W, Air Cooled	Rohde&Schwarz/Germany
3	NRP6AN	Average Power Sensor, 8kHz~6GHz, 100pw~200mW, N(m)	Rohde&Schwarz/Germany
4	GTEM 1000	GTEM cell, frequency range: DC - 1GHz; core plate height: 74mm; maximum field strength: 2600V/m; maximum input power: 1kW; size: 540mm x 450mm x 168mm	TESEQ/ Germany
5	EFS-10	Field strength probe set, 10kHz~9.25GHz, 0.5~500V/m	Frankonia/Germany
6	EMC32-S	EMS test software, including license	Rohde&Schwarz/Germany

Century Wisdom (Suzhou) Testing Technology Co., Ltd

www.300.cn nanjing SEO

Business License

全部

全部
产品管理
新闻资讯
介绍内容
企业网点
常见问题
企业视频
企业图册