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Immunity test to narrowband radiated electromagnetic energy-Portable transmitter simulation method

1. Introduction to the test

　　With the development of science and technology, mobile communication has become the trend of the future, and the same vehicle-mounted mobile communication devices (such as mobile phones/Bluetooth devices, etc.) These devices can generate field strengths as high as 100 V/m or more. If the existing radiation immunity test method is used, the test distance is 1 meter or 3 meters, the power of the power amplifier is relatively large, and the cost is too high. In order to study the impact of these devices on other electronic devices (such as vehicle-mounted equipment and medical equipment), it is necessary to introduce a more effective radiation immunity test method. Using a 10-20W power amplifier can generate very high field strength.

　　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;

2. System connection diagram

3. Typical configuration

Radio Frequency Immunity - Portable Transmitters [according to ISO 11452-9]
serial number	product	illustrate	brand
1	SMB100B	Signal source, 9KHz~6GHz	Rohde&Schwarz/Germany
2	OSP220	Automatic RF switch control unit, with 3 control card slots on the back of the basic version and 2 upgradeable card slots	Rohde&Schwarz/Germany
3	BBA150-BC500	Single Band Power Amplifier, 80 MHz~1 GHz, 500 W, Air Cooled	Rohde&Schwarz/Germany
4	BBA150-D110	Single Band Power Amplifier, 0,69 GHz~3,2 GHz, 110 W, Air Cooled	Rohde&Schwarz/Germany
5	NRP6AN	Average Power Sensor, 8kHz~6GHz, 100pw ~200mW, N(m)	Rohde&Schwarz/Germany
6	SBA 9113	Small biconical microwave antenna, frequency range 0.5~3GHz, 20W, used for CIS/A/648/CDV CISPR 16-1-4 site VSWR measurement (above 1GHz)	Schwarzbeck/Germany
7	420 NJ	Antenna Element for Handheld Transmitter Radiated Immunity Tests for Ford Standard RI115, Requires SBA 9113 or SBA 9113 mini	Schwarzbeck/Germany
8	Opt. Spacer 50	Polystyrene spacer to maintain 420 NJ test distance of 50mm	Schwarzbeck/Germany
9	EFS-10	Field strength probe set, 10kHz~9.25GHz, 0.5~500V/m	Frankonia/Germany
10	EMC32-S	EMS test software, including license	Rohde&Schwarz/Germany

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