Schwarzbeck HLC 146 Monopole Antenna

The Antenna HLC 146 is a monopole antenna located in a PVC-housing for automotive immunity testing on component level. This antenna type is proposed in the standard ISO 11452-9. The antenna construction has its origin from IETR Institute d'Electronique et de Telecommunications de Rennes. For ISO 11452- 9 it was modified. The antenna housing comes with two fixture bolts, which can be used to mount the antenna either in vertical or horizontal orientation. We strongly recommend to use the optionally available coaxial cable equipped with snapon-ferrites to suppress unwanted sheath currents, since the antenna itself does not provide any common mode rejection according to its monopole-nature. 

CAUTION

The BNC antenna connector must not be touched during TX-operation due to hazardous voltages and fieldstrength! The relevant safety standards for exposition to electromagnetic fields must be considered. Immunity tests shall only be made by skilled personnel, being familiar with possible hazards. Testing must take place in appropriate environments (anechoic chamber or shielded room).

Due to its construction the antenna can be de-tuned when approaching too close to other devices. This may degrade the impedance matching and generate unwanted sheath currents, which can lead to high temperatures of the snap-on-ferrites of the coaxial cable. In such cases the transmit power should be switched off until the ferrites have cooled down.

Additionally further antennas of as described in ISO 11452-9 are available.

Standing Wave Ratio