The antennas are 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.

Model	Frequency Range	Power	Connector	Size	Mounting	Standard
HLC 27	26.96 - 27.4 MHz	50 Watts	BNC (f)	80 x 80 x 145 mm	22 mm tube, L = 30 mm & 3/8"	ISO 11452-9
HLC 146	144 - 148 MHz	50 Watts	BNC (f)	80 x 80 x 145 mm	22 mm tube, L = 30 mm & 3/8"	ISO 11452-9
HLC 170	169.8 - 173 MHz	50 Watts	BNC (f)	80 x 80 x 145 mm	22 mm tube, L = 30 mm & 3/8"	ISO 11452-9
FAN 405	380 - 430 MHz	50 Watts	BNC (f)	80 x 80 x 145 mm	22 mm tube, L = 30 mm & 3/8"	ISO 11452-9
FAN 450	430 - 470 MHz	50 Watts	BNC (f)	80 x 80 x 145 mm	22 mm tube, L = 30 mm & 3/8"	ISO 11452-9
EGG 900	890 - 915 MHz	50 Watts	SMA (f)	80 x 80 x 150 mm	22 mm tube, L = 30 mm & 3/8"	ISO 11452-9
EGG 1860	1710 - 2025 MHz	50 Watts	SMA (f)	80 x 80 x 85 mm	22 mm tube, L = 30 mm & 3/8"	ISO 11452-9
PCD 2440	2402 - 2480 MHz	50 Watts	SMA (f)	80 x 80 x 85 mm	22 mm tube, L = 30 mm & 3/8"	ISO 11452-9

Description:

The HLC 27 is a compact dipole antenna for automotive immunity testing, embedded in a plastic housing. The original proposal of ISO 11452-9 had significant drawbacks, which made a practical realisation impossible. Especially the small effective antenna area, high losses and high sheath currents were the main disadvantages of the original design. A shortened dipol with balun, fitting into the original housing was choosen to eliminate the previous mentioned drawbacks. In order to maintain a high degree of symmetry, the coaxial antenna connector leaves the antenna at the center of the rear mounting bolt. This prevents the generation of unwanted sheath currents very effectively. A further reduction of sheath currents can be achieved using the optional coaxial cable loaded with clamp-on ferrites. Am Gehäuse sind zwei Zapfen angebracht. Diese dienen zur Befestigung auf Stativen oder Haltestäben, um die Antenne entweder in horizontaler oder vertikaler Lage ausrichten zu können. The antenna housing comes with two fixture bolts, which can be used to mount the antenna either in vertical or horizontal orientation

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.

The HLC 27 is part of a series of antennas described in ISO 11452-9.

Standing Wave Ratio