LF magnetic field antennas target keyless entry applications

December 02, 2019 //By Christoph Hammerschmidt
LF magnetic field antennas target keyless entry applications
Improvements in mechanical and electrical performance as well as optimized size is what manufacturer Premo is promising for users of its new KGEA-MRHPM series of LF emitter antennas for automotive RFID environments. The antennas are designed for PKE (Passive Keyless Entry)/ PEPS (Passive Entry/Passive Start) applications.

Most of the vehicles currently manufactured with a KES (Keyless Entry System) use several short antennas. Depending on the quality of the vehicle and the system, three to six antennas are used – for example, in the door handles, interior, trunk and/or bumper locations, depending on car size.

Current technology trends push the car side to reduce number of the antennas, to improve electrical and mechanical performance. This requires from manufacturers to transition from 4-6 short range antennas to 3 Middle-range antennae, and ultimately to 2-1 Long range antennae.

Premo’s KGEA-MRHPM Series (mid-range antennae) have been designed to reduce the number of antennas compared to the total number short antennas with equal or better performance reading distance and H-field around the whole vehicle, and with the best guarantees of robustness: both mechanical and IP69K or better waterproof grade of the automotive market.

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