LF magnetic field antennas target keyless entry 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.
The KGEA-MRHPM series solves the technical challenges, preserving all the advantages of Mid-Range antennas while keeping all the favorable features of the short-range antennas: cost effective, mechanically robust and thermally stable.
The product offers waterproof protection IP (IP69K) and is capable to bear high mechanical loads through inflection, torsion and drop. The part is fully covered with thermoplastic HPM technology, using a patented technique where there is no point of union between different plastics, allowing a complete water-proof antenna.
Another benefit of this antenna is its built-in connector to avoid ASSY Cables + external connector, reducing BOM, cost and easing assembly.
Larger antennae need long magnetic cores (very brittle) and are less stable in the standard range of operation temperatures. The manufacturer solved the issue of using high temperature stability cores and protecting the core against magnetostriction using low CTE (coefficient thermal expansion) materials and proper L/D relationship of the magnetic core.
The antenna meets the AEC-Q200 automotive quality standard. among others more restrictive tests specified by automotive OEMs.
The KGEA-MRHPM series antenna can be considered as Universal Mid-Range antenna suitable to fit in any car location (interior, exterior, dry and/or wet zone) using always the same fixing method and same connector. This is particularly important to facilitate PKE/PEPS harness and architecture design in the car side.
More information: https://www.grupopremo.com/712-kgea-mrhpm-integrated-corrector-middle-range-antenna-lf-for-smart-entry-system
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