KGEA-TH - Keyless go emitter antenna winding heat shrink tube (0.108mH-0.500mH)

Freq. (kHz)L (µH)Length (mm)Width (mm)Height (mm)SRF (MHz) MinQ MinCres (nF)
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Keyless go emitter antenna winding heat shrink tube.

This emitter antenna is specifi cally designed for applications in which it is necessary to get a big read range with a minimum size on PCB in low frequency base stations (125 and 134.2 KHz).

It is a perfect solution to be used in vehicles passive entry applications (PE, passive entry) or TPMS (Tyre Pressure Monitoring system), especially when high mechanical stress is involved.

It has 75mm x 15mm x 6.3mm for conventional through-hole assembly. The module
antenna is formed only by ferrite core wound inside of a plastic housing and it fi lled with resin of polyurethane.



  • The antenna can be design with different sizes (small, medium, big), ranges diameter wire (Ø=0.1 to 0,3mm).
  • High reading distance depending of the size ferrite core.
  • Designed for a range of working frequency LF (125 and 134,2kHz).
  • Antenna current. Max. 4 App, Duty 30%
  • High stability in temperature (-40ºC to +125ºC).
  • Good cost/performance ratio


The specification chart is a reference guide for the most common required values at working frequencies of 125 kHz, 20 kHz and 134.2 kHz. Any other inductance value
at LF or tighter tolerances can be provided. Please contact our sales department for any inquiry.

L (mH)Q MinFrequency (kHz)SRF (MHz) MinLength (mm)Width (mm)Height (mm)
KGEA-TH-B-0345J 0.345 125 125 1.5 75 15 6.3
KGEA-TH-B-0500J 0.500 125 125 1.5 75 15 6.3




KGEA-TH nomenclature


H-field measurement LF Antenna KGEA-TH series



Measuring conditions example

  • LF Antenna KGEA‐TH @125 KHz (L=500µH; C=3,3nF). Ferrite Core 68x7x3mm



  • Magnetic field probe measures 1,2,3meters in load Ipp=2App.
  • Receiving the signal from the probe field with the spectrum analyzer.
H‐Field (1m) @ 125KHz (dBuV/m)H‐Field (2m) @ 125KHz (dBuV/m)H‐Field (3m) @ 125KHz (dBuV/m)
Ipp=2App Ipp=2App Ipp=2App
136.2 119.75 109.7