TPMS Single-Axis LF Antenna Guide
An engineering entry for TPMS LF wake-up / triggering projects to help you decide LF coil and antenna selection directions.
Trigger stability depends on coil axis, placement, metal environment, driver/receiver chain and target distance. Validate with prototypes.
Typical project questions
TPMS projects often fail due to orientation, metal influence and integration constraints rather than a single parameter.
- Unstable sensor wake-up or triggering
- Range / angle sensitivity due to rim metal and mounting position
- Coil axis mismatch with magnetic field direction
- High-temperature, vibration and tight packaging constraints
- Replacement evaluation: size, inductance, Q, impedance and frequency matching
- Prototype works, but mass-production consistency and lead time must be re-validated
Role of LF coils in TPMS
- Single-axis LF coils typically respond to a low-frequency magnetic field from a defined direction.
- Stability depends on coil axis, mounting geometry, metal environment and the driver/receiver chain.
- Prototype tests with actual wheel/rim/valve structure are required.
What to confirm before selection
- Working frequency
- Inductance / Q-factor / DCR
- Coil axis and packaging size
- Mounting position and target distance
- Rim / metal environment
- Temperature / vibration reliability
- Driver or receiver circuit constraints
- Replacement evaluation needs
Recommended directions
For TPMS LF triggering, body-side LF wake-up, and station/fixture triggering when direction is defined and space is constrained.
In some projects, start by evaluating PREMO SDTR1103 single-axis LF coil series, then confirm by size/axis/frequency/L/Q and reliability requirements.
For body-side or fixture-side field generation / wake-up when you need larger coverage or different mounting forms.
For legacy parts, EOL BOMs or when you need to back-calculate candidates from size / inductance / Q / frequency and mounting constraints.
Selection checklist
Confirm these items first to narrow down candidates and speed up sample/replacement evaluation.
- Working frequency
- Inductance
- Q-factor
- DC resistance
- Coil axis
- Package dimensions
- Mounting position
- Target triggering distance
- Rim / metal environment
- Temperature, vibration and reliability requirements
- Driver/receiver circuit conditions
- Sample quantity and volume plan
- Legacy part number if replacement is needed
How Xinri Electronics can help
- Filter PREMO candidates by frequency, size, axis and placement
- Coordinate datasheets, dimensions, parameters and samples
- Provide directions for replacement evaluation of legacy parts
- Align sample / pilot / mass-production path with stock and lead time
Next step
Share your constraints to confirm candidate models, samples, stock status and replacement evaluation approach.