Application scenarios:
When carrying the car key close to the vehicle and pressing the car button or door handle, the car receives a signal to ignite or unlock and sends a signal to the low-frequency antenna.
2. The low-frequency antenna receives a signal and sends a low-frequency trigger signal to the car key.
3. The car key receives a low-frequency trigger signal and emits a high-frequency unlock signal.
4. Upon receiving the unlock signal at high frequency, the entire vehicle completes unlocking or ignition.
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