Remote Keyless Entry Repeater

Modern automobiles frequently come equipped with Remote Keyless Entry (RKE) systems. Stock RKE systems are frequently subject to severe range limitations. This project presents a design for a device which extends the range of existing RKE systems without requiring modification to the automobile. The device functions as a single frequency “Parrot” repeater. The repeater receives and decodes the signal from the user’s key chain transmitter, then verifies the code and transmits it to the automobile. The final design is a low cost, low power, battery operated device suitable for placement in an automobile. A USB interface allows decoding routines for specific automobiles to be loaded on the repeater ensuring the device can function for a wide range of manufacturers systems. Index Terms Repeater, Remote Keyless Entry (RKE), Radio Frequency (RF)