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Radio Frequency IO

A simple RF Transmitter for digital data

From David Huisman

Loop dimensions given are for 303.8 Mhz. The antenna is a printed track that is 3mm wide and occupies a square with side lengths of 25mm. Keep the component lead lengths as short as possible.  Single sided PCB works fine (there must be no earth plane under the loop antenna). The resonators can be obtained from RFM (www.rfm.com) and are available in surface mount or conventional packaging.

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