As society grows, parents become more concerned for the security of their children. The "Electronic Tether" assists parents in keeping track of where their children are located. This is a joint project broken into three subsystems: RF (radio frequency), Digital Systems, and Power. Communication was accomplished between the child's unit and the parent's unit by an RF link at 2.4 GHz. Through the use of microstrip and microstrip surface mount components a PRN code was modulated onto a 2.4 GHz signal and transmitted. At the receiver correlation data and distance information was determined by the use of a system constructed from surface mount mixers, SAW filters, and VCO's.
 

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