Frequency bands for short range devices

Sending telemetry or telematics over large distances usually requires connecting to existing infrastructure and handing your data to a third party trafficker. Over short distances the best and ofte the only optio is to use one of the licence exempt bands. Almost every country has a set of frequency bands for de-regulated radio equipment, also kno as short range devices or lo po er devices. I these bands operatio is permitted ithout the need for licensing, either by the end user or by a system operator. I recent years there has bee great progress i harmonising frequencies and specifications across Europe, but little move to ards global unification. This presentatio examines the frequency bands available i the UK, Europe and North America and discusses the difficulties and the possibilities of designing multi-country or global systems.