Investigation To Determine Optimisation Routes For New Choke Tunnel Design For 900MHz ISM Machines

Executive Summary

In the UK, industrial microwave ovens are allocated an ISM frequency that allows them to transmit at high levels in the same band as GSM mobile phones. Consequently, when mobile phone base stations are located in the vicinity of an industrial microwave oven their coverage over the ISM band is severely disrupted. No special ISM industrial microwave oven provision exists in the rest of Europe, therefore the European emission limit is much lower than in the UK.

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