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Energy harvesting has given rise to low-power wireless sensors

New Applications for Energy Harvesting Blame it on the cell phone. As mobile phones morphed from wireless analogy telephones to handheld computers, users kept demanding more and more energy-consuming features,­­ such as web browsing, videos, gaming, and email, while still requiring extended battery life. Since battery makers were not much help, semiconductor manufacturers devised numerous

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The threat from LTE (4G) to 868MHz alarm systems

With a conservative figure of 33 million 868MHz receivers in situ, there’s a growing concern over the impact of 4G (LTE) and “Out Of Band” (OOB) interference. Ofcom (UK) issued a consultation document [i.55] on the technical parameters for alarms.  http://stakeholders.ofcom.org.uk/consultations/technical-licence-conditions/   In this they acknowledge the threat to alarms, but propose to do nothing

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