For example, 3G cell phones require multiple power amps (compared to one in each 2G phone) to support 2G and 3G air interface standards across multiple frequency bands.

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Simply stated, single-frequency networks are when a broadcaster uses multiple transmitters to send the same signal over the same frequency.

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It also makes threats to go bankrupt even more ridiculous when there are multiple viable options for a home for that frequency.

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Patwari plans more research on whether different or multiple radio frequencies might detect breathing better than the one 2.4 gigahertz frequency used in the study.

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