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Wednesday, July 28, 2021

Cell Phone Radios Could Take Another Giant Leap Towards Miniaturization

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Modern cell phones are packed with radios to send and receive phone calls, text messages and high-speed data. In turn, each relies on a mix of technologies—for instance, the filters used to extract the desired signal from the welter of radio waves hitting the antenna are typically so-called acoustic devices based on piezoelectric crystals, whereas the amplifiers and mixers are semiconductor electronics, and circulators and isolators are often gyromagnetic components.

Now, an acoustic type of amplifier has been developed that is more than 10 times smaller than comparable electronic versions, potentially suggesting a novel strategy to miniaturize wireless technology, according to a new study.

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