Its happened to all of us. Youre on your cell phone, your boss is saying something important, and then th.. con...ction star..s to drp out. Now a team of physicists in Denmark, led byand , has demonstrated a new kind of radio tuner that is far more sensitive to faint signals. The technique could eventually mean fewer dropped calls, better GPS coverage, faster Wifi, and much more detailed images from MRI scanners. The tuner includes a novel component: a tiny reflective membrane just half a millimeter on a side and only a hundred nanometers thick. It functions in the circuit as a capacitor, and when radio waves pass through the antenna, the minuscule voltage shifts make the membrane bounce like a trampoline. Laser light, reflecting off the membrane and then interfering with itself, turns those nanometer-high wiggles into a strong, clear signal. The report is published on the site . [Tolga Bagci et al., ] The scientists are excited about how the technology might sharpen the pictures produced by radio telescopes. But wouldnt it also be nice to actually get decent phone reception inside a parking garage? Wayt Gibbs [The above text is a transcript of this podcast.] Followon Twitterand . Visitfor the latest in science, health and technology news. 2013 . All rights reserved.
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