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Tag: antenna

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Liquid Metal Antenna Tuning

Antennas resonate harmonically with radio waves according to how the length of the antenna matches the wavelength. Antennas can be tuned to a specific wavelength by changing their length. Using an applied voltage to change the length of some liquid metal, creates an antenna that can be tuned electronically. An antenna capable of tuning by […]

Galactic Communications Using a Gravitational Lens

Gravitational lensing is the process of a large mass bending light from a distant source. Einstein predicted this and astronomers can now detect it. By placing an optical collector or a radio antenna at a distance of 550 AUs or greater from our Sun, it can be used as a lens to focus detail from […]

Origami Folding Fractal Antennas

Origami is the Japanese art of folding paper into sculpture-like shapes of art. Any flat material can be used in this manner. Fractal patterns have become useful in antenna design by reducing size and also allowing a wider performance range. Applying origami folding techniques to flexible electronics promises to develop even smaller, more efficient and […]

WiFi on a Chip

Old fashioned “wireless” radios were entirely analog, before the age of digital electronics began. The form of wireless communication we know as “WiFi” depends upon many digital circuits but also still has some analog components. Intel is working on a WiFi circuit that is mostly digital. And a Singapore based research group is developing a […]

Flexible Metamaterials

“Invisibility” cloaking devices already exist in the lab, but only with such restrictive conditions that they are not very useful. Restrictions in the range of effective optical frequencies and the size and structure of the cloaking materials leave a large gap between laboratory performance and a functional cloaking device. A new flexible form of metamaterial […]

Fractal Antenna

Conventional antennas were typically based on some fraction of the wavelength that they were designed to receive. This meant the size of the antenna often varied with the frequency range they used. Fractal antennas reduce the overall size of the antenna because the length of the receiving contact is distributed over a fractal pattern that […]