Innovative New Wireless Antenna is Dramatically Smaller
Researchers at Northeastern University have demonstrated a new type of radio antenna that operates in the frequencies used for some cellular networks and Wi-Fi, but is up to 100 times smaller than current antenna designs. The new antenna can be manufactured on a single chip approximately 1mm across. It receives radio signals by first converting radio waves to acoustic waves, then to electrical signals, and the same in reverse for transmitting. The existing method of converting directly between radio and electrical signals requires an antenna with a physical length 1/10 the radio wavelength. The new technique uses the properties of acoustic waves to permit an antenna made of a piezomagnetic membrane that's just 1/1000 the physical length of the radio wavelength. The piezomagnetic material is joined with a piezoelectric material to create the necessary electrical link. The technology could shrink the size of phones and wearables. It may also open up lower frequencies — which today require antennas too large to carry around — to mobile devices.
Sep 26, 2019
Anker today introduced a new range of Spirit and Liberty Bluetooth earbuds. The new buds are much-improved over the original Spirit and Liberty series, but also much more expensive.
Aug 13, 2019
Apple has updated Apple Wallet to support additional vendors of systems that power contactless student ID cards, enabling a number of new colleges and universities to roll out support for storing a student ID card in Apple Wallet. The feature lets students use their iPhone or Apple Watch to access campus facilities and pay for meals, laundry, and other purchases where a student ID is accepted as payment.
Sep 12, 2018
Apple today announced the fourth-generation of Apple Watches. For the first time since the original Watch, Apple is changing the dimensions of its smart wearable.
Apr 1, 2020
T-Mobile has officially completed its merger with Sprint. For the moment, the merger has little effect on customers, but "Sprint" lives only as a brand of T-Mobile, not a separate company.
Jan 14, 2019
A new design for Bluetooth LE tags removes the need for a battery and fits into a cheap, thin, stamp-size sticker, or can be embedded directly in consumer product packaging. A tiny ARM processor transmits an ecrypted ID code like other Bluetooth tracking tags, but is powered by a new antenna design that harvests power from ambient radio waves.