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Tag Archives: antenna

Help with this DAB antenna puzzle

DAB-aerial

Aldi is stocking an own-brand (‘Bauhn’) DAB converter for cars that connects to a conventional car radio via an aux input or via an FM transmitter. And it works very well, I have found – clear-sounding and only occasionally loosing the DAB signal – heavy tree cover seems a challenge to it. The antenna is a stick-on thing that goes ...

THz solar antennas instead of solar cells

GaTech-optical-rectenna

Rather than splitting an exiton across a p-n junction, why not receive light like radio waves, with an antenna and a diode? That is the thinking behind a project at Georgia Tech, which has produced a class of devices called rectennas. The first optical rectenna was produced in 2015, now the Tech is reporting a doubling of efficiency and a ...

Peregrine Semiconductor celebrates 30th anniversary with name change

Peregrine Semiconductor now pSemi

  On the occasion of its 30th anniversary and the shipment of its four billionth chip, Peregrine Semiconductor has changed its name to pSemi. The Murata company has announced that it will broaden its scope and portfolio to include power management, connected sensors, optical transceivers, antenna tuning and RF front end products. “We’ve challenged the pSemi team to broaden their ...

Optical antenna makes fibres sense X-rays

xray sensor Miguel Angel Suarez FEMTO-ST Institute

X-rays have been sensed with high resolution using an optical antenna on the end of an optical fibre – which could offer another route to precision medical imaging. “We want to develop this technology so that it could be used in radiotherapy, for example,” said Thierry Grosjean of the FEMTO-ST Institute at France’s National Centre for Scientific Research. “Specifically, the ...

Embroidery makes wearable antennas

Ohio embroidered antenna

Embroidery with 100μm precision could create brain implants, or integrate electronics into wearable items, claims a team from Ohio State University. “A revolution is happening in the textile industry,” said engineer Professor John Volakis. “We believe that functional textiles are an enabling technology for communications and sensing, and even medical applications like imaging and health monitoring.” While looking into using ...

Sea water fountain is RF antenna

Mitsubishi SeaAerial

Mitsubishi has invented an antenna made from sea water. Branded SeaAerial, it shoots a column of water into the air to create a conductive plume for transmission and reception. “A plume of seawater can be used as an antenna if it is insulated, so Mitsubishi Electric developed an insulated nozzle that transmits radio waves to the antenna even when the ...

How does a planar inverted F antenna work?

Planar inverted F antennas get used a lot in phones, and there is a most excellent introduction to PIFAs at antenna-theory.com. At least I hope it is, because it is very easy to pull the wool over my eyes when it comes to radiating power so I have no real way of judging. Not only is the explanation clear, but ...

In depth: NASA’s passive Wi-Fi saves 80% power

NASA has revealed a technique which dramatically cuts the power consumption of Wi-Fi comms, at least at the remote terminal. Key is modifying the Wi-Fi base station to allow the transmitter of the remote terminal to be replaced by a modulated passive reflector. “In a Wi-Fi radio, 70-80% of power is consumed generating Wi-Fi signal. If you only reflect, you ...