ARLA/CLUSTER: Engenheiros chineses desenvolvem antena em plastico e agua salgada.

[João Costa > CT1FBF]

Saltwater and Plastic Antenna

A new antenna that uses saltwater and plastic has been developed by *Lei
Xing* and her colleagues at the College of Electronic and Information
Engineering at Nanjing University of Aeronautics and Astronautics in China

IEEE Spectrum reports researchers have developed an advanced liquid-based
antenna system that relies on a readily available ingredient: saltwater.

The saltwater-based antenna that achieves 12 directional beam-steering
states and one omnidirectional state. Its circular configuration allows for
complete 360-degree beam-steering and works for frequencies between 334 to
488 MHz.

The proposed design consists of a circular ground plane, with 13
transparent acrylic tubes that can be filled with (or emptied of) salt
water on demand. One tube is located in the center to act as a driven
monopole (the radio signal is fed in via a copper disk at the base of the
tube). Surrounding it are 12 so-called parasitic monopoles. When only the
driven monopole is excited, this creates an omnidirectional signal. But the
12 remaining monopoles, when filled with water, work together to act as
reflectors and give the broadcasted signal direction.

Read the IEEE article at
https://spectrum.ieee.org/tech-talk/telecom/wireless/new-antenna-uses-saltwater-to-achieve-multiple-beamsteering-states
-------------- próxima parte ----------
Um anexo em HTML foi limpo...
URL: http://radio-amador.net/pipermail/cluster/attachments/20190922/3d48d67e/attachment.htm