>From the article:
Their ME antennas are fabricated as suspended ferromagnetic-piezoelectric
thin-film heterostructures that transmit and receive radio waves through the ME
effect at their acoustic resonance frequencies.[2] In transmission, the bulk
acoustic waves in the ME antennas stimulate magnetic oscillations in the
magnetic thin film, and these oscillations produce electromagnetic radiation.
Conversely, in radio reception, the ME antennas convert the magnetic fields of
electromagnetic waves to acoustic waves using the piezoelectric effect.[2]
The concept for this type of antenna was theoretically proposed in 2015.[5]
When the excitation was via surface acoustic waves, such devices only worked at
a few kilohertz. The antennas of the present study are based on bulk acoustic
waves, and they perform as well as conventional antennas, but at a hundred
times smaller size.[2] The concept was demonstrated at at VHF and UHF
frequencies.[2]
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On Tue, 5/22/18, Wolfgang Büscher <[email protected]> wrote:
Subject: Re: VLF: Effective Antennas 1/1000th of a Wavelength
To: [email protected]
Received: Tuesday, May 22, 2018, 12:06 PM
Now all we need it the TX-capable
counterpart.
Because the ultra-narrow-band
thing described in the article is
receive-only.
On
22.05.2018 00:42, John Fisher wrote:
>
Exciting new developments in radio recently...New methods
and materials enable effective antennas as short as 1/1000th
of a wavelength...That's like a 3 inch antenna at 80m
working like a full sized dipole...
>
> http://tikalon.com/blog/blog.php?article=2017/mini_antenna
>
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