Hmmmm.
Me, I read far enough to see that the paper wasn't published on April 1. Since
it wasn't, I went back to watching Sponge Bob Square Pants.
;^)
Al
AB2ZY
-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf Of Erich
Sent: Friday, April 10, 2015 10:36 PM
To: towertalk@contesting.com
Subject: Re: [TowerTalk] Much Smaller Antennas Possible?
My first thought on this is "there is no free lunch". I have not yet read the
paper, and do not understand what they call "symmetry breaking". However,
there are two things that limit the performance of physically small antennas.
First, power density is defined as power per unit area. This means a small
capture area will capture a small amount of power. Second, physically small
antennas usually mean small impedances. That means high currents and high
I^2*R losses.
Superconducting antennas can get around some of these losses at the cost of
high complexity.
The basic concept of an antenna is matching an electrical circuit to free space
impedance. Dielectric antennas are well known and often used in UHF and above
antennas. The purpose of the dielectric is to make the wavelength physically
smaller for a given frequency by a proportionality constant known as the
dielectric constant. This tends to concentrate the field in the dielectric,
making the loss tangent of the material important.
Since the time of Newton, we have known that differing dielectric constants
bend photons at interfaces between different dielectric constants. (Radio is
just long wavelength photons.) So changes in dielectric constant tend to
reflect and refract the waves unless carefully engineered to pass them
efficiently.
This concept appears to be trying to apply some quantum effects to radio
wavelengths. We already do this with lasers. Light is emitted at a specific
wavelength when an electron transitions from one energy level to another. This
appears to be a mechanical analog of this process.
This would allow a physically small device to emit coherent energy.
I will follow up after I have read the paper to see if there is anything useful
here.
73, Erich
N6FD, DM15dp
On 4/10/2015 9:07 AM, Mickey Baker wrote:
> An interesting phenomenon called "symmetry breaking" unlocks the
> possibility of gain antennas much smaller than traditionally thought
> and seems to explain some of the quantum v. particle theory inconsistencies.
>
> Thoughts on this article?
>
> http://eandt.theiet.org/news/2015/apr/antenna-chip.cfm
>
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