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Re: [TowerTalk] Much Smaller Antennas Possible?

To: "towertalk@contesting.com" <towertalk@contesting.com>
Subject: Re: [TowerTalk] Much Smaller Antennas Possible?
From: Al Kozakiewicz <akozak@hourglass.com>
Date: Sat, 11 Apr 2015 13:14:49 +0000
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
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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