Highest attainable frequencies by a transmitter

[chromosome24]

what is the highest attainable frequencie by an oscillator circuit?

 

[waht]

Depends on what technology is used. If you are talking about an oscillator built from a semiconductor devices then the frequency of a free running oscillator might be like 200 GHz without any frequency multipliers. With multipliers you can boost the frequency to a few Terahertz.

Then there is what's called a photomixing, where they use a special mixer to mix 2 lasers to produce IF in the Terehertz range.

 

[chromosome24]

is it possible to have an oscillator that produces frequencies in the visible spectrum or higher? if not why?

 

[berkeman]

A gas laser is an example of a visible wavelength oscillator.

 

[chromosome24]

yes, but what I am trying to say is that is it possible to emmite visible light out of an antenna.

 

[waht]

Your eyes have antennas or cones that are of a specific lengths that resonate at red, green and blue frequencies. The wavelength is the size of the cell basically.

You are asking what is the highest attainable frequency by an oscillator? Well, an electromagnetic wave at any frequency can be achieved by different methods.

Gamma rays at the end of the electormagnetic spectrum are generated by a radioactive decay.

The highest ever frequency detected eminated from cosmic rays which was a single proton carrying energy of 50 Joules.

 

[chromosome24]

so theoreticaly i could build a something like a radio transmitter except have it transmit cosmic waves?

 

[chroot]

It's true, in general, that waves of any frequency can be manufactured with methods that vary from simple RF electronics up to particle accelerators. It is not true, however, that you can use something like a simple dipole antenna to produce gamma rays.

- Warren

 

[chromosome24]

why is that?

 

[NoTime]

why is that?

Size for one thing.
The smallest conceivable dipole is probably 2 atoms.
Gamma is quite a bit shorter than the diameter of a single atom.

 

[chromosome24]

aaaaaahhhhhhhhhhh. i see. thanks for the info fellas and/or ladies.