Electronic Projects, forums and more.

Go Back   Electronic Circuits Projects Diagrams Free > Electronics Forums > General Electronics Chat


General Electronics Chat This forum is for general chat about electronics, eg: Dont know what a part does? Dont know how to read a circuit? Want to get an opinion?

Reply
 
Tools
Old 30th June 2009, 07:52 PM   #16
Default

Not so big. I was editing while you posted.
__________________
Please post questions to the forums. PM's are for personal communication.

BCHS/3v0's Tutorials
Junebug USB PIC programmer kit., USB Bit Whacker,
The 15 Minute Printed Circuit Board! (+drill time)
3v0 is online now  
Old 1st July 2009, 11:16 PM   #17
Default

what this "E" emits? E-waves? i find weird all these antenna shapes out there... sometimes i'm wondering if they are really operational or just decoration_al
whiz115 is offline  
Old 2nd July 2009, 12:53 AM   #18
Default

Quote:
Originally Posted by whiz115 View Post
what this "E" emits? E-waves? i find weird all these antenna shapes out there... sometimes i'm wondering if they are really operational or just decoration_al
Designing antennas is a very creative process. There are some antennas that are designed using what is called a Genetic process (the antennas may be called Evolved or Evolutionary antennas) and the appearance of these antennas is often very sculptural and mysterious. This process uses a computer simulator. In the process, you start with some structure, simulate its performance, then allow one part of it to grow or shrink in a random direction. Then you check its performance again. If it got better than before, you keep that change, if it did not, you back up and try another change. This is a pretty dumb way to design an antenna, but with a computer doing all the dumb guesses and calculations it is fairly easy to do. It is really just automated trial and error (of course I am oversimplifying the details). It is surprising how interesting the results can be sometimes.

Evolved antenna - Wikipedia, the free encyclopedia
__________________
RadioRon

Last edited by RadioRon; 2nd July 2009 at 12:54 AM.
RadioRon is offline  
Old 2nd July 2009, 01:21 AM   #19
Default

Wow the NASA antenna looks like a bent paperclip amazing
__________________
Bill
Smart Kits build Smart People

http://www.blueroomelectronics.com/
blueroomelectronics is offline  
Old 2nd July 2009, 01:30 AM   #20
Default

Quote:
Originally Posted by RadioRon View Post
Designing antennas is a very creative process. There are some antennas that are designed using what is called a Genetic process (the antennas may be called Evolved or Evolutionary antennas) and the appearance of these antennas is often very sculptural and mysterious. This process uses a computer simulator. In the process, you start with some structure, simulate its performance, then allow one part of it to grow or shrink in a random direction. Then you check its performance again. If it got better than before, you keep that change, if it did not, you back up and try another change. This is a pretty dumb way to design an antenna, but with a computer doing all the dumb guesses and calculations it is fairly easy to do. It is really just automated trial and error (of course I am oversimplifying the details). It is surprising how interesting the results can be sometimes.

Evolved antenna - Wikipedia, the free encyclopedia

wow... i knew about fractal antennas because i like to play with Wifi's and i thought it was over engineered toy...
whiz115 is offline  
Reply

Tags
antenna, make, pcb

Thread Tools
Display Modes


Similar
Title Starter Forum Replies Latest
looking for a uhf antenna for pc cryptone General Electronics Chat 1 22nd April 2009 07:41 PM
Duck antenna or chip antenna? bananasiong General Electronics Chat 1 13th January 2009 07:06 PM
PCB Antenna Badar General Electronics Chat 1 18th February 2007 08:47 PM
Antenna Q n A zachtheterrible General Electronics Chat 4 12th July 2004 04:17 PM
antenna tdag Electronic Projects Design/Ideas/Reviews 5 9th April 2003 03:32 PM



All times are GMT. The time now is 01:25 PM.


Electronic Circuits  |  Learning Electronics
eXTReMe Tracker