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Design Reflector - RF Cafe Forums

Because of the high maintenance needed to monitor and filter spammers from the RF Cafe Forums, I decided that it would be best to just archive the pages to make all the good information posted in the past available for review. It is unfortunate that the scumbags of the world ruin an otherwise useful venue for people wanting to exchanged useful ideas and views. It seems that the more formal social media like Facebook pretty much dominate this kind of venue anymore anyway, so if you would like to post something on RF Cafe's Facebook page, please do.

Below are all of the forum threads, including all the responses to the original posts.


 Post subject: Design Reflector
Posted: Thu Apr 06, 2006 9:13 am 
 
Lieutenant

Joined: Thu Apr 06, 2006 9:09 am
Posts: 1
wilcome for all

i need help for Design Reflector Antenna

where i can fond some program to design

thank u


 
   
 
 Post subject: Design Reflector
Posted: Thu Apr 13, 2006 7:24 am 
 
General
User avatar

Joined: Fri Feb 17, 2006 12:07 pm
Posts: 218
Location: London UK
What exactly are you trying to design?
At a top level, the design of a parabolic reflector is very straight forward and can be done yourself on Excel. The profile is just the formula for a parabolic curve. The ratio of focal length to diameter should be around 0.6 for optimum efficiency.

Any text book will give you the gain for a given wavelength but is approximately
Gain = 17.5+20*LOG(F*D) dBi
where F is in GHz and D is in meters.

One of the basic books is S.Silver
Samuel Silver. Microwave Antenna Theory and Design, volume 12 of MIT Radiation Laboratory Series. McGraw-Hill, New York, 1949

I can give you more help directly by email

If you are doing a detailed analysis to consider phase errors for example and their effect on sidelobes you something like Jassik or Skolnik.

The software suites used are based on Geometric Theory of Optics (GTO) but I do not know of a commercial package. A Google with those key words might give success




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