Design Pyramidal horn antenna Using HFSS

[rafa040]

Specs:
freq= 2.8Ghz
wave guide dimension
a=86mm
b=43mm
power = 15 dbm
plz help me design it plzz thanks..

 

[jeeudr]

I believe that you are referring to the WR-340 waveguide ?

Find attached a .hfss file which should be useful.

 

[rafa040]

Thanks You Sir,
Sir , can i have the calculations . or can you tell me how you hav calculated all the other parameters?
Thanks agai for your time and help..

 

[jeeudr]

Thanks You Sir,
Sir , can i have the calculations . or can you tell me how you hav calculated all the other parameters?
Thanks agai for your time and help..

For the waveguide, I just looked up the dimensions in a table. For the rest, I have sent you a private message with the details. Check your inbox for more information. Post back here if you have any issues.

 

[Michael J]

Hi Sir,
I got the similar problem with this guy. Could you tell me how to draw the pyramidal horn? I just use the 'line' to draw the shape of the horn's wall, but inside the wall, it is empty, which means the wall actually has no thickness. Because there is no direct way to draw the pyramidal shape, I got stucked. Thank you so much !

 

[rafa040]

use antenna design kit for horn antenna ..

 

[ms.doijode@rediffmail.com]

hello, i need to desin the horn antenna for 800 MHz with 30 cm in length. can you give the parameters.can plese give me the graphical design for these parameters.

 

[drkirkby]

use antenna design kit for horn antenna ..

That's certainly a start and gets one a horn drawn easily, which is paramaterized so you can change values easily. But if I recall correctly, one can only specifiy the frequency and waveguide size of the horn - not the gain. At least that was the case with the version I used - perhaps an update is a bit more clever.

Dave

 

[ms.doijode@rediffmail.com]

Hello,
my laptop specification are 2GB RAM, 32 bit windows ultimate operating system and i dont have the graphic card in my laptop, i think for this reason i am not able to install the HFFS,CST softwares , plz anybody can suggest me what is the configuration (Plz in points) required for any laptop or desktop.

i am planing to take a desktop.

 

[drkirkby]

For those interested in building horn antennas, take a look at The W1GHZ Online Microwave Antenna Book

http://www.w1ghz.org/antbook/contents.htm

by Paul Wade, W1GHz (ex N1BWT). Chapter 2 of this free book

http://www.w1ghz.org/antbook/chap2.pdf

is on horn antennas. Paul has written a program, called HDL_ANT which used the approximate dimensions from a set of tables by Cozzens to design pyramidal horn antennas with gains from 10 to 25 dB. The nice thing about this program is that it can create a postscript file which gives the layout on paper, so you cut the paper, put the folds where it shows, and you have your horn. But it wont run under 64-bit Windows 7, but it does work under 32-bit XP. There is a link to both the binary and source code of HDL_ANT at the "Software" section at the bottom of http://www.w1ghz.org/antbook/contents.htm

Paul gives the reference for the tables

D.E. Cozzens, "Tables Ease Horn Design," Microwaves, March 1966, pp. 37-39.

If you use Paul's program to generate a postscript file, you can print it using http://www.lerup.com/printfile/ I would check the dimensions with a ruler, since your printer might not give an exact 1:1 reproduction. I found using that utility worked 100% from the postcript file on my Xero postscript printer. But if I printed the PDF at

http://www.w1ghz.org/antbook/chap2.pdf

then the scaling was in error by about 5%. If you don't have a true postscript printer, then http://www.lerup.com/printfile/ can apparently use Ghostscript to print to other sorts of printers. I have not tried that, as my Xerox is a true postscript printer - not one of the cheaper ones which emulates postscript.

If anyone is aware of a better source of design data for Horns, I too would be interested, although Paul is held in very high reguard by the amateur radio community, so anything he writes can be trusted, unlike a lot of the junk written by radio hams - especially on antennas. Paul knows his stuff!

Dave, G8WRB.