helical antenna design

HI

[align=justify:bc8cce13fa]Can somebody tell me Is helical antenna is suitable to design at a frequency range between 8-9 GHz. I am using 4nec2 for the design of antennas but how can i design a helical antenna on this software, there are no manuals or tutorials associated with this software. Can u also please tell me a link from where i can get this tutorial or manual. [/align:bc8cce13fa]

Try to use any nec manual and learn on 4nec2 examples. Helical structure can builded manual;y but it's very hard. The best way is to use complex structure bulider(he is in 4nec2/exe folder and named with build.exe). Patch, Plane, Box, Cylinder and Parabola can be modeled with this program.

On 8-9Ghz helical antenna is very small and very hard to precise realization. Don't forget impedance transformer for matching to 50 ohm.

try this software WIPL_D

I advise you try to solve it in CST,HFSS,FDTD!

Hi ping-pong,
I thing that do your problem.I attached a file who easy calculated Helical antennas.If you wont more precise calculation you must be used HFSS and CST,etc.

hi,
i don't think that the helical antenna is a good choise for 9 Gig.
It depends on the application, but you could look at....
for example a "coffe can" antenna which is also simple to build. You can simulate it with 4NEC2.
OR, you could think at the horn.

It is up to you.
Regards

I saw a article in microwave journal. They did a Helical Antenna by using LTCC for 900 and 1800 MHz. I dont know that using the same technique, it can be done for 8 GHz or not

Helical antennas are very wide band. The only problem is that their beam pattern varies over the frequency range and can split into major lobes and even go perpendicular to the helix axis at some frequencies.

http://www.kyes.com/antenna/navy/rpatterns/antena05.gif

If you want design Helical antenna you can assisted with matlab 7,
Also I attach calc that was helpful for me

But for best results you need matlab!

David

Hi guys, can anyone send me information on Helical Array design?

Thanks

what diffrenice between patch antenna and helix antenna?

hi, I'm looking for a vendor that would supply a helix antenna with <1dB axial ratio, and a frequency band of 800-1000 MHz. If anyone can help me, I'd really appreciate it.

anyone help with a 433MHz helical antenna design?

Thanks a lot!

The geometries are different. Helix antenna has wideband characteristics, otherwise patch antenna hasnt.

Regards,

anyone help with a 433MHz helical antenna(NMHA) design?

Thanks a lot!

Pls refer to Antenna textbook, such as Krauss or Balanis. Helical antennas design are described there....
:)

Pls refer to Antenna textbook, such as Krauss or Balanis. Helical antennas design are described there....
:)