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Vivaldi Antenna, Simulation and Meaturment results,

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vivaldi hfss parameterize

select substrate surface -> field plot -> mag or Vector of E/H field

Regards,
 

antenna simulation projects

Thank you!
I can do it !
Another question,How to setup the exitation of the phased array antenna for the beam steer? I know it needs phase shift between elements for the beam scanning,
but how to setup the port in HFSS?I have tried to set different "source setup" of different elements which have the same amplitude but different phase,but the result is wrong!Some articles have presented the methods of "master/slave boundarys" for phased array,how to do it?
 

received e field of vivaldi antenna

dear guanghua
can we talk about the array simulation of antenna ? my mail is :fanqikai@163.com
 

vivaldi antenna equation

can u help me in designing vivaldi antenna using HFSS
how to model taper...what uis the formula for it...how to model in HFSS
i need to design in X band
 
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comparing antenna simulation results

I have download the .sat file. I try to simulate it using Micro-Stripes. But I don't know how to make the port and excitation in this simulation. Anyone can help me?
 

4 antenna phased vivaldi array

hi all

if any one have the hfss help or any text about "equation based drwing", i think that it is so usuful for all. please upload it for all.
best regards
 

hfss 9 trial version

in ur HFSS project why have u defined frequency multiplier = 2 because that we do when we r defining a symmetry plane..that could be a problem
 

antenna vivaldi cst download

hey guys

drawing exp curve in HFSS is easy using equation based surface feature

u all can use it instead of going thru AutoCAD tools

if u draw using HFSS u can do optimization of curve to get the results
 

vivaldi antenna equations

Hello KMPA,

I am trying to design a vivaldi antenna in the frequency range 300 to 800 MHz. I am unable to obtain proper dimensions. Could please upload any material which you have referred, to design yours. I am also getting difficulty in designing proper stipline to slotline transition.

Thanks in advance,
Habeeb.

Added after 1 minutes:

Hi SAJ25,

Its very easy to draw, if you have HFSS v.10

Habeeb.
 

vivaldi antenna simulation

hi Habeeb
whould you please tell me your equation that set in HFSS 10
regards
 

Re: vivaldi antenna, hfss

Hi,eirp
I am also using CST to do vivaldi antenna simulation.
the port in physical situation is coaxial to strip transition.And i set a waveguide port where the width is 10 times of the strip's width and the height is 5 times of subtrate's height.But the S11 i got is bigger than 1 at some frequencies.Can you help me?

eirp said:
Here results calculated by MWS.
The energy has settled down to -40dB.

What port you used in physical realisation? Coaxial to strip transition?

Cheers

eirp

PS: I had to slightly modify the port region by adding small strip feeder. However this won't affect the results a lot.

PPS to gregb3d:

In MWS you can simply create analytical curves using VBA macros accessible from MWS GUI. I don't know if HFSS has also such tool, but it's very practical
Click to expand...
 

Re: vivaldi antenna

KMPA said:
Hi to all,
I designed a Vivaldi antenna with taper rate of { exp(0.15*z) } in the 500-2500MHz frequency range on RO4003 substrate with Er=3.38 ( Fig.1). The simulation results (Fig.2 and Fig.3) that carried out with Ansoft HFSS V9.1 estimate very good performance (VSWR < 1.6:1 ). but when I construct this antenna and measured input VSWR of it, I saw that VSWR is greater that 3:1 ?? (Fig.4 and Fig.5). I simulate this structure by assuming construction tolorances but simulation results didn't change. I beleave that port definition is wrong.
I upload my structure .sat file, Can anybody simulate this antenna with other softwares (CST or IE3D or ...)

Thanks in advance
KMPA
Click to expand...

Can you please tell me how you have given feeding to antenna??
I downloaded your .sat file,but I am not able to decipher where and how to give feeding.......
 

i feel that you dont calibrate your network analyser.please chek this matter
 

Re: vivaldi antenna design equation

I design ultra wide band micro strip antenna using HFSS , when i make to it export *.sm3 to run it on CST i get different result
can anyone help me it's my thesis in mater
thanks all
 

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