UWB antenna

[sandeepv 10]

Hello friends,

 I have designed a patch antenna shown in the attached file, I got the VSWR plot which is not identical to the one shown in the paper. How can I reproduce the exact graph in hfss. one more thing how can I plot the gain vs frequency plot given in the paper.

 

cao2011.pdf

test5.hfss

[Admin 2545]

 

[sandeepv 10]

Hi, thanks for ur reply.... in the gain vs frequency graph,  gain value is positive over the UWB, but in your post after 9 Ghz gain drops to negative value... I think in the paper they plotted peak gain vs frequency rather than total gain vs frequency.please correct me if i am wrong. Have you got the similar VSWR plot in the paper ?

 

 

 

. n

[Admin 2545]

Yes you are right..
 

[sandeepv 10]

even here also we are getting negative gain  around 9 to 11 GHz which is undesirable ...... can't we reproduce the exact results from base paper ?

[Admin 2545]

HFSS>Results>Create>,> .,>,,,,,etc

in CST is another situation,,,!!!!

[Admin 2545]

it is better ...

[sandeepv 10]

Hello,  good evening, did you find any mistakes in my antenna design steps..  if so please correct me .  if I  repeat the same steps to design any antenna will it give me good practical result?. 

[Admin 2545]

[sandeepv 10]

Thank you... i will modify the design and will post it soon ...:)

 

[sandeepv 10]

Hello, I have modified the design ...I used PEC cap on the wave port to avoid warnings from hfss because only lumped ports can be defined inside radiation box... The VSWR plot is now degraded a lot at lower frequencies ...i am attaching the file  please checkout it.

test5.hfss

[Admin 2545]

[sandeepv 10]

so you want me to stick to the previous design ?

[Admin 2545]

[Admin 2545]

[sandeepv 10]

 

No, it's not good enough ...I have got better VSWR response when the wave port is not defined inside radiation box( the plot is available on this page only)

 

the above image is from the base paper .... there were three dips at near 3GHZ, around 6.5 GHz, and around 10.5 GHz. I want to reproduce exact VSWR response. What should i DO?

Edited March 2, 2017 by sandeepv

[Admin 2545]

,,,but this it"s CPW monopole antenna with quadruple band-notched..!!!

[sandeepv 10]

i have designed several antenna ...i am posting them below ....i am facing the same problem we have been discussing

testantenna1.hfss

10.1109@ICSCN.2015.7219914.pdf

[sandeepv 10]

bugaj2016.pdf

2.hfss

[sandeepv 10]

Project15.hfss

3560938.pdf

[sandeepv 10]

a.hfss

mop.27651.pdf

[Admin 2545]

48 minutes ago, sandeepv said:

so you want me to stick to the previous design ?

,,,no,it"s another kind of boundaries box...!!!!

[sandeepv 10]

ok, ..please tell me what I have to do in order to reproduce the  base paper results................

[Admin 2545]

,,,boundaries,,,!!!!

[sandeepv 10]

yes, boundaries i too agree they are important, but i am defining the boundaries as mentioned in HFSS hand book still nothing happens .