i have some problem about this question ,i hope somebody can help me .it is a balun for sprial antenna ,but i do not want to simulate the balun with the antenna ,also i do not kown how to set the output port in hfss . plz help me !
hi hausan,
i have simualted balun separately by using wave ports at two end of balun ,mine was microstrip to slot line transition so i used 50 ohm wave port at microstrip line and 120 ohm at slotline side. i think you can try it for yours
i try with your advise ,but has a alarm : internal face can not use wave port ?
well when we use waveport we must either do build a radiation box in such a way that its one surface touches wave port. the warning you are telling is because of that.you can eiter build radiation box in this way or you should build a box of same size as that of wave port and assign that box pec amterial then you will not get this msg
hi aniakhan
i want to send my project to you ,could you help me check it ?
what you want to check? i can open it prpoerly as i have hfss 12 now not 14 so u can post your results in simple ppt here to talk.
- - - Updated - - -
also another thing if you have some question about antenna then post it on n RF, Microwave, Antennas and Optics forum of edboard because normally people don't saw em simulation portion therefore not possible to get answer soon.
thank you ，my friend
- - - Updated - - -
i care about the ports set,i should ensure it is right,or it will effect my other work.
hi ,aniakhannormally if you assign a specific impedance to wave port at end of wave port assign procedure then its dimensions will not matter but normally wave port should be of diemsnion 5*w and 4*h. one thing if you know is i have made transiotional structure as balun previously but now i am interested in exponential tapering of Microstripline i know formula for tapering of M/s line and exponet factor as well but i am not finding exponet factor for ground plane tapering ,if you have any idea please tell me.as yours was k.balun so i thought may be u know..
i have not worked on many baluns but i will try to complete exp balun and then attach model here soon.
thank you ，my brother！
i have make a ppt .hi,
i have lower version of hfss and it is not simulating in my system because of some software problem,why dont you make a ppt having all results like s11.s21 and s22 and image of your balun??or attach them in fig format i will have a look and tell you.
i have make a ppt .
well your results are correct as far as S11 and S22 are concerned having value below 15 .do you have to connect it with antenna??if yes then any antenna with RL less than 15 will do good with it. but S21 is not good it should be maximum 1 db otherwise when conect with antenna less power is transmitted. so try to improve it. i have seen your model in hfss you can also use lumped port for port why have not you used them??although it does not matters more but lumped ports are easy to use. for lumped port just use any rectangle of any size and give it lumped port
do you have any paper related to such type of tapering??? how did you manage tapering constant (its for my curiosity)??
i find a paper in google .
Design and implementation of wideband baluns for Archimedean spiral antennas
https://eprints.qut.edu.au/49773/1/Kalyany_Vinayagamoorthy_Thesis.pdf
i hope it can help you with you study.
We use cookies and similar technologies for the following purposes:
Do you accept cookies and these technologies?
We use cookies and similar technologies for the following purposes:
Do you accept cookies and these technologies?