Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
Hi, I faced a problem in exciting a coaxial cable in XFDTD. How do you excite this cable when you have an inner and outer conductor? I've tried to put a voltage source across it but result is funny. I'll appreciate it anyone can send me an example file on it.
Thanks in advance!
Re: how can i simulate TEM TM TE wave incident FSS WITH
You can't. HFSS does not give you this information nor allow you to specify what modes to be input to the port.
hfss microstrip transmission line
That is right. Using alpha to calculate loss will give you a value very similar to what S21 gives. Provided no higher order modes...
hfss simulation of microstrip transmission line
I had a brief look at your simulation and found a few mistakes. Since you're simulating over such a broadband and your structure is so tiny, why don't you break your simulation into different bands? Your absorbing boundary is definitely not big...
non-zero result s21
There is definitely something wrong with your simulation. Even if you don't get perfect 0 for s11, it should still be nearly so. Why don't you post your file and then we can take a look at it?
array gain
I assume you're not scanning since yours is only a small array. In that case, stretch your element to element spacing to 1 lambda, or about there. Reason is you get slightly more gain out of it and it's easier to layout the feed lines. As for how to do corporate feeding, there're...
microstrip patch antenna array
Of course it's not ok, how can you get almost the same gain for two and four elements. For two elements you get 7dBi is ok, but for 4 it's not.
Re: How a Power Amplifier should look using a network analyz
This is a strange question. You can get them from any power amp application notes or technical papers.
Re: help meeeeeeeeee!!
I thought I've sent you an antenna model that works from 88 to 108MHz? Basically you just have to adjust the arm length of the dipole to get even better return loss. Or you can change the shorted portion at the coaxial outer sleeve.
I'm not sure what parameters you...
hfss port excitation send receive
The E-fields on the different ports may be differently oriented. For example, the E-fields for one port may 'diverging' at one instant, and the E-fields for the other port may be 'converging' at the same instant. Both will still be the TEM mode but phases are...
Re: help meeeeeeeeee!!
You have not included in the excitation in your simulation so how do I know that you have simulate correctly. Pls attach your full simulation (with the excitation here).
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
