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37 Threads found on Cpw And Cst
hello frds, recently i designed conventional cpw fed UWB monopole antenna in cst, i dnt know whether my wave guide port dimensions to excite the cpw feed are correct or not. can anyone simulate the designed antenna and provide remarks.
please help me by providing cpw feed port dimesnions in cst to exite the microstrip antenna
please provide the necessary design steps to design sma connector to feed cpw in cst
hello how can I do the excitation for conductor backed cpw??? which kind of port???
Hi, I want to connect a microstrip using Copper with a Roger's 3003 substrate to a cpw with Niobium as the center conductor and ground plane and a silicon substrate. I have connected them currently using bond pads, but does anyone have any suggestion for a better way to connect. Also, when i specify the ground plane (...)
Hi Friends Recently I have designed a EBG cell which it's reflection phase around 3.5 GHz is zero. In order to use this structure I've used a cpw antenna with resonant frequency of 3.5 GHz. The problem is I expect a resonant frequency of 3.5 GHz for whole structures (maybe with some ripple), but the resonant frequency is shifted to 4.5 GHz and som
There is a how-to page on FEKO's website on how to create a cpw feed in FEKO.
Hello, I am currently trying to simulate a cpw resonator @ ~7GHz using cst microwave studio. I've attached the cst file in case people want to help. At the moment I'm not getting any good results, the S21,S11 parameters are flat, no peaks or dips. Not sure what I have done wrong in my design, the ports I defined are larger than the (...)
Hello, I am simulating a cpw to CPS transition in cst using transient solver. I am not sure if I am setting the port parameters correctly. I tried two appraches:- 1. Defining multipin port and setting up potentials. (But this means I am manipulating my simulation and only getting the desired even mode whereas in (...)
Dear All, I have imported a Differential trace into cst MWS, and I am using "Time Domain Solver" to get S-parameters and TDR measurements; the Problem is that we are getting wrong results.. we have used Polar software and the impedance is 100 Ohm differential.. but the TDR in cst MWS show a 3 Ohm (...)
Hi. I´m doing simulations with a patch antenna, fed by a CB-cpw line... and though I thought i knew CB-cpw well... Some doubts have shown up... Your help will be kindly appreciated. I now there are more modes in this structure but i guess the usual propagating one is the CB-cpw mode, from center strip to lateral (...)
Hi everyone, I have a little problem, could you help me ? I consulted a paper about dual band using coplanar waveguide, I simulated it in cst, but the result seemed very diffferent from that paper, I mean it was wrong. Setting port is ok, beacause E at port is QUASI-TEM and similar to my privious cpw simulation. (...)
Hi guys, i just model a basic cpw. but i could not get the correct s-parameter result. I suspect it might be the port. Do i need to add space? *background property* below is the thanks
Hi guys, I have this project. A cpw model has already been constructed. and my next objective is to perform RCS on it. Can someone please advice me on how to do it? I am using cst MWS software. Thank you. Please advice.
I have simulated conductorbacked coplanar waveguide in cst. However I am getting only odd mode fields and not cpw mode ie even mode. Any Suggestions
Hi, I have been reading a lot on cpw design from many sources but I don't know how to design an open end stub or a T on cpw. I can use ADS or cst for the design but I don't know where to start to select the dimensions of the stub since many equations take into account the gap but not the actual lenght of the stub. Any guidance is much (...)
Hi, I am simulating a cpw in HFSS whose dimensions are: width = 50 um, gap = 30um, and substrate height = 430 um. Using the suggested port sizing from Ansoft ( Height = 4h, Width = 3(2g +w) ) gives me a port impedance of ~8 ohms. The only way I currently know of increasing port impedance is to increase the port size. I am worried this will lead
well i am doing my dissertation in Fractal Slot antennas. Currently i am designing Minkowski slot antenna and i am using cpw feeding. Please anyone tell me how can i feed my antenna in cst?? thanks in advance
well i am doing my dissertation in Fractal Slot antennas. Currently i am designing Minkowski slot antenna and i am using cpw feeding. Please anyone tell me how can i feed my antenna in cst?? thanks in advance
Hello, I'm testing cpw these days. I heard there would be a way to calculate TL attenuation coefficient(alpha) by cst eigenmode solver with periodic boundary condition. The TL is cpw and I'd like to see the attenuation change according to the frequency sweeping. With other solvers I couldn't get an exact alpha due to the (...)
hi ravi8331, how can we define cpw ports..... Added after 1 minutes: hi ravi8331, for my antenna,am getting TM it correct Added after 1 minutes: hi ravi, do u have idea about IE3d software.....
i have simulated a cpw antenna from a paper with cst, but my simulated result is not the same with the paper's at all. Who can help me to check my cst file?I don't know what's wrong on it.
I am trying to implement a cpw antenna for uwb frequency range.I have drawn the structure but im finding it difficult to define ports. Can anyone tell me how to define ports for a cpw antenna.....width of the feedline=3mm and spacing=0.3mm im enclosing my cst files here in Hi, try:
Hi All, I see that not many work on a cpw fed vivaldi design. I have done some literature survey and couldn't find any reasonable designs which can clearly give me the dimensions. I am planning to design and fabricate a very simple Vivaldi in UWB range of 3.1-10.6 ghz. Please help me if any of you already have any designs in (...)
Does anyone has significant experience on how to excitate UNSHIELDED finite width cpw and CPS in HFSS and cst MW studio? I have already seen the tutorials on ports and all the stuff related, but it wasn't usefull in my case, i did not get the rigth excitation. Therefore, is there anyone who knows how (...)
Is there any principle, say the width and height, when setting the cpw port in cst. i noticed the quite different calculated Line Impedance is obtained for ports with different
If you are using PEC boundaries, the port mode solution probably found a waveguide mode that could possibly propagate (if excited by the problem). You have to pay attention to your boundary conditions, and whether or not your cpw grounds are tied to the PEC wall grounds (if that is your boundary condition). You might want to try a multi-pin p
just draw your cpw antenna, and assign a waveport as an excitation. The wave port should be about 3*h above and below the substrate, with h being the substrate height.
Hello, I am trying to simulate an asymmetric cpw which consists of only a ground plane and a strip. The manual suggests that the port size should be about 3-5times wide of strip width. and it is trustable for conventional cpw and microstrip line structures. However, for this asymmetric (...)
Hi, How I can correctly define the port for the structures like in the photo? I just defined the port as +-4*feeder width. cst gives that "some higher modes are not considered. This leads to an inaccurate energy balance. Consider to reduce the port size or decrease the upper frequency limit." The port size seems to be ok. Also the upper freq
1) how to determine the input impedance of cpw and slot antenna separately in cpw fed slot antenna structure 2) what should be the length of cpw, so that i should only get the impedance of slot in cpw fed slot antenna structure..... ?? Should it be be lambda/2, coz it will not effect the impedance of (...)
The way to define a cpw port is included in the getting started maunal of cst MWS Suite 2006.
Hi for version 5.0 there is one example in the example directory for spiral inductor showing how to set cpw port and its under:examples/transient analysis/s parameters/coplanar devices. Regards
Sonnet is a 2.5D simulator and cst is a 3D simulator , just like the Ansoft designer and HFSS. Sonnet is used to simulate the planar circuit such as microstrip , cpw, strpline circuit etc. and I think it is very accurate and fast cause I have used it for a long time .
Hello, I would like to perform a simulation of simple coplanar waveguide structure to obtain a basic parameters like capacitance and inductance per length. I need those results to compare with results of my FEM simulation . Is it possible to simulate those parameters in HFSS or cst? I have already basic experience in those simulators. Thanks,
Hi all, I am simulating a normal cpw ( No Ground plane ) in cst MWS. I am using open boundaries in all directions. Port size is enough to accomodate the field patter ( 5* height and 3*( Width_center_conductor + 2* Gap)). I get the designed line impedance of 92 Ohm. I notice a curious thing. Background matrerial is "Normal" (...)
Hello, I'm using cst v.5. I tried to simulate simple structure. It is cpw ended with slot antenna. I have ground metal as well. I've defined the waveguide port as six times the feeder width. The line impedance in 2-D result is only 14 Ohm. It should be around 60 Ohm. Any help please.