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59 Threads found on Cpw Cst
hi everyone,for the last one year i am working on designing a UWB antenna in cst. i have few doubts on cpw port dimensions in cst mw studio. 1. is my port dimensions to excite the cpw are correct ? if not please correct me 2. what are the details we need to consider before defining wave port dimension to excite (...)
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.
Can anyone help me regading feeding of cpw fed antenna.
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
please help me to design sma connector for feeding cpw
I'm simulating a grounded cpw in cst, I want to apply a proper boundary condition to it? who know what is the suitable boundary condition? what envirement i shoud use in cst? note that i'm simulating a Gcpw fed Horn antenna if this effect the boundary condition of structure... tanks
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 and center conductor as Ni
Ok let's try: 1) So, my first question is which feeding port is most suitable for this type of design.Discrete port or waveguide port.: It depends I think, if you have just your antenna, waveguide excitation would be correct if you use for example some microstrip or cpw as feed. In your case, I recommend a discrete
Can someone tell me how to design a microstrip antenna with a triangular patch with cpw feeding on cst??
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
Hello all I am trying to design a Bias T using cpw transmission lines in cst microwave studio. I am confused with the DC blocking. Please have a look at the attachment. I am using quarter wavelength coupled lines for blocking DC but on simulation the RF DC isolation gets worse on adding this DC block. If I do not use any DC Block then RF
There is a how-to page on FEKO's website on how to create a cpw feed in FEKO.
Discrete ports are not unsuitable for WAVEGUIDES like cpw. That's why you should use a waveguide port. From the point of definition of a waveguide port, it makes no sense to placed it somewhere inside the structure. Because how you want to excite your real cpw inside? One reason for the error could be: If you place your waveguide inside, both sides
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 (...)
i am new to antenna design as my PG going on i have to work on antenna design. Currently i am working for antenna design in cst MWS software, but i dont know how to create slot on a patch over a microstip antenna. plz somebody help me for slot design. I am thankful to them.
I want to create a wave-guide port for following structure. It is 'cpw with ground' or 'grounded cpw . What should be the dimensions of wave guide port? Please see the structure below. 96793
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 reality I might have both
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 impedance. I am new to cst MWS, it (...)
Can you maybe upload your design, because it's not so easy to answer this question from just some picture. E.g your result would also be interesting. ------------ Sorry, i see now your file! ;-) - - - Updated - - - Some hints: Be careful with symmetry planes, a cpw as more than 1 propagation mode. In your case there ar
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 and bottom ground planes. (...)
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. Boudaries conditions a
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.
Hi, I have to implement patch antenna on two substrate layers (Er1 & Er2), this antenna will be fed by a cpw there's someone who can tell me how i have to make a weveport (or discret port) in this structure in cst or HFSS thk U 66794 66793
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
Hello Please, how to feed these cpw antennas in cst ? which port should i use ?
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 (...)
If you press F1, a help menu will pop up. Search for cpw. There should be some info on how to setup the feed.
hi Firkin pls read this paper it may be help u a little but i dont have confidence that u can use for U structure because hiss and cst have problem with small antenna design A 60-GHz Millimeter-Wave cpw-Fed Yagi Antenna Fabricated by Using 0.18-μm CMOS Technology by Shun-Sheng Hsu, Student Member, IEEE, Kuo-Chih Wei, Student Member, IEE
hi friends I need a help from you I want to design back to back cpw to CPS using balun. I have a problem with exciting the coplanar waveguide using waveguide port using multipin method in cst. can any body help me how to define waveguide port for cpw? thanks advance Added after 1 minutes: hi i have
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
Hi, everybody, I encount a problem in cst when I try to excite the grounded cpw. When I set the boundary condition of the port side to be PEC, the port field of cpw looks right. But when I set the boundary condition of port side to be open, then the port field distributuion of the cpw becomes wrong. I don't know where I (...)
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 port impedance (...)
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:
Hello, how should i define a port for a grounded coplanar waveguide in Microwave studio?
i m simulatin a cpw antenna without groundplane. I am using cst 2006B as the tool. I define the waveguide port to excite the model. The line impedance shown in the 2D results isnt accurate. Any suggestions how to excite the model with 50 ohm waveguide port whatever the stripline impedance is??
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 IE3d/cst. I would be
For cst did you try a multi-pin port? I think this is a special case of the waveguide port. You define the center conductor as signal 1, and the shields to be signal -1. I think you reach this feature in the Waveguide Port definition window; there is a button called "Define Pins" at the bottom of the window that then lets you click on the edges
I my opinion the with and height of cpw depends upon the choice of frequency rage, higher the frequency lower the width and height of port. A good idea is to adjust the port dimension near 50ohm.
Hellow Whenever i design cpw port in cst, it comes up in error message "Some higher order propagating modes at port 1 are not considered in time domain calculation. This probablay leads to inaccurate energy balance. Consider reduce the port size or upper frequency limit" What does this error message and how to solve it. Does it has any effect o
Hi, I had a quick look at your structure. The Vias in your model are Vacuum. Are you sure this is correct? Furthermore the Ports 2 & 3 are directly located at a GND bridge. Because the GND bridges are not connected with the main GND (vias problem) the port mode solvers sees some "floating" metal plates right at the port. Please change this. Fina
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.
hi, is there ADS free/student/trial version simulation tool? OR ANYTHING SPECIALLY FOR cpw ANTENNA STRUCTURES?
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 cpw with the same strip width (W), there is a great (...)
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