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59 Threads found on Cst Cpw
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
Hi there, I would recommend you to put required boundary conditions. As, parallel plate mode and slot mode are easily excited otherwise. I go for wave guide port size as explained by cst , you can see in cst help section by pressing F1. However, keeping electric wall in sidewall helps to suppress the parallel pla
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
Hi all, first of all i would like to confess that i am a newbie in rf design and i may ask very silly questions. please forgive me and i am waiting for your responses. I am trying to design a pifa and/or ifa antenna (all of them are PCB microstrip antennae) in cst design environment. when i was investigating reference example designs on inter
Can someone tell me how to design a microstrip antenna with a triangular patch with cpw feeding on cst??
I think cst and HFSS can have very accurate results. Could you upload your cst file?
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
Hi, I want to design spiral antenna by cpw-fed. please, help me how to design this feed in feko and cst softwares.
To first: discrete ports need to be deembed from s-paramters results. It's possible in cst with macros. But just consider the exication, the waveguide uses a TEM or QTEM mode to excite, in a case of discrete port, it's a current and, depending on discrete port setup, at one point, one face or one edge. Nevertheless it's possible to use discrete por
i'm using cst 2013 , check pic , solver is run it. download file
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 (...)
Dear all. Although this topic has been discussed many times before, unfortunately, I have problems still. I have chosen different variants of port sizing(generally as in tutorial - see 1.png), different boundary conditions (the most appropraiate for this waveguide are as in 3.png ), but the desired result (see 2.png, taken from curso
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
Try to model sma connector and put waveguide port on it. -> here you can find my example at cst2011 with modeled SMA connector
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 (...)
in cst microwave studio for a microstrip patch antenna cpw fed is to provided, how to go for the design , since in tutorials no proper method is suggested, please help
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 (...)
for probe feed case Quasi TEM mode exist at port. in cst you can see when simulation completed go to port mode option and see the e field and h field then cst automatically shows there Quasi TEM mode is present.
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:
This is an intruction from cst_user_guide hope it
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
Hi KhangKhang Some how u have to manage around 50ohm while changing the width, height etc. In my option as far as cst is concern, to normalize to 50ohm would be technically sound but not good enough. As an example if u normalize to 50ohm and if u manage to get port around 50ohm will give you different results.
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
Anyone can give me an example of simulation in cst of a coplanar microwave circuit? So I can see how to setup the ports Thanks
hi dears, if anyone knows how can i simulate an antenna (cpw-fed with ground plane) ic cst Microwave studio, please answer me. yours
I think for that kind of structure, EM softwares such as IE3D, cst m HFSS is better than ADS
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