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56 Threads found on Coaxial Feed Cst
Hi.. I would like to design coaxial feed microstrip patch antenna. How should i define the port at the feed point.
Hi freinds I want to know how to design balun coaxial feed in cst MWS to feed two archimedean spiral antenna. I need some information about balun coaxial feed. Plz help me to design baluns coaxial feed in cst. thank you Regards kaanee
Hi.. I'm newbie here, :D I would like to re-design fractal microstrip patch antenna for my final year project from the attachment file. but i dont know how to design the coaxial feed for it antenna in cst. How should i define the port at the feed point. i'm using cst software to design. Thanks A Lot.. :) (...)
Hello, You should design the feed alone and put two ports, one each at either side. Simulate for wide frequency band and look for S - parameters. They should be within the specified limits. As for physical dimensions for coaxial feed, you may look on internet for common SMA connector layouts. Most common SMA use PTFE as dielectric to get 50 (...)
Hi guys, I am designing a monopole with two cables attached to it. The ground plane is on top of the substrate and i'm hoping to feed the monopole by a coaxial feed from the bottom of the substrate. I have tried 'picking the face' of the bottom of the monopole and creating a waveguide port, however it comes up with the following (...)
I am trying to feed a microstrip patch antenna with a coaxial probe feed. Till now I m getting nothing although I have read the circular patch antenna tutorial provided in the help manual. Could anyone please suggest the correct method. I am using cst MWS. I have attached the file as well... Awaiting replies, Regards
Hi there, can anyone advise me on how to simulate a simple FM monopole printed on a piece of Mylar fed by a microstip line in C/S/T M/w/s? How should the feed to the microstrip be modelled? Do I have to model a coaxial feed or is there a easier way out of this? Any advise will be very much appreciated. (Attached Geometry in M/S (...)
Hi, I am trying to model a coaxial fed antenna using my own code but I don't know how the feed is modeled in HFSS or cst. Does any body have any idea how the feed is modeled in the case of waveport. Thanks in advance, BR Adel_48
I am simulating a mono antenna feed by coaxial line, and find that different length of coax line will lead to different S11 parameters. What length on earth should be? I have no idea to find the principle, Can anyone help me? Thanks very much!
Hello: usually the gound on lower side of the substrate is of thickness .03-.05mm. But if in the tutorial of cst "rectangular patcha antena", ground is about 3mm. It seem that thickness of ground plane has no effect on the result or i am missing somthing. Another quesiton: What should be the length of coaxial feed in (...)
after many hours studying the tutorial and getting started and saw many cst examples...i managed to simulate the waveguide port. My question now is: 1-what is the best template for patch 2.4ghz antennas with reflector distanced more than 6mm from the PCB? 2-to use the waveguide port in patch antennas, the coaxial feed start in the (...)
hi nadabro I also need the details about balun coaxial feed in cst MWS. My model is two arm archimean spiral antenna . I want to use baluns coaxial feed. I don't know how to design in cst? Did you get any idea about it. Plz can you share with me. thank you
i have a slot-loaded microstrip antenna shown in fed by a microstirp line feed.i think i have to define a waveguideport.but i can't do this.i looked tutorial pages but it told the coaxial feed port.what can i do?where i define the port;next to the feed line? is it same with coaxialfeed?
Hi all, I am designing an antenna array, on cst Microwave Studio, consisted from 8 rectangular patches printed on a surface an a cylinder with coaxial feed. When i am trying to simulate the geometry i have an error : Waveguide ports must be aligned with Cartesian coordinate planes for the transient solver. I know that the ports must (...)
is coaxial or aperture coupled feeding of microstrip antenna possible using cst?
I really need help on designing a coaxial feeding using cst. I know that I have to create 3 cylinders (inner, outer and dieelectric) but I did it wrongly (especially in doing insertion of inner, outer and dielectric) . Can anybody help me to explain step by step how to feed the coax. Thx in advance.
can any one say how the parameters like inner and outer radius of coaxial feed is calculated... i m working on cst ... what r the equations to followed ... tell me a text book which has direct equation for finding this parameters.. i working for 2.45 Ghz frequency.... plz help quick...
hello guys, im designning circular microstrip antenna for my final year project.can u guys help me how 2 design the coaxial feed for it and how to determine the position to place them on my circular using cst software. plezz...:smile:
please anyone tell me and give me some link how to get the location for feeding point for coaxial feed probe in circular microstrip using cst and 50 ohm coaxial probe....:-?
Hi all, I am trying to simulate a patch antenna using with a coaxial feed to the patch, the coaxial feed has a conductor, substrate and a shielding. When i place a port on it and run the simuation, i get the error that port 1 is completely filled with metal, I tried a suggestion on the forum to push back the electric (...)
Im a beginner in desperate need for help. I am designing a slotted bow tie patch antenna with a back coaxial feed which I have already created in cst. When a transient simulation is run, I get a practically non existant efficiency. When looking at the surface current, it appears that very little current is flowing on the patch surface. Where (...)
Dear Suraya, feeding of spirals through coaxial cables is very tricky, as you need baluns (check Balanis book for that). I would suggest you simulate first with a discrete port between the two arms of the spiral, in order to check the antenna behaviour and then study some proper way of feeding!
i am designing monopole antenna using cst mws. i am new to cst software.anyone please tell me the steps to design coaxial feeding with sma connector.. i use fr4 substrate and PEC for antenna
Hello , I have create a dipole antenna using cst MWS but with a antenna wire template , i have put the port but i want to put a coaxial cable as feed transmissin line because i want to see the real result for the simulation. Anyone can help in creating the coaxial cable ? It's truly urgent !! Hope that this post (...)
Here attached my example project at cst2011 with SMA connector. Enjoy Dear bututa77, thank you for your great answer, i have a question that can i use this sma port to simulate as a coaxial feed ?
I have modeled a microstrip rectangular patch antenna with coaxial feed, if that's what you're looking for I can upload it... Let me know
Hi everybody! i designed a patch antenna with coaxial feed by cst, but after simulation, i get a strange results for s-parameter, and gain is about -200 dB and more. can somebody tell me what is wrong with my cst design. f =1.9 GHz , L =22 mm, W=31 mm, dielectric constant 11.9 , h=1.5 mm.95048
Hi guys, I am trying to feed a microstrip patch antenna with a coaxial probe feed. Till now I m getting nothing although I have read the circular patch antenna tutorial provided in the help manual. Could anyone please suggest the correct method. I am using cst MWS.
Hi crazy_dude 1. There is solution to your problem go to port click left, properties and Insert the distance from the WG port to the patch that?s the way to get your Input impedance (dembedding the WG port). You can see it in the examples In patch antenna if you install them. 2. You can do it also with coaxial input. 3. Go to m
hi, I'm looking for best method for simulation of "UWB Antenna" including several patchs on a thick substrate and 2 coaxial feed line,except FDTD. whether FIT method is suitable for this? regards.
Hi steven, How about trying the same model with a "real" port. I'd suggest you build a coaxial waveguide to feed your monopole. It shouldn't be so time consuming in computation (Don't forget to mesh it right in order to get the right impedance) In that way you will be able to compare discrete-port results with "reality". Good luck, P.
Hello! I'm trying to simulate a Biconical antenna in cst, but I having problems. It should be feed usind a coaxial cable thrugh the cones. Does anyone have some kind of advice for this simulation or any model that have good agreement with measures? I have tried a subgrid-meshing to get enough mesh between the port and the metallic (...)
attched is a very simple patch antenna model in cst. Actually the model maybe incorrectly constructed because of at least three abnormal results. 1. the resonant frequency is not around 1GHz since the width is 30mm and the permitivity of the substrate is 25. 2. the rad.efficiency is only 5% and tot.efficiency is 0.002~~(i exported the simulation
cst is very ok for coaxial feed. however in your case its mesh problem. Increase the mesh and you will get the right result.
Hi, I have an antenna model (planar type - the antenna is placed on a dielectric substrate) in cst and I want to analyze its operation in free space without the effect of ground so my model doesn't contain ground. My problem is that if I use coaxial cable to excite this antenna, is it OK without ground. I've constructed the coaxial cable in (...)
Hi, I have build a model in cst MWS, and when solve it by transient time solver the s11 plot that i get not good that is the return loss is around 10dB only, so anybody can help by giving some suggestions on which dimension that i should modify so that i can get a return loss of around 30dB? The structure of the antenna is a bit different, it
hello kaandee, from s11 we can see that your antenna is not radiating. The normal way to feed an spiral antenna is to center feed by coaxial probe from bottom. The way you are feeding is unusual for spiral antennas. Have you simulated a paper or this you done by yourself? try to bottom feed in centre and (...)
hello everyone ... l'm doing a design for a planar array for a smart antenna ... l'm using cst program for my design and l need to do a comparison for the function of the antenna when a 2*2, 4*4, 8*8 and 10*10 elements of the planar array are used ... so, shall l use a coaxial port to feed each element or l should use the transmission (...)
which type of feeding u used in ur structure??? which type of material u used in antenna material? what r the properties of material used for antenna ? plz also mention the loss tangent in material define case??? if u used coaxial feed n outer conductoe used any dielectric material then u must mention the material loss after that i (...)
Hi Any one know, how to feed dipole antenna to get UHF TV. I have designed dipole antenna according to Balanis Antenna theory book. I have used 75 ohms coaxial where centre feed is connected to one arm and outer conductor is connected to other arm to make sure balanced. Is any body know how we can connect SMA connector to make balun (...)
Hi there, I have a quick query about how to combine results for an antenna that uses multiple ports, with a different phase excitation for each port. You see I've designed an open-ended waveguide antenna fed using balanced probes, which are excited with 1|0° and 1|180° signals, well in cst it's straighforward to excite each using a coaxial (...)
I have design a physical rectangular coaxial power divider ( 4 way) and wanna simulate in cst. At first, I draw mechanical 3D then import to cst. I'm using both waveguide port , lumped port but the results look not real (S21 ~ -108dB) - Must I have terminate other port by lump element when simulate S parameter? I the (...)
Hi Rio, From my brief experience with PIFAs I noticed your lack of a ground plane and your short isn't coupled with one. Also if your going to use a coaxial type feed probe I suggest modelling that too with the use of a wave port. That said, I have modified your design with my suggestions (Find attached) ; although some further tweaks might be nee
Examples -> MWS -> Integral Equation -> Helix -> Helix_I_Wire.cst Unfortunately, this is second-hand information. The example path was only mentioned in a meeting. 86415 - - - Updated - - - As I understand it, you put a port over the end of the coaxial input, exactly as in the tutorial examp
Hi, I need to simulate at cst preformence of reflector (dish)antenna (that have the dimension of d=12cm,f=8cm,freq=34.3GHz) and compare to the specsification of the real one reflector antenna I am using the the tamplate from :macros\constract\online\reflector dish but in this tamplate there isn't a feeding point (coaxial line port (...)
In cst, Zeland we have coaxial (waveguide port), but in NEC we have not. Is enough to excite just first segment (node) of wire from coaxial cable?
Hello! I'm trying to simulate a Biconical antenna in cst, but I having problems. It should be feed usind a coaxial cable thrugh the cones. Does anyone have some kind of advice for this simulation or any model that have good agreement with measures? Here is the model I have done, if someone wants to have a look, done in (...)
Hello. I've got a problem. I need to design a microstrip antenna for cicular polarization. I don't know what is more suitable circular polarization, I am thinking in a square patch, feed with coaxial, but the problem es How feeders? or I use single feed , What is the better? What is more easy? Note: I`m working (...)
we normally in cst MWS as well as in HFSS we use wire port to excite halfwave dipole in the centre. now i have constructed a dipole and have used coaxial cable as feed transmissin line as coaxial is unbalanced line and dipole is balanced so i have to design balun as well. now when i simulated this actual dipole along (...)
dear u should use coaxial probe feeding and not the microstrip feed.i have downloaded ur attachment it is not the way it is given in the paper. try to draw the same structure in a monopole configuration and fed it with a coaxial cable through the underside of the ground plane. u should take a smaller ground plane for ur (...)