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36 Threads found on edaboard.com: Fdtd Antennas
Does anyone work with fdtd using parallel processing in matlab? Do anyone have a sample code for 3d fdtd for antennas such as basic rectangular patch in matlab?
I'm looking for software to analyse both Yagi-Uda antennas, and the Coaxial Colinear (CoCo) type, which consists of sections of transmission line Build A 9dB, 70cm Collinear Antenna joined end-to-end, wit
I would also recommend some time domain code for the antenna array. Empire XCcell (based on fdtd) is a good choice for antennas. It is very fast (>2000 Mcells/s) without accelerator card, and has cluster capability for very big models. EMPIRE XCcel Antenna Examples EMPIRE XCcel
Dear all, I'm looking for actually limits attained from the modern fdtd implementations on cluster in terms of time elapsed and grid sizing. I'm interested in scattering problems of large structures as airplanes or ships with antennas installed. Does anybody know the latest results reached from universities or commercial code ? Regards, Va
according to my experience HFSS is better in speed than CST MWS when simulating planar structures. I agree. I use HFSS and I am getting pretty good results compared to measurements for planar antennas. I think CST/SEMCAD is better when your structure is electrically large since fdtd (CST,SEMCAD) does not require a
hi if any one working on leaky wave antenna .please help me with fdtd to design this type of antenna .provide me with some books and numerical technique Hello, i am doing about leaky wave antenna simulation using the fdtd method. Any body help me to give algorithm leaky wave antenna simulation using the fdtd method? Or any body have (...)
I am studying an article by Maloney. the article is A Simple fdtd Model for Transient Excitation of antennas by Transmission Lines. I'm kind of lost, because I need to implement this article in MATLAB. Someone would have something to recommend me? Or maybe some implementation done in MATLAB. Thanks
I had read the papper "Finete Difference Time Domain Calculations of Antenna Mutual Coupling".I want to do some research on the coupling among antennas.Although I have debuged it for such a long time, the results can't agree with your papper.I really can't find what's wrong. Do you have the code of that papper now? I will be very thankful
I am working with fdtd. I want to simulate radiation of microstrip antennas ( Sullivan book). Can you show me the way to implement it?
The short answer is: MOM is most efficient for wire and sheet antennas. FEM is best for moderately sized and volumetrically complex antennas. fdtd can handle the largest simulations and is best for broadband simulations. -Tip
hi for all please any persone help me: i have problem, when i read the paper R. J. Luebbers, Fellow, IEEE, and H. S. Langdon ?A Simple Feed Model that Reduces Time Steps Needed for fdtd Antenna and Microstrip Calculations? IEEE TRAKSACTIONS ON antennas AND PROPAGATION, VOL. 44, NO. I, JULY 1996. and programed by matlab ,i have the sam
check forums with this topic fdtd. you can find some source codes that simulate dipole anntena in 1D , 2D and 3D you this page is one of them. you can find more pages
I am working in UWB microstrip antennas analysis using fdtd but facing problem in C code implementation. plz help me with some example codes... Regards Debashis
What about method of moments software? Despite the fact that less people use them than FEM or FIT/fdtd they are extremely efficient in antenna simulation and don't suffer from any radiation boundary/ PML related problems. By efficient, I mean very fast and employing small amount of memory. For instance, how much would it take to simulate accu
I am working in UWB microstrip antennas analysis using fdtd but facing problem in C code implementation. plz help me with some example codes..... Debashis
Hello, i have final assignment about design of phased array antenna. Any body have codes matlab for fdtd analysis of phased array antenna? I need your help. Thank you
the application relates specifically to electrically large problems, for instance modeling various types of antennas (but resonant types), such as wire or MPA's on vehicles. i have no practical experiencing solving any of these techniques, but am looking for a greater understanding as to why any solution technique would be better than another in
Hi, I'm simulating Dielectric Resonator antennas with an in house fdtd code. When the DRA has low permittivity, say around 20-30, few thousands time steps are enough to calculate the S11 parameter. When I use higher permittivities, the more time steps I use the more confused S11 plot I get; with confused I mean lots of resonances/minimums. It seems
Hi All, I'm facing a problem in determining a reference plane in IE3D. I want to compare the result shown in Fig. 2 of the following paper (IEEE TRANSACTIONS ON antennas AND PROPAGATION, VOL. 51, NO. 10, pp. 2936-2946, OCTOBER 2003 by Prof. Samii). The method used in the paper is fdtd. Thank you. Rgds,
A 3-D dedicated design and modeling tool for antennas and antenna systems. It's based on fdtd. Has someone tasted it? the link:
hi, I am working on antennas with metamaterials using fdtd method. So to simulate metamaterials with fdtd i need fristly to calculate the permittivity and the permeabilty using retrieval method. so I have used the smith article namely '' Electromagnetic parameters retieval from inhomogeneous metamaterials'' published in March 2005. (...)
hi, I am working on antennas with metamaterials using fdtd method. So to simulate metamaterials with fdtd i need fristly to calculate the permittivity and the permeabilty using retrieval method. so I have used the smith article namely '' Electromagnetic parameters retieval from inhomogeneous metamaterials'' published in March 2005. (...)
Hello, in another thread (UWB-antennas Simulation) I got informations about fdtd method for antennas simulation special for uwb antennas for study the parameters in "time domain". Many thanks for all replies. Now next quastions: Should I write for fdtd method program codes? If yes: in which (...)
Hi, I am glad to work with about UWB antennas by fdtd Method. So if you need help you can contact me on my email:
i need fdtd code to simulate dielectric resonator antennas, can any one herlp me? thanks in advance
You can try to find the following reference: Qian, Y. and T. Itoh, fdtd Analysis and Design of Microwave Circuits and antennas (Software and Applications), Realize Inc., Tokyo, 1999. Good Luck
I think for large structures you need fdtd, for smaller ones MoM may be employed, for very small strucutres FEM can also be used
Please, if any body can help me with ideas on how to go about Modelling and simulation of a Ground Penetrating radar antenna tranciever I will be very grateful.I am using fdtd method and I have a general idea of what is involved, but I need help in starting the project. For example, I need to know what type of antenna I am going to use, the reason
It looks like the book is the following: Qian, Y. and T. Itoh, fdtd Analysis and Design of Microwave Circuits and antennas (Software and Applications), Realize Inc.,Tokyo, 1999 Is that right? S. PS: There is a free fdtd software in java at the following link:
Hi Habib83, maybe this fdtd report/code may be of help to you. You may have to adapt fdtd equations to FIT. If you are asking if anyone has simulated UWB antenna by FIT method, CST Microwave studio uses this method and many people has used to to simulate UWB antennas. Cheers, Element7k
ref the famous paper: Numerical Modeling of Microstrip Circuits and antennas, D. M. Sheen, Cambridge, MA, Massachusetts Institute of Technology, 1991. (MTT 1991), The patch work 7.5GHz. In Sullivan's fdtd book,as a example for 3D type. Question: But in his book,the result is 6GHz,is it the result error?(in CH5)
ref the paper Numerical Modeling of Microstrip Circuits and antennas, D. M. Sheen, Cambridge, MA, Massachusetts Institute of Technology, 1991. The patch work 7.5GHz. But in Sullivan's fdtd book,as a example for 3D type.But in his book,the result is 6GHz,is it the result error?(in CH5)
hi, I think I have a good link for you: It is a fdtd code and ist is free :-) best: ricy
I think You can't simulate the large reflector antenna in EDA's like HFSS or MWS. fdtd and MoM needs too many memory and time to simulate so large structures. I work on large reflector antennas several years and I don't know any good EDA tool for this problem. As I remember, FEKO can simulate such antennas in GTD approximation, but this (...)
Hi fgc, it is not a program but a paper in pdf avail in IEEE explorer. 1992 - fdtd Calculation of Radiation Patterns, Impedance and Gain for a monopole Antenna on a conducting Box. Cheers, Element7k thanks you , I think I need this program,but I don't download.
enjoy special to riyad that he seem to be interested in fdtd,pls thanks dr.hassan sallabi for his help regards