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65 Threads found on edaboard.com: Fdtd Antennas
Conformal antennas require different solvers than full planar structures. There are quite a few solvers commercially available: CST, WIPL-D and HFSS are well known. If you look around on the web using google you can even find open source fdtd and FEM codes for solvers and meshers. It is also possible to calculate/simulate a large number of structur
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
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:
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)
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)
Anyone having these papers? thanks very much. Modification to convolution CFS-PML for the ADI-fdtd method, Feb 2006, Microwave and Optical Technology Letters Microwave and Optical Technology Letters Volume 48, Issue 2 , Pages 261 - 265 Modification to convolution CFS-PML for the ADI-fdtd method Linnian Wan
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
I think for large structures you need fdtd, for smaller ones MoM may be employed, for very small strucutres FEM can also be used
i need fdtd code to simulate dielectric resonator antennas, can any one herlp me? thanks in advance
please i need help to solve this problem i need to simulat an optical fiber one dimension in fdtd but with i take the materieal to be dispersive and nonlinear and i need to get the electric field at very large distance like 100 km but in simulation i can not simulat this large domain so i need to make some scaling to the material to get the same
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:
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 program
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. (...)
i want to choose a general-purpose fdtd method, which is fast, accurate and easy for implementation. I read some documents about normal fdtd, Cfdtd and ADI-fdtd, but still cannot tell which one is better, somebody say Cfdtd is not easy in meshing, others say ADI-fdtd may not stable, etc, (...)
have a look at # K. Abdijalilov and J. B. Schneider, ``Analytic Field Propagation TFSF Boundary for fdtd Problems Involving Planar Interfaces: Lossy Material, Evanescent Fields,'' IEEE antennas and Wireless Propagat. Lett. vol. 5, pp. 454--458, 2006. (1.4 MB PDF file.) from
til now idon't understand about MoM n fdtd what is the diffrent? for designing antenna Microstrip i have been using MWO. my friend said MWO is using MoM n HFSS is using fdtd is it true.....n for running simulation of MWO its need long time, especially for high frequency how about HFSS its need long time too for running simukation....thx b 4
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
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, Download links for the e book EM Modeling of antennas and RF Components for Wireless Communication Systems is given below: OR Taflove's fdtd book (Second Edition) is available at http:/
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
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
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... Regards Debashis
I have one thesis about simulate small antenna for uwb.Which way is better between MOM,FEM and fdtd? Could you please explain the cons and pros of the MOM,FEM and fdtd? Also please explain how to do MOM,FEM and fdtd in term of mathamatic? These problems have been asked before but I want to collect all the probs together as it's (...)
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
Hi eveyone.. can anyone explain ...... the " all possible types of source implementations in fdtd "... like ... Point source.. Dipole source.. anything related to source implementation will help me.. thanks in advance..
I am working with fdtd. I want to simulate radiation of microstrip antennas ( Sullivan book). Can you show me the way to implement it?
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
Check the following paper This paper appears in: antennas and Propagation, IEEE Transactions on Issue Date : Aug 1997 Volume : 45 , Issue:8 On page(s): 1294 - 1301 ISSN : 0018-926X References Cited: 21 INSPEC Accession Number: 5674616 Digital Object Identifier : 10.1109/8.611250 Date of Current Version : 06 August 2002 Sponsored by : I
Assuming that your antenna is planar, then Designer PlanarEM solver should work just fine, and shouldn't run out of memory. If the antenna is electrically large (many wavelengths at highest analysis frequency) and there is a lot of metal to be discretized, then the Method of Moments simulators might need much me
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
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
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 have some paper from EuMC 2003. Can anyone send me following papers for me W. Thiel, K. Sabet and L.P.B. Kateti, " A Hybrid MoM/fdtd Approach for an Efficient Modelling of Complex Antenna on Mobile Platforms" H. Oraizi, S. Hosseinzadeh, " The effect of Atmospheric Duct on the Modern OFDM-Based Digital Broadcasting Systems" C. Plapous ,J.
First of all, hello everybody, this is my first post. This site is great! 8O :), welcome to wonderland buddy ;) Well, I have a problem simulating microstrip ppatch antennas using Ansoft HFSS 9.1. I simulated with HFSS three antennas (all simulated with other software and measured) and the S11 return
fdtd method is also good to simulate pifa
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 (...)
RFSimulator, I must admit that MWS gained some market share because it released earlier a slicker UI, but since HFSS v9 I believe MWS is inferior. Itai The basic difference: fdtd (of Xfdtd or FIT of MWS) is better than FEM (of HFSS) and MoM (of SuperNec) in handling electrically large problem. FEM (of HFSS
hi hassan,u missunderstand me ,i ask about book interest in mom and fdtd of microstrip and new antennas analysis
hi all,i see that topic is repeated so much here,who trust with his simulator,i see some papers simulate with cst but not agree with measured,but most of fdtd siumlators has very approximately results agree with measured but fdtd is very slow compare with cst why?.i trust by cst but results simulation not accurate as measured . regards
hi, I think I have a good link for you: It is a fdtd code and ist is free :-) best: ricy
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
Hi, Venkat: From what I see, fdtd should not have problem in modeling interconnects in micrometer range. Uniform based fdtd algorithm may have difficulty in handling structures with large dimensions and small dimensions in the same structure. If all the dimensions are in the micrometer range, I believe that it should not have problems for such stru
my friends, search about MOM code or fdtd (matlab,fortan) about calculation phase response of printed (dipole sizeor patch size) versus frequency? any help pls
How to calculate S11 of a patchantenna mounted on a PEC cylinder using D-fdtd? I have read some papers about D-fdtd method,and it seems that the method could deal with a PEC object but it couldn't deal with a curved piece, is that right? I have read the Yu's paper, but in these paper, no particular attention has been paid and no formula is
A time-domain technique is probably best for broad band results, especially when there are a only a few (maybe just one) ports, as is likely the case with your antenna. Time domain techniques solve for the impulse response and then transform the impulse response into the frequency domain yielding broad band S-parameters. I don't know if there are
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
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. (...)
A 3-D dedicated design and modeling tool for antennas and antenna systems. It's based on fdtd. Has someone tasted it? the link: