EM Spectrum Lab offers a variety of videos on how to design and simulate electromagnetic components like antenna, microwave passive and active devices, and optical structures using different simulators. Videos are organized by topics into playlists.
Sir i have designed an pyramidal horn antenna in ANSYS HFSS for frequency range of 12.4-18.2Ghz, i have assigned it wave port and boundaries (perfect E to all faces of horn exept the face of wave port and radiation to radiation box) and gave it driven solution setup and frequency sweep. But sir when i try to validate it, it gives me an error "A wave port must have 'solve inside' objects on one side only. An internal wave port requires a PEC object to be attached to and cover the opposite side before the solution can proceed." Please help me sir I'm trying to solve it for more than 10 days
I found your videos very helpful, thank you so much for your efforts, I really appreciate it. But I am facing so many problems in simulation so, may I know where you learned simulation in ansys hfss.
Hi Sir, thanks for this wonderful video👍. I'm working on periodic dielectric gratings and followed all the steps from the video. However, I can't find the correct modes using mode analysis (I know the expected mode profiles). When I added an eigenfrequency step, it successfully found the modes. It seems like the solutions from the two methods don't match. Could this be due to using the wrong periodic condition (I'm using continuity condition)? Do you have any suggestions?
Thanks for your comment. I really cannot comment about your issue. But some problems originate from wrong boundary conditions. In your case, I think continuity BC is correct, but if you had the excitation in oblique incident you should use the Floquet BC.
@@EMSpectrumLab Sir, there is a question. Like considering your example and notations port 4 is 180 degree out of phase wrt port 1 right? So in s4,1 at operating the phase in CST should close to 180 degree right?
@@t012_amoghjoshi7 No, this coupler has different scenarios. If the port 1 is input, port 2 & port 3 are in-phase and the power splits equally through these ports. In this case the phase of S21 & S31 should be equal in the design frequency. In my design, this concept is verified in 10.26 GHz. For more information you can read the textbook: Microwave Engineering - David Pozar - 4th Edition - Section 7.8.
This would be nice for the effects of a negative refractive index meta materials that absorbs an infrared beam. A meta material like a catalyst Bismuth ferrite. The refracted field will have a water splitting ultraviolet field, for producing a liquid-phase non equilibrium plasma.
@@EMSpectrumLab this is an oversimplified version of splitting of water. I have presented it to AI Co-Pilot was told to write a scientific paper and submit it to a University. I worked in an analytical Laboratory for 25 years and realized how daunting that would be. If you like, I can give you a paper, though less detailed, on it. I am 76 yo and not good health, but I will do my best to make it logical.
please give a video on the design of rectangular patch antenna by the micro_ribbon(feed line) at 2.45GHz frequency (you have to see the reflection coefficient S11 the peak in the frequency 2.45GHZ) with the calculation of the precise dimensions of the patch antenna and how to use the wave guide port in the design of the patch antenna and how to make the ground and the patch by the copper in the HFSS software you want to help me because I find difficulties and thank you for moving forward
Kazakhstan Hello. Need help developing an invention using new optical fiber “hollow core photonic-substituted vacuum zone or (NANF)” . You can earn a lot of money. The Mickelson-Morley experiment, let's turn it into a school device so that it can be used on a bus or an airplane - this is how Einstein dreamed of testing his theories 100% With the help of the “HYBRID gyroscope” you can make scientific discoveries; in astronomy, astrophysics, cosmology, higher theoretical physics,... I am writing to you with a proposal for the joint invention of a HYBRID gyroscope from non-circular, TWO coils with a new type of optical fiber with a “hollow core photonic-substituted vacuum zone or (NANF)” where - the light travels 48000 meters in each arm, while it does not exceed the parameters 40/40/40 cm, and the weight is 4 kg. Manufacturers of “Fiber Optic Gyroscopes” can produce HYBRID gyroscopes for educational and practical use in schools and higher education institutions. Einstein dreamed of measuring the speed of a train, an airplane - through the Michelson-Morley experiment of 1881/2024, and only then would the experiment be more than 70% complete. This can be done using a fiber optic HYBRID gyroscope. Based on the completion of more than 70% of Michelson's experiment, the following postulates can be proven: Light is an ordered vibration of gravitational quanta, and dominant gravitational fields adjust the speed of light in a vacuum. (We are not looking for ether, we will see the work of gravitational quanta) The result is a «theory of everything» in a simple teaching device and a new tape measure for measuring the universe.
Hello, I'm wondering to know if there is any way to calculate the transmitted electric field, which I guess that maybe it would be easier in time domain. I'm trying to calculate the transmission of certain pillar array structure with CST Studio. I have succeeded with COMSOL but I'm able to reproduce the same results, my guess is that the boundary conditions in CST are wrong. I hope you can help me with this.
To calculate transmitted wave you should set Zmin as "Open (add space)" boundary condition. Other boundary condition are the same as what I shown in the video.
Yes, I will work on it. If you have any reference such as a research paper (with clear data) I would be grateful to share it with me. emwaves.eng@gmail.com
Hello sir，your are doing very well，but I cannot draw colormap after completing the parameter scan. The software reports an error. How to solve this problem?
The maximum value of passband is -0.5dB, so in order to determine cutoff frequencies, you should consider 3dB below the maximum value which means -3.5dB.
@@EMSpectrumLab Sir, I tried to do the simulation under CST The response wasn't good unlike HFSS, but for the ports I didn't create sheets, I assigned the PORTS to the higher transverse faces of Z0_1 and Z0_2. Do you think that the problem is because of that? Another question is the adaptation between Z0_1 and Z1_1 is verified even if the width of both Tx_lines is different w=1.009mm and w1=0.854mm. what is the theoretical formula to calculate s1,s2....,sn?
@@aminaaghanim4336 No, I think it can not be related to the size of transvers faces, but you can obtain their optimum sizes via CST built-in macro app. I do not have theoretical formula of "S_n" parameters, you can find them in the literature.
But the tangential E field is only zero for the dielectric - conductor interface right...so that is only happening for the ground plane...in all other directions how can we set Et = 0 boundary condition?
Hello sir, ur video it’s very helping me out. but i wanna ask u, can this tutorial be implemented for an anechoic chamber at s-band frequencies ? i’m very interesting for learning this CST, thank u sir 👏🏻
Very Informative Video. Really thanks for that. I wanted to know some details about this design Method. 1. Did you use TRL calibration method to extract S parameters? 2. Can you please explain how you calculate Xs and Xp(you explained in the comment below but I couldn't understand)? It would be really great if you could answer my questions. Thanks a lot.
Thanks for your comment. I did not use TRL calibration method, I just extract S-parameters using simulation. To calculate Xs, Xp and Phi parameters you should calculate S-parameters of an iris in a waveguide using EM simulator like COMSOL or HFSS (in HFSS you should draw 3D waveguide instead of 2D waveguide in COMSOL) and then using the explained equations in the video obtain the Xs, Xp and Phi parameters. You should sweep these calculations for different values of W parameter (iris width), so you have a matrix value of Xs, Xp and Phi parameters and therefore K parameter. Then, compare the value of the obtained K parameter matrix from simulation with the single value of K parameter from theoretical calculation. So you can find the correct value of W parameter.
@@EMSpectrumLab Thanks a lot for your reply. How did you extract S-parameter using simulation? I have emailed you regarding the same. It would be really great if you could explain it. Thanks
