Which simulation softwares can be used for designing a traveling wave tube?

Can anybody guide me towards a simulation software that can be used for designing traveling wave tubes? Any views about COMSOL multiphysics?

11 December 2017 9,946 2 View

How can I measure voltage at the port of an antenna in HFSS?

I have a plane wave incident on a horn antenna and would like to measure the voltage at the port of the antenna? How do I go about it? Waiting for some input.. Regards,

03 April 2017 5,897 9 View

What is optimum height and width of a rectangular port in HFSS?

Hello, I have a confusion with assigning a port in HFSS. What should be the height and width of the port for printed antennas, lets say a patch antenna or any other antenna. When I keep the width...

02 March 2017 4,223 4 View

How do I design phase shift array using circuit elements to control the pahse shifts?

I am interested in designing a beam steering planar array and would like to know a few techniques to introduce phase difference. I know a transmission line of different lengths could be used to...

05 June 2016 4,769 6 View

How can electromagnetic band gaps (EBG) be used efficiently for patch antennas?

04 May 2016 1,747 5 View

How do I set up free convection in comsol?

I want to see the effect of free convection on a patch of water enclosed inside a solid (Calcite) when it is heated by a dipole antenna. Currently, I am simulating the antenna in a separate study...

10 November 2015 5,777 2 View

How do I model conduction and convection in heat transfer in solids interface?

I am trying to model heat flow in a material using the Heat Transfer in Solids interface of COMSOL (5.1). I would like to include conduction and convection as well. Guidance needed for a new...

08 September 2015 1,340 5 View

How do I find 3dB bandwidth in COMSOL?

Hello, I have simulated an antenna in COMSOL. I got the radiation pattern and now I am interested in finding the 3dB beam width of the radiation pattern. Any suggestions? If it is not clear from...

08 September 2015 9,545 2 View

How to solve Convergence error due to singularity in COMSOL?

I am trying to model heat flow in a solid material. I am using periodic ON/OFF of the Electromagnetic source (Antenna), via a rectangular pulse. The pulse is ON for 12 hours and OFF for 12 hours,...

08 September 2015 9,636 0 View

How can we select boundaries, edges, domains in COMSOL?

I am new to COMSOL and I would like to know how to find out the number of boundaries, edges and domains? How does COMSOL assign the numbering. For example, if I want to assign a material to my...

07 August 2015 5,765 2 View

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10?

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10? Since, the growth curve from day 2 to 10 won't be like the "Logistic curve" it might not follow logistic...

03 March 2021 1,401 3 View

After a reference from Int J Body Compos Res, can any body help?

Hi, I am after the reference below, my library says it cannot obtain a copy either locally or internationally, any help appreciated! Chris Wang ZM, Heshka S, Wielopolski L, Pi-Sunyer FX, Pierson...

03 March 2021 6,193 1 View

What techniques can I use to determine the miscibility of polymer blends?

The term miscibility refers to the single-phase state in thermodynamics. I do not mean the compatibility of different components. To determine the miscibility I know several techniques such as...

03 March 2021 4,107 4 View

Is there any tutorial for comsol general projections?

Hi, im trying to make a projection in a 3d comsol model. I have a non uniforme chanel and my intention is to get the average tempreture in the y-z cross section and se the average tempreture...

02 March 2021 4,624 4 View

Is it possible to do piezoelectric coupling in ANSYS-APDL or COMSOL between tapered substrate and rectangular piezoelectric patch?

How to do Piezoelectric coupling in ANSYS-APDL or COMSOL between tapered substrate and rectangular piezoelectric patch? Piezoelectric coupling between the rectangular substrate and rectangular...

02 March 2021 9,833 3 View

How to repeat an operation on an atom selection for multiple times in PyMol?

Hi, I am trying to construct a multi-layer fibril structure from a single layer in PyMol by translating the layer along the fibril axis. For now, I am able to use the Translate command in PyMol...

02 March 2021 4,569 4 View

Shall I skip the measurement model in SmartPLS?

Hello everyone, I had run a mediation model in SmartPLS using questionnaires that were already validated among my statistical population. A professor who edited my paper -though she is not...

01 March 2021 3,052 3 View

What is involved in morphological changes of SEM images of a substance?

In the sem analysis of CaCO3 nanaoparticles, the morphology images showed spherical shaped particles but the proposed morphology for these type of nanoparticles is trigonal. I prepared the...

01 March 2021 1,960 4 View

Joint behaviour in Abaqus is not captured well?

I am working on roof joint and trying to simulate the behaviour in Abaqus. I am successful in running the model but the final graph does not follow the experimental curve in the negative direction...

01 March 2021 6,661 3 View

How to define tie constraint between rigid body and another part in dynamic explicit model of Abaqus?

Hi dear researchers I connected a rigid body into the part of my structure by tie constraint and then I added displacement to rigid body, in static general step every thing is fine and these two...

28 February 2021 3,442 2 View