Antenna efficiency in HFSS

More Shadi Ebrahimi's questions See All

I'm looking for ways of analysing discoure complition tasks and ways of devising them, any suggestions?

I am an MA student working on pragmatics, specifically DCTs (discourse completion tasks). do you happen to know any books or articles on how to write and analyze DCTs? or is there any source for...

28 July 2020 5,136 2 View

Best novel method to optimize 3D geometry and its fluid?

Do you have any idea what is the best method to optimize 3D geometry and its fluid without linking the code with fluent (or any flow solver) ? In order to find the best 3d geometry and decrease...

10 April 2020 9,321 1 View

Do you know any solvents to remove insects from the sticky traps?

We have been using thinner to remove the insect specimens from sticky traps. However, we would like to use other solvents with no toxic effects.

15 March 2020 6,789 12 View

Does anybody have an Android ".csv" Malware Data-set?

17 December 2019 761 3 View

I have problem with cytotoxicity test of gemcitabine.how can i fix it?

Hi, i am working on effects of gemcitabine in HepG2 cell line and i should use the IC50 of Gemcitabine in the experiments.i found different values in literature and the numbers are highly variable...

06 December 2019 6,382 3 View

What is the IC50 of Gemcitabine in HepG2 cell line?

Hi, i am working on effects of gemcitabine in HepG2 cell line and i should use the IC50 of Gemcitabine in the experiments.i found different values in literature and the numbers are highly variable...

26 August 2019 8,545 4 View

I run GSSHA model in WMS software but the result was not reasonable what is the problem?

i do it with 32 mm precipitation

05 August 2019 8,187 2 View

In flow analysis in FLAC software, what is the reason for moving the model after the flow analysis in the earth dam?

Hello I have a model of earth dam in FLAC 2D and I did an uncoupled analysis for mechanical and flow. (set mech off/flow on ) Next step, when mech on/flow off ,the model starts to move in the...

14 July 2019 5,146 3 View

Do any researcher have ideas for the best medical Phantom that could be employed in segmating 3D medical data?

I am doing a research for segmenting 3D medical volumes using different techniques I used recently NEMA IEC body phantom and CIRS abdominal phantom,model 057 in my research I am looking for the...

19 May 2019 9,979 2 View

Hi, i want to work in targeted cpp-mediated delivery of pDNA. but i do not know if DNA can stably reach to nucleus?

i want to design a cell penetration peptide for delivery of pDNA. that this platform targeted with a tumor targeting peptid

24 April 2019 6,763 2 View

error in running a model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

error in modelling model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

MGL tools

20 June 2021 0 0 View

what is the simplest definition of ion exchange capacity

What this unit identifies for the ion exchange capacity ca. 0.92 meq. g-1. I am a newcomer in the membrane area. I just started. I highly appreciate your help

08 May 2021 0 0 View

what is the simplest definition of ion exchange capacity

What this unit identifies for the ion exchange capacity ca. 0.92 meq. g-1. I am a newcomer in the membrane area. I just started. I highly appreciate your help

08 May 2021 0 0 View

i have some problem with chtMultiRegionSimpleFoam

--> FOAM FATAL ERROR: Maximum number of iterations exceeded From function Foam::scalar Foam::species::thermo::T(Foam::scalar, Foam::scalar, Foam::scalar, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar) const) const [with Thermo = Foam::hConstThermo >; Type = Foam::sensibleEnthalpy; Foam::scalar = double; Foam::species::thermo = Foam::species::thermo >, Foam::sensibleEnthalpy>] in file /home/ubuntu/OpenFOAM/OpenFOAM-4.1/src/thermophysicalModels/specie/lnInclude/thermoI.H at line 66. FOAM aborting #0 Foam::error::printStack(Foam::Ostream&) at ??:? #1 Foam::error::abort() at ??:? #2 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::calculate() at ??:? #3 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::correct() at ??:? #4 ? at ??:? #5 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6" #6 ? at ??:?

24 March 2021 0 0 View

Can we classify HV and LV lines based on line length?

I have dataset which shows the length of power lines. I need to classify the lines based on the line length. Is there a rule to classify the High voltage (HV) and low voltage (LV) lines based on...

03 March 2021 4,116 4 View

What is the production process of CaFe ferroalloys?

I looking for ferro calcium production process

03 March 2021 1,755 4 View

Resistor definition in Piezoelectric bimorph with ANSYS workbench

Hello, good day! I am trying to simulate similar bimorph piezoelectric harvester with below commands. However, the output power doesn't change with resistor value. Please help to find the reason. ET,10,CIRCU94,0 !SET UP RESISTOR R,1,100000 !RESISTANCE VALUE TYPE,10 !SET ELEMENT TYPE E,1,2 !CREATE RESISTOR BETWEEN NODES 1 AND 2 Thanks in advance Regards,

02 March 2021 0 0 View

Help request in CST microwave?

im working now on TPV solar cells and metamaterials and i realy need our help in CST microwave i have a tpv cell simulation and i want to extract particullarly the absorbtion of only the active...

02 March 2021 2,246 2 View

Anveshkumar Nella

No, you change the primary sweep as frequency. So, it results x-axis as frequency.

Make sure that solution is sweep but not last adaptive.........

Shadi Ebrahimi

Thanks! in "Results/create far fields report" I only have "last adaptive" in my "Solution" option; how would I add "sweep" to Solution option?

Sudipta Maity

Be careful in HFSS simulation. HFSS (and CST also) give 102% efficiency (or sometime 103%-105%) for DRA. Therefore, if you simulate microstrip antenna, you may get 95% efficiency but practically, you will get 78-80%. Therefore, simulate your design properly.

Narasimha Rao Kilaru

In Analysis--->Setup1--->right click and add frequency sweep. there you can give the sweep range and click save fields.

Then in solution you can change the "last Adaptive" to your sweep and get the results accordingly.

Thanks everyone! I could plot efficiency versus freq.

Now as you mentioned efficiency goes above 1 - or is very close to 1 at some frequencies. why does this happen? Indeed the main purpose of my sim is to figure out how much power is going to be radiated from the antenna under test. Do you know of any other method which the amount of radiated power could be examined? I know we can plot accepted/radiated power in Results/far field/recatngle/antenna parameter/ - what do you recommend?

Thanks for your help!

During my work, I faced that problem (efficiency > 100%). To overcome that problem, design your antenna structure as per the fabricated design i.e. include thickness of ground plane, use proper coaxial probe to excite the antenna, give at least 4-5 times larger (than max dim of antenna) ground plane, try to avoid hypothetical inputs (these are designed for simulation purpose only such as wave-port, lumped port etc) etc. After incorporating all those corrections, we got excellent results in HFSS. Experimentally, we got similar results. After performing several experiments for the same sample, we got the correct procedure for designing antenna geometry in HFSS (as given above).

HFSS (or other simulators) is a tool only. We have to use it properly in research. All the best for your work.

It is better to design at least one published geometry in HFSS (or CST) and verify those results. Then go for your work using similar design procedure.