What is Flat Lens Antenna?

28 February 2021 5,433 3 View

Can impedance of antenna be less than 50 ohms?

I am simulating helix antenna in hfss, right now, giving excitation with 50 ohms port. When I see the results of Z parameter (real). It shows lower than 50 ohms. Do not understand, if it can be...

27 February 2021 4,218 7 View

Helix antenna coupling problem?

Dealing with a helix antenna, made with flexible material and not rigid like using a PCB board or wire. At the beginning of the helix is too close to the ground plane, causing coupling. How can I...

21 February 2021 4,453 3 View

Design parameters of L1 frequency Helix antenna?

Could I please get the guidance on Helix antenna operated from 1.5 - 1.8 GHz. I am designing in hfss and not able to cover 1.5 GHz. Could I get papers or suggestions on numbers I use to cover this...

02 February 2021 622 7 View

Should I make 2 helical antennas? One for 2.4 GHz and another for 5.8 GHz?

Should I make 2 antennas, one for 2.4 GHz and one for 5.8 GHz? How should I approach the problem if I want to design the antennas which cover 400 and 900 MHz and 2.4 and 5.8 GHz? All together in...

26 January 2021 906 3 View

VSWR is shooting to 2.1 or even 2.3 in UHF dipole antenna, why?

So, I have a design, two dipoles working at UHF and VHF. We fed using a diplexer. I am having difficulties with the testing using network analyzer. VHF passes but UHF, specially at 400 MHZ, the...

26 January 2021 8,743 8 View

Can I simulate Ferrite in HFSS?

I have a design with 2 dipoles working at different frequencies joined in one system and separated by Ferrite. I think, Ferrite was used to minimize the interference between 2 antennas as much as...

25 January 2021 5,918 3 View

How to dissolve L-tryptophan in PBS?

The solubility of L-tryptophan is 11.4g/l in water. I tried dissolving 1.14 g in 100 ml PBS but still, it's not fully dissolved. Should I add NaOH or HCl? Also, can we stir the solution, or...

22 January 2021 1,127 3 View

Testing of Antennas?

So, I came across, where antennas are being tested in a building ( a plant), where all sorts of big equipment are around and of course the ceiling. lot of multipath which can affect the...

21 January 2021 9,437 3 View

Why do we vary the spacing between helical coils?

Helical antenna usually have fixed spacing between the coils. What is the advantage of varying the spacing between the helical antennas? Varying the pitch angle. Thank you for your guidance in...

21 January 2021 8,864 4 View

How to arrange coordinates and extract climate dataset out of MPI-ESM-MR netcdf files?

Have a nice day everyone, I'm stuck in extracting datasets out of MPI-ESM-MR netcdf files because the latitude ranges from -3*10^6 to 3*10^6 and longitude ranges -5,9*10^6 to 5,9*10^6. Plus, the...

28 February 2021 912 3 View

How can i use excel format data on GrADs?

The data i have is on excel and I would like to create images based on it on GrADS plaese.

13 July 2020 4,926 1 View

How to use WRF output data as input data to WRF for initiating new simulation for higher resolution domain?

I want to run WRF-Real at higher resolution (100 m). For that I have to downscale WRF output data (1 Km).

13 July 2020 1,948 2 View

WRF Chem model?

I would like to find out how can I install and run WRF-Chem. I am already able to design and run WRF experiments on my own. Any documentation videos on WRF Chem other than those in Google?

18 May 2020 5,774 2 View

Is it possible to convert WRF output data (netcdf) to grib?

I'd like to use WRF output data to force a land surface model (HRLDAS). HRLDAS requires grib2 forcing data and I have so far been unable to convert from netcdf to grib. There are a number of tools...

17 March 2020 8,962 6 View

How to convert WRF output to any readable (text, excel etc) file?

For graphical display of WRF output data, there is NCL script, but i have not found any working script for converting data to text or other readable format. there are some softwares but they are...

12 February 2020 5,085 3 View

How to read GrADS binary format using R or python?

Is there any idea to read GrADS binary file? or alternatively convert GrADS binary file to other formats such as netCDF or general raster using R or python?

26 January 2020 2,456 2 View

SST data format for WRF?

Dear all, I intend to use SST data for my WRF runs, but data are in binary format and I need to convert them to GRIB2 format. I appreciate if somebody with same experience help me solve the...

19 January 2020 9,829 3 View

How do I resolve the following error I get during the execution of WRF gen_be for creating background error covariance file?

I am trying to generate the be.dat file using the gen_be facility of WRF. I have 12 hour and 24 hour outputs from WRF at 00 UTC and 12 UTC for a month. When I try to run gen_be_wrapper.ksh on my...

15 January 2020 244 2 View

SST data format for WRF?

Dear all, I intend to use SST data for my WRF runs, but data are in binary format and I need to convert them to GRIB2 format. I appreciate if somebody with same experience help me solve the...

31 December 2019 10,019 2 View