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

Is it possible to have two luminescence bands of the same peak position but with different intensities in single spectrum??

Hi! If it is possible to have two luminescence bands of the same peak position in a spectrum, what is the reason behind formation of two separate bands instead of one? This phenomenon is related...

26 February 2021 4,963 5 View

How can I find a Raman spectrum wavenumber corresponding to what compound?

I have several Raman spectra with very distinct peaks at certain wavenumbers, such as 277, 359, 466, 583, 623, 686, and 795cm-1. How can I identify them to what compound(s)? The RRUFF and others...

24 February 2021 363 3 View

What are difference between laser diodes, simple light emitting diodes and power light emitting diodes when operated in the visible spectrum ?

I want to illuminate a scene (small space) using LED to capture photographs or videos of some tiny objects inside the space. But am not sure if I should use a Laser LED, or simple LED or power...

22 February 2021 4,240 4 View

What low-cut filter (high Pass frequency) to be used for response spectrum (Tripartite plots) ?

What low-cut filter (high Pass frequency) to be used for the response spectrum (Tripartite plots)? I am currently working on differentiating between hard/soft site responses in Indo-Gangetic...

21 February 2021 9,273 2 View

Interpretation of a fluorescence Emission spectrum ?

Hello, i work with a spectrometer which only render the fluorescence emission spectrum. Until now i just found how to interpret an exitation- and emission spectrum together to generate deeper...

20 February 2021 1,291 3 View

If the electron is a wave, then what is its nature? Is it an electromagnetic wave?

If the electron is a wave, then what is its nature? Is it an electromagnetic wave? Thank you very much,

17 February 2021 9,024 4 View

How to detect uv vis spectrum of nanoparticle under 300nm?

I try to make the indium nanoparticle and check the uv vis spectrum. I heard that In nanoparticle has surface plasmon resonance peak at 200~300nm. But most of solvent has absorption peak under...

14 February 2021 6,950 15 View

DMAE (deanol bitartrate)- dimethylaminoethanol bitartrate?

Hello all... I m looking for a method for assay DMAE (deanol bitartrate)- dimethylaminoethanol bitartrate in aqueous samples (cosmetic product) using GC- MS mass spectrum HP- 5 ms U.I 0.25...

13 February 2021 7,629 3 View