SCI and ISI indexed journals?

What is the main difference between SCI- and ISI-indexed journals? JCR (stands for Journal Citation Reports) is also produced by Thomson Reuter, are they the same thing?

09 October 2017 3,614 11 View

The IELTS/TOEC test for postdoc position?

Dear all,I have a question about the postdoc positions, did I need to do the IELTS/TOEC test to apply?Thank you

05 June 2017 5,326 0 View

The negative group delay in microwave devices (antennas, filters,..)?

Dear all, It is normal to obtain negative values of group delay (especially that its unit is nanosecond)? What is the physical meaning of a negative group delay in UWB antennas or filters? Best...

31 December 2016 3,760 4 View

What is the difference between the criteria used to define the antenna's bandwidth?

Dear all, Please what is the difference between the criteria that define the antenna's bandwidth? What is the main reason behind choosing the -6dB over -10dB criteria? Thanks

11 December 2016 1,204 0 View

The meaning of Quadruple Diversity?

Is that means that we can combine four types of diveristy in a single antenna system? If so, can you provide me an article deals with a combination of three to four types of diversity in a single...

07 August 2016 7,123 2 View

Which numerical method is more suitable for modeling patch antennas?

08 September 2014 9,188 4 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

What are anisotropic electrical and optical properties of a semiconductor due to?

In some materials, properties such as band gap, thermal conductivity differ along different crystallographic axes. What are the basics?

01 March 2021 1,923 3 View

I have designed reflectarray element and feeding it though Horn Antenna on HFSS. After full wave simulation, I am not getting desired results?

I have designed reflectarray element to generate OAM beams at 5.8GHz and feeding it though Horn Antenna on HFSS. After full wave simulation, i am not getting desired results i.e Radiation pattern...

01 March 2021 9,701 5 View

Does the circuit modeling for planar monopole antennas using Foster canonical forms give good approximation?

Hi researchers, I am searching for some accurate way to do the circuit modeling of planar CPW-fed monopole antennas. I have gone through the literature where mostly circuit modeling is done using...

28 February 2021 7,016 1 View

Microstrip antenna design tutorial of HFSS 3D layout module ?

I have designed a 24 GHz rectangular antenna on HFSS 3D model and got desired results while desing the same antenna with same dimensions I am getting resonance frequency at 27 GHz I am...

28 February 2021 4,426 2 View

What is Flat Lens Antenna?

28 February 2021 5,433 3 View

Compact antenna for the frequency range 1 MHz-5 MHz?

Hello everybody! I have a problem with developing a compact antenna for the 1MHz-5MHz frequency range. Tell me what type of antenna can be used and what books and articles to read to perform this...

27 February 2021 7,710 4 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

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25 February 2021 5,713 1 View

Efficiency of Proximity Feed Patch Antenna ?

Greetings to all of You! I have searched some research papers for the designing of a proximity coupled patch antenna. Researchers are talking about the impedance bandwidth of the antenna but...

24 February 2021 7,662 3 View