Why permittivity of a material decreases with an increase in frequency of the voltage source?

I am lottle bit confused about that how permittivity of a material decreases with an increase in frequency of the voltage source? Kindly, explain this concept with some example or mathematical. Thanks

03 April 2019 8,107 6 View

White Gaussian Noise PSD is fixed No/2. So how we can investigate that noise variance is average power of the noise?

Prove the above statement in suitable way. Thanks

02 March 2018 6,646 0 View

How we can improve power factor, when load connected with induction motor?

As we know initially PF in case of induction motor is lower, but after some time PF becomes improve. Can any one explains that how we can improve the PF instead by using the parallel capacitor bank?

02 March 2018 7,741 5 View

I want to simulate OFDM in matlab by using the BPSK technique. can any one helpout?

Total bits which I want to transmit are 128. It means channel length is 128. cyclic period bits are 8.

11 December 2017 585 0 View

How we find frequency response of the signal?

can any on help me that how can i find the frequency response of the given signal? The required signal image is given below.

09 October 2017 8,560 2 View

Can any one prove this question ?

Prove this linear algebra question which belong to matrix operations

08 September 2017 1,488 0 View

Can any one provide me Wind Turbine Free CAD design files?

07 August 2017 9,431 6 View

Can Any one tell me the correct answer with solution or tech about attached picture question?

07 August 2017 5,706 3 View

Kindly, tell me that how can find out the switching angles for 7 level H bridge inverter by using half hight method?

02 March 2017 5,096 1 View

By using Half Height method, I have calculated the main switching angle. How can calculate other switching angles by using these main angles.

the code for main switching angles are attach below.

02 March 2017 4,692 0 View

Physics: Why do we describe light by referring to its wavelength, but microwaves and radar pulses by referring to their frequency?

In physics, the description of the properties of light generally refers to its wavelength (nm), while in the range of microwaves and radio waves we refer to the frequency of a signal (e.g. kHz or...

03 March 2021 1,682 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

Genome-wide gene identification protocol ?

Is there any book chapter/book, webpage or research article available to understand genome-wide gene identification?

28 February 2021 8,095 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

How to improve and implement WBAN MAC and Radio modules under Castalia 3.2 ?

Hello researchers, Hello Castalia3.2 researchers I am a beginner with Castalia, I work on optimization of RFID systems used in wireless body networks. I simulated a WBAN with 10 nodes and one...

28 February 2021 400 1 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

I want to performe MALDI-TOF MS for bacterial identification, I would appreciate it if anyone can tell me the matrix solution preparation protocol ?

based on what I've studied on multiple papers, for peptide and protein identification Alpha-cyano-4-hydroxycinnamic acid (CHCA) is an appropriate matrix to use, I also know that the CHCA powder...

26 February 2021 6,799 3 View

Gas sensor response and recovery time independant of flow rate and chamber volume?

I am trying to obtain the response and recovery times for my gas sensor device. It appears the the response/recovery times are primarily dependant on the flow rate of the gas I inject into the...

26 February 2021 1,511 3 View

Can anyone help with Schistosoma identification?

Can anyone identify what kind of Schistosome species this might be? Morphological features of cercariae and adults resemble Trichobilharzia, though I am fairly new to the field of parasitology...

25 February 2021 7,760 6 View

I have need of XRD graph analysis software for phase identification. Can you please provide links for software tools which can be downloaded?

i am trying to download x'pert high score software, but can't download it. please do suggest software for phase analysis

24 February 2021 5,687 4 View