Phased Array design specifications?

I need to design a phased array with freq. 2000 MHz to 2300 MHz specification. Thinking of linear array. Directivity should be high like 20 dBi and circular polarization. Can you please advise me...

01 February 2020 4,185 4 View

Wideband (2 to 6GHz) metamaterial enabled antenna?

I am designing metamaterial enabled antenna for wideband freq. I have antenna with wideband freq. bandwidth. Have a metamaterial at the back of antenna, but not able to get wideband when I put the...

07 August 2019 5,828 10 View

Reference impedance for stripline?

I am having difficulties in designing stripline on cst. The reference impedance should be 50 ohms and it should be straight line at 50 ohms. Please guide what mistake I am making. I played with...

07 August 2019 2,551 7 View

Can I have some suggestions on transmission line metamaterial antenna?

any paper links

05 June 2019 6,584 5 View

Metamaterial transmission line is same as metamaterial?

Is metamaterial same as metamaterial transmission line? Why do we need transmission line on metamaterial? Is this an antenna once we put transmission or stripline on metamaterial. Any guidance is...

05 June 2019 7,064 5 View

Looking for flexible high k polymer material?

I am in need of high k polymer material but it has to be flexible as my application is wearable.

11 December 2018 1,328 5 View

What is the Gain of Archimedean Spiral antenna?

Gain of 2 arm archimedean spiral antenna

01 February 2018 4,171 2 View

What is the impedance of Bow-Tie antenna? How we can match the impedance with coaxial feed? Please Suggest

What is the impedance of Bow-Tie antenna? How we can match the impedance with coaxial feed? Please Suggest

06 July 2017 5,875 2 View

Archimedean spiral antenna parameters help please?

How does it affect the impedance and radiation pattern of Archimedean Spiral antenna if the width of the turns are wider, if no. of turns gets increased or the spacing between the turns increased...

31 December 2016 1,576 6 View

What does tangential component of E (Electric) is zero mean?

I am working on Metamaterials and getting more information about it. Regarding that, I want to know what does it mean exactly that tangential component of E (Electric) is Zero. Please Help

31 December 2016 8,728 6 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

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

Could you recommend any books about Number Theory?

Beginner level books. High level books. Analytical Number Theory. Algebraic Number Theory. Combinatorical Number Theory. Books about partitions. Books about primes.

03 March 2021 7,174 5 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