Effect of open stub and short stub of Band pass filter performance??

Dear All! I have seen several papers on design of microstrip band pass filter using open/short stub...I am not quite clear about where to use open stub and where to use short stub or what is the...

09 October 2019 7,410 3 View

How to calculate dimension of stubs of stub loaded resonator BPF to work in UWB band?

Hello!! I have seen several papers using various techniques (e.g., SLR, SIR) to design BPF for UWB band applicaton..I wish to ask how the dimensions of filter are decided/choosen so that it...

08 September 2019 3,781 4 View

Why fractal filters(BPF) usually have better selectivity (roll off rate)??

Dear Researchers, I have studied several papers on design of band pass filter (BPF) using fractal structures say Koch Fractal, Minkowski Fractal etc. They all usually have good rolloff rate. What...

03 April 2019 9,186 2 View

Why cutting a slot on SIW structure produce band pass response?

Hello!!! Simple SIW (Substrate Integrated waveguide) structure is a rectangular guide created within a substrate by adding a top metal over the ground plane and caging the structure with rows...

03 April 2019 4,649 1 View

In Multi Mode Resonator(MMR) band pass filter (BPF) using open stubs, why position of Transmission Zeros (TZs) is dependent on stub length??

Dear Researchers, I have designed a SIW MMR filter using comb slot (acting as open stub). In the mode chart, the position of TZ (transmission zero) esp at upper stop band is changing with the...

02 March 2019 7,146 4 View

Extract Permittivity and Permeability using NRW Method?

Dear Reserachers, How to Extract Permittivity and Permeability using NRW Method for a metamaterialin HFSS software. Anyone who know, kindly guide the steps.. Thanks Nitin

10 November 2018 3,946 5 View

Rule of Plagiarism in reputed Journals (IEEE/Wiley/Elsevier/Springer)??

Dear Researchers, Can someone kindly guide about rules of plagiarism in these reputed journals? Is it counted for consecutive four(4) words or more..As per new UGC rules (in India) 14...

08 September 2018 3,211 4 View

Regarding review time of few journals in Electromagnetics?

Regarding review time of few journals in Electromagnetics I need to know average review time of following journals:1. journal of electromagnetic waves and applications (Taylor francis)2. IETE...

07 August 2018 5,900 3 View

How to calculate roll off rate of a band pass filter?

dear Reserachers, pls guide how to find value of roll off rate at both edges of Band pass filter in term of dB/GHz. i have attached a graph of someone's paper.kindly guide how he has found value...

07 August 2018 9,227 1 View

How to calculate roll off rate of a band pass filter?

Please find attached paper.In second last page, author have given formula of roll off rate. Can anyone guide howto read 40db and 3 db attenuation point in S(S Vs f) parameter graph as given in...

31 December 2017 2,892 2 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

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 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