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Recent content by mina.nms

  1. M

    vhdl code for dividing two number

    hi would you plz help me? what is the problem with this vhdl code for dividing two numbers by state machine? Thanks library IEEE; use IEEE.STD_LOGIC_1164.ALL; use IEEE.numeric_STD.ALL; entity divi is Port ( a,b : in STD_LOGIC_VECTOR (15 downto 0); clk,e_in,res : in...
  2. M

    Adding BST ferroelectric to HFSS

    for making a material(linear material) in HFSS Is it enough to import its permittivity and loss tangent only? are the other information important for situation of resonant frequency in S21 curve or not? Thanks
  3. M

    Adding BST ferroelectric to HFSS

    Thanks but in library of HFSS there is a ferrit material as a default I think the problem of nonlinear magnetic material in HFSS is for ferromagnetics not ferroelectrics Is it correct?
  4. M

    Adding BST ferroelectric to HFSS

    Hi I need to add the barium strontium titanate(BST)thin film to HFSS, how should I do?
  5. M

    relation between permittivity and conductivity

    is there any formula for a temperature room and low frequency that it does not depend on frequency?
  6. M

    relation between permittivity and conductivity

    Hi everybody what is relation between relative permittivity and conductivity of a dielectric? I want to know the conductivity of dielectric that its permittivity is 3.85 and tangent loss=0.01 I dont know what material it is? I have found a formula that tangent loss=conductivity/(w*real part of...
  7. M

    [SOLVED] error in HFSS"Unable to create child process"

    thanks i reinstalled the HFSS and the problem has been solved.
  8. M

    [SOLVED] error in HFSS"Unable to create child process"

    it gives the error for all programms
  9. M

    [SOLVED] error in HFSS"Unable to create child process"

    hello every body when i run programm in HFSS it gives me error: "*Global - Messages [warning] Left-alt + shift is currently used by the system to toggle the input language. It is also used in some portions of this application, which may cause the input language to change unexpectedly...
  10. M

    help in subs command in matlab

    hello i use subs command in my matlab programm: i want to get F in numerical mode,F obtained from integral of f1/f2 in x variable F=int(f1/f2,x); I defined all the parameters like f1 and f2 in matlab program but when i use subs command for getting F in numerical mode : F=subs(F) it gives me...
  11. M

    formulas of wave propagation in a dielectric slab

    thanks ckshivaram & MRAMA but i have a problem yet could any one please tell me the below codes of wave propagation refer to wich formula? CNA = 1.0 - SIG*DT/(2.*E0*ER) CD = 1.0 + SIG*DT/(2.*E0*ER) CA = CNA/CD CNB = DT/(E0*ER*DZ) CB = CNB/CD; Ex(1,I) = CA*Ex(1,I) - CB*(Hy(1,I+1) - Hy(1,I)) thanks
  12. M

    formulas of wave propagation in a dielectric slab

    thanks all but i have a problem yet could any one please tell me the below codes of wave propagation refer to wich formula? CNA = 1.0 - SIG*DT/(2.*E0*ER) CD = 1.0 + SIG*DT/(2.*E0*ER) CA = CNA/CD CNB = DT/(E0*ER*DZ) CB = CNB/CD; Ex(1,I) = CA*Ex(1,I) -...
  13. M

    formulas of wave propagation in a dielectric slab

    hello i need formulas of wave propagation in a dielectric slab thanks
  14. M

    Angular frequency of silver

    thanks yes for angular fereq its right,cycle in a second but what does it meaning for Damping coefficient?
  15. M

    Angular frequency of silver

    Damping coefficient of silver hello i read in a paper the Damping coefficient of silver is about 8.5e13 S^-1 what does its unit( S^-1) meaning? thanks
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