Antennas and metamaterials
时间：04-10
整理：3721RD
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hi,
I am working on antennas with metamaterials using FDTD method.
So to simulate metamaterials with FDTD i need fristly to calculate the permittivity and the permeabilty using retrieval method. so I have used the smith article namely '' Electromagnetic parameters retieval from inhomogeneous metamaterials'' published in March 2005. However, I have found a problem to calculate refraction index n using the equation given below because the b is a complex number, so how i can calculate acos with a complex number?
n=(1/kd)*acos(b)
with b= (1/2*S21)*(1-S11*S11+S21*S21)
I am working on antennas with metamaterials using FDTD method.
So to simulate metamaterials with FDTD i need fristly to calculate the permittivity and the permeabilty using retrieval method. so I have used the smith article namely '' Electromagnetic parameters retieval from inhomogeneous metamaterials'' published in March 2005. However, I have found a problem to calculate refraction index n using the equation given below because the b is a complex number, so how i can calculate acos with a complex number?
n=(1/kd)*acos(b)
with b= (1/2*S21)*(1-S11*S11+S21*S21)
whats is b?....how becomes complex?
hi,
b depends of S11 and S21 and you know that S11 and S21 are complex variables.