Dear Meep users,
I am trying to simulate the magnetic field created by a coplanar waveguide
(CPW): 3 parallels (gold ) wires (Conductivity sigma=41MS/m), at the
frequency 6.8 GHz (injected currents: -3,6,-3 A, characteristic dimension
a=1µm).
Please find the 'ctl' file for more details. Unfortunately, the simulated
field amplitude is lower than the expected value ( about 1/3).
I also noticed that I increasing or decreasing the conductivity, change the
amplitude dramatically (by several order of magnitude), which is also
unexpected.
Have you noticed this kind of behavior before ? (It's may be related to the
skin depth but the resolution doesn't change the results ).
I will be grateful if you can give me an explanation.
Thanks in advance for your time and your responses.
Mahdi AMMAR
PhD Student
UPMC, Paris
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(set! geometry-lattice (make lattice (size 40 40 no-size )))
(set! geometry
(list
(make block (center 0 0) (size 6 1 infinity)
(material (make dielectric (epsilon 1) (D-conductivity
(* 15442.56 1) )))) ; Au wire
(make block (center 9 0) (size 6 1 infinity)
(material (make dielectric (epsilon 1) (D-conductivity
(* 15442.56 1) )))) ; Au wire
(make block (center -9 0) (size 6 1 infinity)
(material (make dielectric (epsilon 1) (D-conductivity
(* 15442.56 1) )))) ; Au wire
)
)
(set! sources (list
(make source
(src (make continuous-src (frequency (/ 2.267 100000) )))
(component Ez)
(center 0 0)
(size 6 1)
(amplitude (/ 6.00 6)))
(make source
(src (make continuous-src (frequency (/ 2.267 100000) )))
(component Ez)
(center 9 0)
(size 6 1)
(amplitude (/ -6.00 12)))
(make source
(src (make continuous-src (frequency (/ 2.267 100000) )))
(component Ez)
(center -9 0)
( size 6 1)
(amplitude (/ -6.00 12)) ))
)
(set! symmetries (list (make mirror-sym (direction X))))
(set! pml-layers (list (make pml (thickness 3.0))))
(set! resolution 5)
(set! force-complex-fields? true)
(init-fields)
(define tol 0.001)
(define maxiters 500)
(define L 10)
(meep-fields-solve-cw fields tol maxiters L)
(output-epsilon)
(output-bfield)
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