Observe the magnetic field stream lines in the following structures in DC mode.
Figures (click
to enlarge)
single wire
loop
coil
two-wire
line
(co-parallel currents)
two-wire
line
(anti-parallel currents)
parallel-plate
line
(anti-parallel currents)
coaxial
line
(anti-parallel currents)
microstrip
line
(anti-parallel currents)
Figure 1: The magnetic (H-field) streamlines of a single wire.
Figure 2: The magnetic (H-field)
streamlines of a loop. The plot is in the
plane in a cylindrical coordinate system since the structure is rotationally symmetrical with respect
to the z-axis. Thus, the plot shows only one-half of the loop's cross-section.
Figure 3: The magnetic (H-field)
streamlines of an air-core coil. The plot is in the
plane in a cylindrical
coordinate system since the structure is rotationally symmetrical with respect
to the z-axis. Thus, the plot shows only one-half of the coil's cross-section.
Figure 4: The magnetic (H-field)
streamlines of a two-wire line with currents flowing in the same direction.
Figure 5: The magnetic (H-field)
streamlines of a two-wire line with currents flowing in opposite directions.
Figure 6: The magnetic (H-field)
streamlines in the cross-section of a parallel-plate line.
Figure 7: The magnetic
(H-field) streamlines in the cross-section of a coaxial line. The current
in the shield is opposite to the current in the central wire.
Figure 8: The magnetic (H-field)
streamlines in the cross-section of a microstrip line. The current in the
strip is opposite to the current in the ground plate.