Geometry of the notch filter. The wave propagates along the axis, parallel to the applied field. The outer metallic layers are assumed to be a highly conductive material such as Ag.
Transmission loss as a function of frequency for different positions of the magnetic Fe layer. The Fe film is thick. There are four positions graphed, each with the Fe film moved a certain distance away from one edge of the waveguide: away, 0.75, 1.5, and (right in the middle). The attenuation at resonance is largest for when the Fe film is in the center of the waveguide and the dip width is the narrowest at the same position.
Transmission loss at resonance as a function of the thickness of the Fe film. The sum of the total thickness for all dielectric layers is . For the magnetic material at the edge, the attenuation reaches a maximum at . In the middle, the attenuation reaches a maximum at .
Rejection bandwidth as a function of the magnetic film’s distance from the edge of the waveguide. The bandwidth decreases as the magnetic film approaches the center of the waveguide. The total sum of the dielectric layers is . The Fe film is thick.
Transmission loss as a function of frequency for three different thicknesses of the magnetic Fe layer: 0.075, 0.100, and . The Fe film is at the center of the waveguide. As the thickness increases, both the attenuation and the dip width increase. The total sum of the dielectric layers is .
Rejection bandwidth as a function of thickness of the Fe film. When the film thickness is above , rejection bandwidth increases linearly with thickness.
Effective medium calculation of the transmission loss for an EM wave in a layered structure with a thick Fe layer and a thick layer.
Cross section of the waveguide structure showing the transition from the pure dielectric waveguide to the waveguide with a ferromagnetic film.
Return loss as a function of frequency for different thicknesses of the Fe layer with the dielectric layer at a constant thickness of . The calculation is done with the effective medium method.
Return loss as a function of frequency for different thicknesses of the dielectric layer with the Fe layer at a constant thickness of .
Return loss vs frequency for an EM wave in a waveguide interfacing with an effective medium of a thick layer of Fe and a thick layer of .
Calculation for the maximum return loss of an EM wave encountering the interface shown in Fig. 8 vs the FMR linewidth of the magnetic material. In region two the Fe layer is thick and the combined thickness of the two layers of is .
Experimental data of return loss vs frequency for a microstrip geometry using a thick layer of Fe and a thick layer of .
Article metrics loading...
Full text loading...