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THE BAND-STOP FILTER DEVICE IN GHZ FREQUENCY RANGE

[Category : - Computers and computer accessories ]
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A band-stop filter device in a GHz frequency range using a ferromagnetic resonance of a magnetic film is provided to select a frequency band by adjusting a size of the magnetic film. A band-stop filter device in a GHz frequency range using a ferromagnetic resonance of a magnetic film includes a glass substrate(10), a Cu/Ti seed layer(20), a Cu coplanar waveguide, an insulator(40), and a magnetic film(50). A band-stop filter is formed on the glass substrate. The Cu/Ti seed layer is deposited on the glass substrate, and is formed at a thickness of 1000AA and 100AA by a radio frequency sputtering to increase an adhesive of a coplanar waveguide and the glass substrate. The Cu coplanar waveguide is formed on the Cu/Ti seed layer and has a coplanar signal line and first and second coplanar ground lines. The coplanar signal line is provided as an input unit and an output unit. The first and second coplanar ground lines are formed on the Cu/Ti seed layer. The insulator is formed on the coplanar signal line and is coated with a polyimide or a silicon oxide under a nitrogen atmosphere between the coplanar signal line and the magnetic thin film. The magnetic thin film is formed on the insulator, and is formed on a corresponding region to the coplanar waveguide or a micro strip line.


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You can have as co-Planar waveguide and microstrip line over a signal transmission line by adjusting the size of the magnetic thin films by patterning, the cut off frequency of the RF frequency band of filter and band stop filter function as, By patterning the magnetic film is deposited on a transmission line, the near-field noise ferromagnetic resonance absorption principle, the signal transmission lines and can be absorbed by the noise, By adjusting the size of the magnetic thin films, and the role of the RF frequency band, wideband noise suppressor,
If you are using a magnetic thin film over a signal transmission line, the transmission wavelength of the signal with the signal transmission line itself about 10 to 50%, depending on the form and type of magnetic thin films can be reduced by reducing the length of the signal transmission line.







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