Magnetostatic wave (MSW) filter with sharp upper cut-off frequen

Details Magnetostatic wave (MSW) filter with sharp upper cut-off frequen Magnetostatic wave (MSW) filter with sharp upper cut-off frequen

1989-09-11

1991-05-21

Laroche, Eugene R.

Wave transmission lines and networks

Plural channel systems

Having branched circuits

333202, H01P 1213, H01P 1215

Patent

active

050178954

ABSTRACT:
In the present invention the upper edge of the frequency response of the magnetostatic wave (MSW) filter is sharpened. A band limiting element (BLE) is coupled to the MSW filter, preferably in the filter element output. In one embodiment the BLE absorbs signals above a certain frequency in the upper band edge of the MSW. In another embodiment, the BLE reinforces the output response.

REFERENCES:
patent: 3353119 (1967-11-01), Honig et al.
patent: 4395686 (1983-07-01), Adam
patent: 4614919 (1986-09-01), Floyd
patent: 4845439 (1989-07-01), Stitzer et al.
Adam, Annual Frequency Control Symposium 1982; "Magnetostatic Wave Multi-Channel Filters".
Murakami et al., 1985 IEEE MTT-S Digest; (K4), pp. 285-288.
Adam, 1985 IEEE Ultrasonics Symposium, pp. 157-162.
Adam, IEEE Transactions on Magnetics, 1987, vol. MAG-23, No. 5, 9/1987, pp. 3742-3744.
Takeda, 1987 IEEE Transactions on Magnetics, pp. 3340-3342.
Murakami et al., 1987 IEEE MTT-S Digest, (J-33), pp. 371-374.
Adam et al., 1988 IEEE MTT-S Digest, (FF-4); pp. 879-882.

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