Wave transmission lines and networks – Coupling networks – Electromechanical filter
Patent
1990-05-02
1991-12-31
Budd, Mark O.
Wave transmission lines and networks
Coupling networks
Electromechanical filter
310313D, 310313R, H03H 925
Patent
active
050775456
ABSTRACT:
A surface acoustic wave (SAW) waveguide-coupled resonator filter is overcoupled to produce an essentially constant conductance and susceptance over at least the bandwidth of a desired notch filter. The SAW resonator filter is embedded in a bridged-T allpass circuit to provide the pair of equal capacitances of the circuit, and the resonator ground is connected to one terminal of the parallel inductor of the circuit having the other terminal connected to a system ground.
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"Low Loss Multipole SAW Resonator Filters", by E. Staples et al., 1980, IEEE MTT-S International Microwave Symposium Digest; pp. 34-36.
Gopani Sunder G.
Horine Brent H.
Budd Mark O.
Dougherty Thomas M.
Sawtek Inc.
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