FIELD: radio electronics.
SUBSTANCE: invention relates to radio electronics. To achieve the effect, a band-pass filter based on surface acoustic waves is proposed, which contains a piezoelectric substrate, on the working surface of which two acoustic channels are placed, each of which contains input and output interdigital transducers, a shielding element is located between the input and output interdigital transducers, and on the an acoustic absorber is deposited on the edges of the substrate, each interdigital transducer of the input transducer is apodized, the output transducers are made in a unidirectional design in the form of a single non-apodized equidistant interdigital transducer installed between two arms of a U-shaped multistrip coupler with equal energy division.
EFFECT: triple-pass signal compensation, reduction of passband ripple, reduction of passband group lag ripple, increase of rejection in the stopband, increase of filter squareness, reduction of filter insertion attenuation.
6 cl, 8 dwg
| Title | Year | Author | Number |
|---|---|---|---|
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|
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|
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