Swif{40 s with special polarization for non-linear interactions

Claim 2

An acoustic-wave signal-translating device comprising: a medium propagative of acoustic surface waves and including a first portion exhibiting non-linearity of interaction between stress components and associated electric field components and a second portion exhibiting linearity of interaction between stress components and associated electric field components; an input transducer responsive to an electric signal of predetermined frequency and coupled to said first portion for developing electric fields in said medium that create associated non-linearly related stress components in the form of acoustic surface waves; and an output transducer coupled to said second portion of said medium and responsive to electric fields generated by associated linearly-related stress components produced by said acoustic waves for developing an output signal.

Claim 3

A translating device as defined in claim 1 in which said acoustic surface waves include a component harmonically related to said predetermined frequency and in which said output transducer develops output signals of the frequency of said harmonic component.

Claim 4

A translating device as defined in claim 2 in which said harmonic component has a frequency that is double that of said predetermined frequency.

Claim 5

A translating device as defined in claim 1 in which said first portion of said medium is non-poled and in which said second portion, to which said output transducer is coupled, is poled.

Claim 6

An acoustic-wave signal-translating device comprising: a medium propagative of acoustic surface waves and including a first portion exhibiting non-linearity of interaction between stress components and associated electric field components and a second portion exhibiting linearity of interaction between stress components and associated electric field components; a first transducer coupled to one of said portions and responsive to an applied electric signal for Developing electric fields in said medium that create stress components in the form of acoustic surface waves; and a second transducer coupled to the other of said portions and responsive to electric fields generated by stress components produced by said acoustic waves for developing an output signal.

Claim 7

An acoustic-wave signal-translating device comprising: a medium propagative of acoustic surface waves and including a first portion exhibiting non-linearity of interaction between stress components and associated electric field components and a second portion exhibiting linearity of interaction between stress components and associated electric field components; a first transducer coupled to one of said portions and responsive to an applied electric signal for Developing electric fields in said medium that create stress components in the form of acoustic surface waves; and a second transducer coupled to the other of said portions and responsive to electric fields generated by stress components produced by said acoustic waves for developing an output signal.

Claim 8

A translating device as defined in claim 1 which further includes a second input transducer that responds to a second input signal for launching additional acoustic waves in said medium that effectively interact with the first-mentioned acoustic waves.

Claim 9

A translating device as defined in claim 6 in which signal components represented by said additional acoustic waves are modulated upon said first-mentioned acoustic waves and said output transducer developing a correspondingly modulated output signal.

Claim 10

A translating device as defined in claim 6 in which both said second input transducer and said output transducer interact with electric fields linearly related with associated stress components in said medium.

Claim 11

A translating device as defined in claim 6 in which said second input signal has a frequency lower than said predetermined frequency and said output signal has a frequency twice that of the first input signal.

Claim 12

A translating device as defined in claim 6 in which said first-mentioned acoustic waves parametrically interact with said additional acoustic waves and said output transducer responds to an amplified level of acoustic wave energy.

Claim 13

An acoustic-wave signal-translating device comprising: a ferroelectric ceramic medium propagative of acoustic surface waves and including a first non-poled portion exhibiting non-linearity of interaction between stress components and associated electric field components and a second poled portion exhibiting linearity of interaction between stress components and associated electric field components, said first and second portions of said medium demarcated by a rectilinear demarcation line; an input transducer coupled to said first portion of said medium and responsive to an electric signal of predetermined frequency and of sufficient magnitude to alternately pole and depole said first portion of said medium for developing electric fields in said medium that create associated non-linearly related stress components in the form of acoustic surface waves, said input transducer and said medium being arranged to cause said acoustic waves to propagate in a direction normal to said demarcation line; and an output transducer coupled to said second portion of said medium and responsive to electric fields generated by associated linearly-related stress components produced by said acoustic waves for developing an output signal.

Claim 14

An acoustic-wave signal-translating device comprising: a ferroelectric ceramic medium propagative of acoustic surface waves and including a first non-poled portion exhibiting non-linearity of interaction between stress components and associated electric field components and a second poled portion exhibiting linearity of interaction between stress components and associated electric field components, said first and second portions of said medium demarcated by a rectilinear demarcation line; an input transducer coupled to said first portion of said medium and responsive to an electric signal of predetermined frequency and of sufficient magnitude to alternately pole and depole said first portion of said medium for developing electric fields in said medium that create associated non-linearly related stress components in the form of acoustic surface waves, said input transducer and said medium being arranged to cause said acoustic waves to propagate in a direction normal to said demarcation line; and an output transducer coupled to said second portion of said medium and responsive to electric fields generated by associated linearly-related stress components produced by said acoustic waves for developing an output signal.

Claim 15

A translating device as defined in claim 11 in which said acoustic surface waves include a component harmonically related to said predetermined frequency and in which said output transducer develops output signals of the frequency of said harmonic component.

Claim 16

A translating device as defined in claim 12 in which said harmonic component has a frequency that is double that of said predetermined frequency.

Claim 17

A translating device as defined in claim 11 which further includes a second input transducer that responds to a second input signal for launching additional acoustic waves in said medium that effectively interact with the first-mentioned acoustic waves.

Claim 18

A translating device as defined in claim 14 in which signal components represented by said additional acoustic waves are modulated upon said first-mentioned acoustic waves and said output transducer developing a correspondingly modulated output signal.

Claim 19

A translating device as defined in claim 14 in which both said second input transducer and said output transducer interact with electric fields linearly related with associated stress components in said medium.

Claim 20

A translating device as defined in claim 14 in which said second input signal has a frequency lower than said predetermined frequencY and said output signal has a frequency twice that of the first input signal.

Claim 21

A translating device as defined in claim 14 in which said first-mentioned acoustic waves parametrically interact with said additional acoustic waves and said output transducer responds to an amplified level of acoustic wave energy.