Pulse compression filter designed as a dispersive delay line

Details Pulse compression filter designed as a dispersive delay line Pulse compression filter designed as a dispersive delay line

1982-05-12

1984-01-24

Nussbaum, Marvin L.

Wave transmission lines and networks

Coupling networks

Delay lines including elastic surface wave propagation means

333154, 333195, 333196, H03H 944, H03H 964, H03H 9145

Patent

active

044279540

ABSTRACT:
A pulse compression filter designed as a dispersive delay line functions with acoustic waves having a mean wavelength .lambda..sub.o in the filter. At least one input/output transducer or at least one reflector arrangement is provided with a plurality of electrode respectively reflector fingers distributed on a substrate in accordance with a prescribed transfer function which has a given bandwidth and whose Fourier transform has a given time duration T. Said fingers are divided into a plurality of N finger groups designed identical to one another with respect to the number fingers n and corresponding finger spacings of corresponding fingers. Each finger group has a length in a propagation direction of the acoustic wave in the filter which is at least equal to the mean wavelength .lambda..sub.o. Center spacings of adjacent finger groups from one another are non-equidistant in accordance with the prescribed transfer function. The plurality N of the finger groups is greater than the time bandwidth duration product (T.multidot.B).

REFERENCES:
patent: 3813618 (1974-05-01), Hartemann et al.
patent: 3882430 (1975-05-01), Maerfeld
patent: 3975697 (1976-08-01), Paige

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