In:
The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 65, No. S1 ( 1979-06-01), p. S48-S48
Abstract:
Study of a SAW nonlinear FM dispersive delay line (NLFM-DDL) for generating and processing power series FM (PFM) signals with time bandwidth product of 160 and fractional bandwidth of 32% is reported. Firstly, it deals with the SAW NLFM single dispersive delay line (SDDL), with it's design, theoretical and experimental result of the frequency response and the self-correlation pulse. It has been shown that the DDL can be used to produce signals with a power series frequency modulation and the observed sidelobe level of the self-correlated pulse of this NLFM-DDL is smaller than that of the LFM-DDL with transducers having no weightings. Secondly, a double dispersive delay line (DDDL) is discussed and shown that a wider bandwidth is easier to obtain by using a DDDL than by a SDDL. It is also to be shown that by the combined action of a pair of dispersive transducers, the total pulse length which is the combined response of the two is found equivalent to the response of a PFM signal. This design has been performed by means of computer.
Type of Medium:
Online Resource
ISSN:
0001-4966
,
1520-8524
Language:
English
Publisher:
Acoustical Society of America (ASA)
Publication Date:
1979
detail.hit.zdb_id:
1461063-2
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