Delay simulator for FM-CW range measuring apparatus

Details Delay simulator for FM-CW range measuring apparatus Delay simulator for FM-CW range measuring apparatus

1985-11-07

1987-07-07

Tubbesing, T. H.

Communications: directive radio wave systems and devices (e.g.,

Testing or calibrating of radar system

By simulation

G01S 740

Patent

active

046790497

ABSTRACT:
An FM-CW range measuring apparatus (1) to be tested generates a beat signal Fb at the frequency fb between transmitted and received waves. A simulator connected to this apparatus comprises a signal processing link, including a first HF interrupter (6), a circulator (7) and a second HF interrupter (8). A delay line (11) operating in the reflecting mode for producing the delay .tau. is connected to an input-output of the circulator means for controlling the interrupters (26, 28, 29, 33) effect opening thereof at a frequency f.sub.r (f.sub.r >2b), the first interrupter being opened during .delta. (.delta.<<1/f.sub.r), and the second interrupter during .delta.' (.delta.'.perspectiveto..delta.). The phase shift .tau.' between .delta. and .delta.' is such that the durations .delta. and .delta.' are separated from each other and that at least an echo of the order p in the delay line is defined by the equation:

REFERENCES:
patent: 3150369 (1964-09-01), Fontana
patent: 4121213 (1978-10-01), Bush et al.
patent: 4319247 (1982-03-01), Warren

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