DELAY DEVICE AND METHOD OF EMULATING RADAR SIGNAL PROPAGATION DELAYS

• Main Authors: NICHOLLS, Charles William Tremlett, GALE, Daniel Peter
• Format: Patent
• Language: English; French; German
• Published: 06.12.2023
• Subjects: ANALOGOUS ARRANGEMENTS USING OTHER WAVES; AUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATIONOF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES; BASIC ELECTRONIC CIRCUITRY; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; ELECTRICITY; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES; MEASURING; PHYSICS; RADIO DIRECTION-FINDING; RADIO NAVIGATION; TESTING

A delay device includes a tuning network including first and second tuning components having frequency responses that overlap in an intermediate frequency band to provide a group delay response. A delay modifier is in communication with the tuning network and configured to provide an offset frequency as an input to the tuning network, and to electronically adjust a group delay value associated with the group delay response by varying the offset frequency. The difference between a frequency of an input reference signal and a local oscillator frequency produced by the delay modifier is substantially equal to an intermediate frequency of the tuning network. The tuning network and the delay modifier cooperate to transpose the reference signal at the reference frequency down to the IF band before passing through the first and second delay lines, and back up to the RF band after passing through the first and second delay lines.