An X-band acousto-optic variable delay line for radar target simulation

High‐speed, high‐resolution methodology for portable universal radar target‐echo simulator

“…In the Acousto-Optic delay line, an RF-input signal is converted to an acoustic wave using a transducer, and it is sent through an Acousto-Optic interaction medium. 3 Multirate sampling techniques are also used for real-time target simulation, and are implemented in Körner et al 8 This paper presents a novel technique for capturing and processing high-bandwidth radar waveforms employing digital parallelization techniques, and associated signal processing for target simulation. This RTS simulates up to six targets at a time.…”

“…The range simulation is performed by delaying the radar‐transmitted RF signal proportional to the range $$\tau =2\ast R\unicode{x02215}c$$, 2 where traditional options include Acousto‐Optic variable delay line, 3 fiber optical delay line, 4 coaxial delay line, 5 Surface Acoustic Wave delay lines, 6 DRFM techniques, 7 and so forth. In the Acousto‐Optic delay line, an RF‐input signal is converted to an acoustic wave using a transducer, and it is sent through an Acousto‐Optic interaction medium 3 . Multirate sampling techniques are also used for real‐time target simulation, and are implemented in Körner et al 8 …”

Microelectromechanical delay lines with slow signal propagation

“…In these applications, long acoustic delays and short transmission distances guard against interference from multipath radio propagation. In radar systems, delay lines are used, for example, to create a delayed replica of the transmit signal to correlate with the received signal reflected from the target [4], to compensate for phase errors in FMCW radars [5] or to simulate a target [6]. In delay-line oscillators, long delay stabilizes the frequency and suppresses off-carrier phase noise [7][8][9][10].…”