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飥 Measurement and Simulation
1 2 3
Chenchen Li , Shang-Te Yang , and Hao Ling
Dept. of Electrical and Computer Engineering, The University of Texas at Austin, Austin, USA
1cjli@, 2shangte.yang@, 3ling@
Abstract鈥擨nverse synthetic aperture radar (ISAR) images of II. METHODOLOGY
a windmill are presented. In-situ measurement data of an 18-
blade windmill are collected using an ultra-wideband radar. The A. Measurement Synopsis
measured signatures are compared to simulation results based In-situ measurements were made at a local windmill in
on physical optics. The backscattering phenomenology is
Cedar Park, Texas using the Time Domain ultra-wideband
examined in the sinogram, spectrogram, and ISAR image
domains. In addition, a composite image is generated from radar system. Two dual-ridged broadband horns were used as
multiple ISAR snapshots to reveal the entire windmill structure. transmitting and receiving antennas. The radar emits short
pulses at a pulse repetition frequency of 10 MHz with an
Index Terms鈥擶ind farm, radar, radar imaging.
equivalent frequency bandwidth from 3.1 to 5.3 GHz. The
I.
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