TY  - JOUR
T1  - Review on High Resolution Wide Swath SAR System Using Frequency Scanning
AU  - Yim, Jungbin 
AU  - Kim, Donghyun 
AU  - Ban, Inmo 
AU  - Lee, Namyoon 
JO  - The Journal of Korean Institute of Communications and Information Sciences
PY  - 2025
DA  - 2025/1/1
DO  - 10.7840/kics.2025.50.10.1617
KW  - high resolution wide swath SAR
KW  - beam squint
KW  - frequency scanning
AB  - A key research topic in spaceborne synthetic aperture radar (SAR) systems is the development of high-resolution wide-swath (HRWS) imaging techniques that overcome the fundamental trade-off between image resolution and swath width. In general, achieving high resolution in SAR systems requires a high pulse repetition frequency (PRF), whereas wide-swath observation necessitates a lower PRF. To address this inherent limitation, various SAR techniques have been proposed. Among them, representative approaches for HRWS imaging include scanning on receive (SCORE) and frequency scanning (F-scan). This paper provides a tutorial overview of the valid PRF range for SAR image formation and illustrates the trade-off between resolution and swath width. Furthermore, it introduces the frequency scanning technique as a promising solution to this trade-off and demonstrates its effectiveness through simulation results.