@inproceedings{e3de50587e454433ba71568266e9323b,
title = "Local Oscillator Phase Shifter for IQ Mixer in A Synthetic Aperture Radar Application Based on Quadrature Hybrid Branch-line Coupler",
abstract = "Synthetic Aperture Radar (SAR) is a powerful instrument in microwave remote sensing applications because of its capability for all-weather time operation and producing high-resolution images. The IQ mixer is a vital component of the RF (radio frequency) SAR subsystem, which increases the bandwidth of the transmitted signal and improves the resolution of the SAR system. The IQ mixer is composed of a quadrature LO phase shifter, two matched mixers, and a power combiner-splitter. This paper proposes a design for a quadrature LO phase shifter based on a microstrip quadrature hybrid branch-line coupler. The coupler provides different good phase outputs around 90. The output and input transmission lines have been placed on the outer side of the coupler to offer a flat gain over a range bandwidth (150 MHz), positively influencing the output response. The fabricated coupler satisfies all the specification requirements and can be used as an LO phase shifter.",
keywords = "coupler, IQ mixer, local oscillator, phase shifter, synthetic aperture radar",
author = "Abdurrasyid Ruhiyat and Farohaji Kurniawan and Catur Apriono",
note = "Publisher Copyright: {\textcopyright} 2024 IEEE.; 10th International Conference on Wireless and Telematics, ICWT 2024 ; Conference date: 04-07-2024 Through 05-07-2024",
year = "2024",
doi = "10.1109/ICWT62080.2024.10674696",
language = "English",
series = "Proceeding of 2024 the 10th International Conference on Wireless and Telematics, ICWT 2024",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
booktitle = "Proceeding of 2024 the 10th International Conference on Wireless and Telematics, ICWT 2024",
address = "United States",
}