{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T01:14:37Z","timestamp":1760145277433,"version":"build-2065373602"},"reference-count":28,"publisher":"MDPI AG","issue":"13","license":[{"start":{"date-parts":[[2024,6,28]],"date-time":"2024-06-28T00:00:00Z","timestamp":1719532800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Universitas Indonesia through the PUTI Q1 Grant","award":["NKB-479\/UN2.RST\/HKP.05.00\/2024"],"award-info":[{"award-number":["NKB-479\/UN2.RST\/HKP.05.00\/2024"]}]},{"name":"Lembaga Pengelola Dana Pendidikan (LPDP) through the Riset dan Inovasi untuk Indonesia Maju (RIIM) program","award":["NKB-479\/UN2.RST\/HKP.05.00\/2024"],"award-info":[{"award-number":["NKB-479\/UN2.RST\/HKP.05.00\/2024"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>Synthetic aperture radar (SAR) is a powerful tool in remote sensing applications that can produce high-resolution images and operate in any weather condition. It is composed of many RF components, such as the IQ mixer, which mixes the base chirp signal (IF) with the carrier signal (LO) and increases the bandwidth of the transmitted signal to twice the maximum frequency of the base chirp signal, reducing the workload of Programmable Field Gate Arrays (FPGA) and increasing the resolution of the SAR system. This research proposes a power combiner\u2013splitter design that will be used as a supporting component to construct the IQ mixer in SAR applications based on a rat-race coupler. The measurement results show that the coupler has good S-parameter values.\u00a0S11,\u00a0S22, and\u00a0S33\u00a0have a low reflection value below \u221217 dB,\u00a0S13\u00a0has a high isolation value below \u221222 dB, and\u00a0S21\u00a0and\u00a0S31\u00a0have a low attenuation value below \u22124 dB with amplitude unbalance below 0.1 dB and phase unbalance below 1\u00b0. The 150 MHz requirement bandwidth for the RF signal is also achieved.<\/jats:p>","DOI":"10.3390\/rs16132386","type":"journal-article","created":{"date-parts":[[2024,7,1]],"date-time":"2024-07-01T08:17:29Z","timestamp":1719821849000},"page":"2386","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["A Power Combiner\u2013Splitter Based on a Rat-Race Coupler for an IQ Mixer in Synthetic Aperture Radar Applications"],"prefix":"10.3390","volume":"16","author":[{"ORCID":"https:\/\/orcid.org\/0009-0006-8207-8021","authenticated-orcid":false,"given":"Abdurrasyid","family":"Ruhiyat","sequence":"first","affiliation":[{"name":"Department of Electrical Engineering, Universitas Indonesia, Depok 16424, Indonesia"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6498-960X","authenticated-orcid":false,"given":"Farohaji","family":"Kurniawan","sequence":"additional","affiliation":[{"name":"Research Center for Aeronautics Technology, National Research and Innovation Agency, Jakarta Pusat 10340, Indonesia"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7843-6352","authenticated-orcid":false,"given":"Catur","family":"Apriono","sequence":"additional","affiliation":[{"name":"Department of Electrical Engineering, Universitas Indonesia, Depok 16424, Indonesia"}]}],"member":"1968","published-online":{"date-parts":[[2024,6,28]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"2013","DOI":"10.1109\/LGRS.2017.2747602","article-title":"Recent Advances in Synthetic Aperture Radar Remote Sensing-Systems, Data Processing, and Applications, data processing, and applications","volume":"14","author":"Sun","year":"2017","journal-title":"IEEE Geosci. 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Mini-Circuits, ZX10R-2-183-S+ 2 Ways Resistive Power Splitter. Available online: https:\/\/www.minicircuits.com\/pdfs\/ZX10R-2-183-S+.pdf."}],"container-title":["Remote Sensing"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2072-4292\/16\/13\/2386\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,10]],"date-time":"2025-10-10T15:07:13Z","timestamp":1760108833000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2072-4292\/16\/13\/2386"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2024,6,28]]},"references-count":28,"journal-issue":{"issue":"13","published-online":{"date-parts":[[2024,7]]}},"alternative-id":["rs16132386"],"URL":"https:\/\/doi.org\/10.3390\/rs16132386","relation":{},"ISSN":["2072-4292"],"issn-type":[{"type":"electronic","value":"2072-4292"}],"subject":[],"published":{"date-parts":[[2024,6,28]]}}}