{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,25]],"date-time":"2025-10-25T19:14:32Z","timestamp":1761419672998,"version":"3.37.3"},"reference-count":10,"publisher":"Wiley","license":[{"start":{"date-parts":[[2017,1,1]],"date-time":"2017-01-01T00:00:00Z","timestamp":1483228800000},"content-version":"unspecified","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100004085","name":"Ministry of Education, Science, and Technology","doi-asserted-by":"crossref","award":["NRF-2015M1A7A1A02002291"],"award-info":[{"award-number":["NRF-2015M1A7A1A02002291"]}],"id":[{"id":"10.13039\/501100004085","id-type":"DOI","asserted-by":"crossref"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Journal of Sensors"],"published-print":{"date-parts":[[2017]]},"abstract":"<jats:p>An amplitude-modulated and frequency-modulated (AM-FM) radar with an active reflector to produce high-accuracy distance measurements is proposed and demonstrated in this paper. The proposed radar consists of an AM-FM base module and an active reflector. The combination of AM and FM modulations resolves ambiguity of the absolute distance in typical AM radars, while improving range accuracy in typical FM radars with narrow bandwidth. Also, the active reflector, which translates the frequency of the received signal, resolves the problem of phase detection interference due to the direct Tx-to-Rx leakage in AM radars. In this paper, the operating principle, experimental tests, and analysis are presented. The implemented AM-FM radar operates in X-band (Tx: 10.5\u2009GHz, Rx: 8.5\u2009GHz) with the 620\u2009MHz bandwidth. The measured range accuracy of less than \u00b110\u2009mm at a distance of 70\u2009m is obtained.<\/jats:p>","DOI":"10.1155\/2017\/8589469","type":"journal-article","created":{"date-parts":[[2017,1,30]],"date-time":"2017-01-30T16:06:33Z","timestamp":1485792393000},"page":"1-8","source":"Crossref","is-referenced-by-count":0,"title":["High-Accuracy AM-FM Radar with an Active Reflector"],"prefix":"10.1155","volume":"2017","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-6343-3178","authenticated-orcid":true,"given":"Mun Gak","family":"Choi","sequence":"first","affiliation":[{"name":"School of Electronics Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu 41566, Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2776-3281","authenticated-orcid":true,"given":"Dong Sik","family":"Woo","sequence":"additional","affiliation":[{"name":"Department of Aviation Information and Communications Engineering (KAI-TECH), Kyungwoon University, 730 Gangdong-ro, Sandong-myun, Gumi 39610, Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hyun Chul","family":"Choi","sequence":"additional","affiliation":[{"name":"School of Electronics Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu 41566, Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3959-9191","authenticated-orcid":true,"given":"Kang Wook","family":"Kim","sequence":"additional","affiliation":[{"name":"School of Electronics Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu 41566, Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","reference":[{"key":"2","doi-asserted-by":"publisher","DOI":"10.1007\/s11431-010-4111-4"},{"key":"3","doi-asserted-by":"publisher","DOI":"10.1109\/tmtt.2009.2035945"},{"key":"6","doi-asserted-by":"publisher","DOI":"10.1109\/LAWP.2005.844145"},{"key":"8","doi-asserted-by":"publisher","DOI":"10.1109\/tmtt.2004.838281"},{"key":"11","doi-asserted-by":"publisher","DOI":"10.1201\/9781584888543"},{"year":"2004","key":"12"},{"issue":"2","key":"13","volume":"2","year":"2009","journal-title":"International Journal of Signal Processing, Image Processing and Pattern Recognition"},{"key":"14","doi-asserted-by":"publisher","DOI":"10.1109\/tane3.1962.4201896"},{"key":"15","doi-asserted-by":"publisher","DOI":"10.1088\/0741-3335\/38\/7\/002"},{"key":"16","doi-asserted-by":"publisher","DOI":"10.1109\/tgrs.1984.350610"}],"container-title":["Journal of Sensors"],"original-title":[],"language":"en","link":[{"URL":"http:\/\/downloads.hindawi.com\/journals\/js\/2017\/8589469.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"http:\/\/downloads.hindawi.com\/journals\/js\/2017\/8589469.xml","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"http:\/\/downloads.hindawi.com\/journals\/js\/2017\/8589469.pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2017,1,30]],"date-time":"2017-01-30T16:06:36Z","timestamp":1485792396000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.hindawi.com\/journals\/js\/2017\/8589469\/"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2017]]},"references-count":10,"alternative-id":["8589469","8589469"],"URL":"https:\/\/doi.org\/10.1155\/2017\/8589469","relation":{},"ISSN":["1687-725X","1687-7268"],"issn-type":[{"type":"print","value":"1687-725X"},{"type":"electronic","value":"1687-7268"}],"subject":[],"published":{"date-parts":[[2017]]}}}