{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,22]],"date-time":"2025-11-22T17:05:22Z","timestamp":1763831122721,"version":"build-2065373602"},"reference-count":20,"publisher":"MDPI AG","issue":"7","license":[{"start":{"date-parts":[[2020,4,2]],"date-time":"2020-04-02T00:00:00Z","timestamp":1585785600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Microwave thermometry is a noninvasive and passive technique for measuring internal body temperature. Wearable compact antennas, matched to the specific body area, are required for this method. We present a new epidermal wideband antenna for medical radiometry. The double asymmetric H-shaped slot antenna was designed to be matched to different parts of the body without fat layers. The slots are fed by a short-circuited microstrip line in order to decrease size and back radiation, thus reducing potential interferences. In this way, contribution to radiometric temperature due to back radiation is lower than 4%, versus the 20% of the volume under investigation, over the whole operating frequency band. The designed prototype was manufactured on a flexible substrate. The antenna is a very small size, to make it comfortable and suitable for being used by patients with different body mass indexes. The double H-shaped antenna shows good wideband matching results from around 1.5 GHz up to 5 GHz, in different body locations such as the neck, foot instep and foot sole.<\/jats:p>","DOI":"10.3390\/s20071987","type":"journal-article","created":{"date-parts":[[2020,4,2]],"date-time":"2020-04-02T11:57:14Z","timestamp":1585828634000},"page":"1987","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":10,"title":["Wideband Epidermal Antenna for Medical Radiometry"],"prefix":"10.3390","volume":"20","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9498-4586","authenticated-orcid":false,"given":"Germ\u00e1n","family":"Le\u00f3n","sequence":"first","affiliation":[{"name":"Department of Electrical Engineering, Group of Signal Theory and Communications, Universidad de Oviedo, 33202 Gij\u00f3n, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9932-3181","authenticated-orcid":false,"given":"Luis F.","family":"Herr\u00e1n","sequence":"additional","affiliation":[{"name":"Department of Electrical Engineering, Group of Signal Theory and Communications, Universidad de Oviedo, 33202 Gij\u00f3n, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ignacio","family":"Mateos","sequence":"additional","affiliation":[{"name":"Applied Magnetism and Optics Group, Universidad de C\u00e1diz, 11519 C\u00e1diz, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1028-6957","authenticated-orcid":false,"given":"Enrique","family":"Villa","sequence":"additional","affiliation":[{"name":"IACTec Medical Technology Group, Instituto de Astrof\u00edsica de Canarias (IAC), 38205 San Crist\u00f3bal de La Laguna, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3545-2328","authenticated-orcid":false,"given":"Juan B.","family":"Ruiz-Alzola","sequence":"additional","affiliation":[{"name":"IACTec Medical Technology Group, Instituto de Astrof\u00edsica de Canarias (IAC), 38205 San Crist\u00f3bal de La Laguna, Spain"},{"name":"Instituto Universitario de Investigaci\u00f3n Biom\u00e9dica y Sanitaria (IUIBS), Universidad de Las Palmas de Gran Canaria (ULPGC), 35001 Las Palmas de Gran Canaria, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2020,4,2]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1862","DOI":"10.1109\/22.44095","article-title":"Microwave radiometry: Its importance to the detection of cancer","volume":"37","author":"Carr","year":"1989","journal-title":"IEEE Trans. Microw. Theory Technol."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"285","DOI":"10.1016\/0304-3835(86)90149-7","article-title":"Detection of extravasation of antineoplastic drugs by microwave radiometry","volume":"31","author":"Shaeffer","year":"1986","journal-title":"Cancer Lett."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"1737","DOI":"10.1109\/TMTT.2002.800424","article-title":"Multifrequency radiometric determination of temperature profiles in a lossy homogeneous phantom using a dual-mode antenna with integral water bolus","volume":"50","author":"Jacobsen","year":"2002","journal-title":"IEEE Trans. Microw. Theory Technol."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"2535","DOI":"10.1109\/TMTT.2017.2776952","article-title":"Noninvasive internal body temperature tracking with near-field microwave radiometry","volume":"66","author":"Momenroodaki","year":"2018","journal-title":"IEEE Trans. Microw. Theory Technol."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"1645","DOI":"10.1016\/j.jacc.2012.01.033","article-title":"First in vivo applications of microwave radiometry in human carotids. A new noninvasive method for detection of local inflammatory activation","volume":"59","author":"Toutouzas","year":"2012","journal-title":"J. Am. Coll. Cardiol."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"1109","DOI":"10.1016\/j.jdiacomp.2017.04.022","article-title":"Multi-center feasibility study of microwave radiometry thermometry for non-invasive differential diagnosis of arterial disease in diabetic patients with suspected critical limb ischemia","volume":"31","author":"Spiliopoulos","year":"2017","journal-title":"J. Diabetes Complicat."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"1856","DOI":"10.1109\/LAWP.2016.2539970","article-title":"Design of compact cross-fed three-dimensional slot-loaded antenna and its application in wideband head imaging system","volume":"15","author":"Mobashasher","year":"2016","journal-title":"IEEE Antennas Wirel. Propag. Lett."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"844","DOI":"10.1109\/LAWP.2014.2320495","article-title":"Wideband and unidirectional folded antenna for heart failure detection system","volume":"13","author":"Rezaeieh","year":"2014","journal-title":"IEEE Antennas Wirel. Propag. Lett."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"798","DOI":"10.1109\/LAWP.2014.2318035","article-title":"Slot-loaded folded dipole antenna with wideband and unidirectional performance for L-Band applications","volume":"13","author":"Mobashsher","year":"2014","journal-title":"IEEE Antennas Wirel. Propag. Lett."},{"key":"ref_10","doi-asserted-by":"crossref","unstructured":"Zheng, C., Jiang, X., Kang, B., Li, X., and Geng, Z. (2017, January 16\u201319). Design of an on-body matched wide-slot UWB Antenna for brain activities detection. Proceedings of the Sixth Asia-Pacific Conference on Antennas and Propagation (APCAP), Xi\u2019an, China.","DOI":"10.1109\/APCAP.2017.8420350"},{"key":"ref_11","doi-asserted-by":"crossref","unstructured":"T\u00f8mmer, M., Kjelgard, K.G., and Lande, T.S. (2016, January 14\u201315). Body-Coupled wideband monopole antenna. Proceedings of the Loughborough Antennas & Propagation Conference (LAPC), Loughborough, UK.","DOI":"10.1109\/LAPC.2016.7807483"},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"1808","DOI":"10.1109\/TAP.2013.2297158","article-title":"Compact double-layer on-body matched bowtie antenna for medical diagnosis","volume":"62","author":"Li","year":"2014","journal-title":"IEEE Trans. Antenna Propag."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"263","DOI":"10.1109\/TBME.2011.2172441","article-title":"Improved radiometric performance attained by an elliptical microwave antenna with suction","volume":"59","author":"Klemetsen","year":"2012","journal-title":"IEEE Trans. Biomed. Eng."},{"key":"ref_14","doi-asserted-by":"crossref","unstructured":"Zebiri, C., Sayad, D., Elfergani, I., Iqbal, A., Mshwat, W.F., Kosha, J., Rodriguez, J., and Abd-Alhameed, R. (2019). A Compact Semi-Circular and Arc-Shaped Slot Antenna for Heterogeneous RF Front-Ends. Electronics, 8.","DOI":"10.3390\/electronics8101123"},{"key":"ref_15","doi-asserted-by":"crossref","unstructured":"Di Serio, A., Buckley, J., Barton, J., Newberry, R., Rodencal, M., Dunlop, G., and O\u2019Flynn, B. (2018). Potential of Sub-GHz Wireless for Future IoT Wearables and Design of Compact 915 MHz Antenna. Sensors, 18.","DOI":"10.3390\/s18010022"},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"143","DOI":"10.1002\/mop.1110","article-title":"A comparison among different reduced-size resonant microstrip patches","volume":"29","author":"Boix","year":"2001","journal-title":"Microw. Opt. Technol. Lett."},{"key":"ref_17","unstructured":"(2020, February 10). Ansys HFSS Software, Version 19.2. Available online: http:\/\/www.ansys.com\/."},{"key":"ref_18","unstructured":"(2020, February 10). Dielectric Properties of Body Tissues. Available online: http:\/\/niremf.ifac.cnr.it\/tissprop\/."},{"key":"ref_19","unstructured":"International Commission on Non-Ionizing Radiation Protection (1998). Guidelines for limiting exposure to time-varying electric, magnetic, and electromagnetic fields (up to 300 GHz). Health Phys., 74, 494\u2013522."},{"key":"ref_20","unstructured":"(2020, February 10). SPEAG. Available online: www.speag.swiss."}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/20\/7\/1987\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T09:14:37Z","timestamp":1760174077000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/20\/7\/1987"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2020,4,2]]},"references-count":20,"journal-issue":{"issue":"7","published-online":{"date-parts":[[2020,4]]}},"alternative-id":["s20071987"],"URL":"https:\/\/doi.org\/10.3390\/s20071987","relation":{},"ISSN":["1424-8220"],"issn-type":[{"type":"electronic","value":"1424-8220"}],"subject":[],"published":{"date-parts":[[2020,4,2]]}}}