{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,14]],"date-time":"2025-10-14T00:39:31Z","timestamp":1760402371757,"version":"build-2065373602"},"reference-count":15,"publisher":"MDPI AG","issue":"8","license":[{"start":{"date-parts":[[2020,4,20]],"date-time":"2020-04-20T00:00:00Z","timestamp":1587340800000},"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>Large constellations of low-orbit satellites have already been launched with the aim of offering complete worldwide coverage of broadband Internet; however, compact, simple, and low-cost mobile terminals are necessary to establish the communication. This paper describes the design of a reconfigurable and compact filtenna with the ability to switch between the satellites\u2019 uplink and downlink frequencies, 20 GHz and 29 GHz, maintaining an excellent performance. Due to its simplicity, efficiency, and Rx\/Tx isolation, this antenna is a relevant candidate to be part of mobile terminals and devices, or even sensors, that communicate with satellites.<\/jats:p>","DOI":"10.3390\/s20082333","type":"journal-article","created":{"date-parts":[[2020,4,21]],"date-time":"2020-04-21T04:49:38Z","timestamp":1587444578000},"page":"2333","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Reconfigurable Diplexer-Based Filtenna for Tx\/Rx Operation in Mobile Satellite Terminals"],"prefix":"10.3390","volume":"20","author":[{"given":"Lu\u00eds","family":"Rodrigues","sequence":"first","affiliation":[{"name":"Universidade de Aveiro, Campus Universit\u00e1rio de Santiago, 3810-193 Aveiro, Portugal"},{"name":"Instituto de Telecomunica\u00e7\u00f5es, Campus Universit\u00e1rio de Santiago, 3810-193 Aveiro, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4766-9110","authenticated-orcid":false,"given":"Tiago","family":"Varum","sequence":"additional","affiliation":[{"name":"Instituto de Telecomunica\u00e7\u00f5es, Campus Universit\u00e1rio de Santiago, 3810-193 Aveiro, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7907-1028","authenticated-orcid":false,"given":"Jo\u00e3o N.","family":"Matos","sequence":"additional","affiliation":[{"name":"Universidade de Aveiro, Campus Universit\u00e1rio de Santiago, 3810-193 Aveiro, Portugal"},{"name":"Instituto de Telecomunica\u00e7\u00f5es, Campus Universit\u00e1rio de Santiago, 3810-193 Aveiro, Portugal"}]}],"member":"1968","published-online":{"date-parts":[[2020,4,20]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"18391","DOI":"10.1109\/ACCESS.2017.2735988","article-title":"LEO Satellite Constellation for Internet of Things","volume":"5","author":"Qu","year":"2017","journal-title":"IEEE Access"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"822","DOI":"10.1109\/LAWP.2015.2476363","article-title":"Design of a Reconfigurable Miniaturized Microstrip Antenna for Switchable Multiband Systems","volume":"15","author":"Borhani","year":"2016","journal-title":"IEEE Antennas Wirel. Propag. Lett."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"439","DOI":"10.1109\/TAP.2005.863398","article-title":"Pattern and frequency reconfigurable annular slot antenna using pin diodes","volume":"54","author":"Nikolaou","year":"2006","journal-title":"IEEE Trans. Antennas Propag."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"630","DOI":"10.1109\/TAP.2008.916894","article-title":"A novel single-feed circular microstrip antenna with reconfigurable polarization capability","volume":"56","author":"Kim","year":"2008","journal-title":"IEEE Trans. Antennas Propag."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"464","DOI":"10.1109\/TAP.2005.863409","article-title":"Integration of packaged RF MEMS switches with radiation pattern reconfigurable square spiral microstrip antennas","volume":"54","author":"Huff","year":"2006","journal-title":"IEEE Trans. Antennas Propag."},{"key":"ref_6","unstructured":"Parchin, N.O., Al-Yasir, Y., Abdulkhaleq, A.M., Elfergani, I., Rayit, A., Noras, J.M., Rodriguez, J., and Abd-Alhameed, R.A. (2019). Frequency Reconfigurable Antenna Array for MM-wave 5g Mobile Handsets, Springer International Publishing."},{"key":"ref_7","unstructured":"Patriotis, M., Ayoub, F.N., Christodoulou, C.G., and Jayaweera, S. (April, January 31). A K\/Ka Band Frequency Reconfigurable Transmit\/Receive Antenna Array. Proceedings of the 13th European Conference Antennas Propagation (EuCAP), Krakow, Poland."},{"key":"ref_8","doi-asserted-by":"crossref","unstructured":"Abbas, M., Sikandri, B., Bibi, S., Adil, M., Khan, M.S., Shahjehan, W., and Shereen, M.K. (2018, January 1\u20132). Millimeter Wave Frequency Reconfigurable Antenna for 5G WLAN. Proceedings of the 2018 IEEE 21st International Multi-Topic Conference (INMIC), Karachi, Pakistan.","DOI":"10.1109\/INMIC.2018.8595501"},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"765","DOI":"10.1109\/LMWC.2016.2601298","article-title":"Novel Printed Filtenna with Dual Notches and Good Out-of-Band Characteristics for UWB-MIMO Applications","volume":"26","author":"Li","year":"2016","journal-title":"IEEE Microw. Wirel. Components Lett."},{"key":"ref_10","doi-asserted-by":"crossref","unstructured":"Bano, M., and Rastogi, A.K. (2015). Design and Analysis of Microstrip Filtenna with Discontinuity Compensation Techniques. Int. J. Eng. Res. Technol., 4.","DOI":"10.17577\/IJERTV4IS110383"},{"key":"ref_11","unstructured":"Balanis, C.A. (1996). Antenna Theory Analysis and Design, John Wiley & Sons."},{"key":"ref_12","doi-asserted-by":"crossref","unstructured":"Gon\u00e7alves, R., Pinho, P., and Carvalho, N.B. (2012). Compact, frequency reconfigurable, printed monopole antenna. Int. J. Antennas Propag.","DOI":"10.1155\/2012\/602780"},{"key":"ref_13","unstructured":"Pozar, D.M. (1998). Microwave Engineering, John Wiley & Sons. [2nd ed.]."},{"key":"ref_14","unstructured":"Knowles Precision Devices (2020, April 18). Microstrip Filter Topologies Whitepaper (WP18TF03). Available online: https:\/\/info.knowlescapacitors.com\/microstrip-filter-topology."},{"key":"ref_15","unstructured":"(2020, February 17). PIN Diode MA4PBL027 MACOM. Available online: https:\/\/cdn.macom.com\/datasheets\/MA4PBL027.pdf."}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/20\/8\/2333\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,13]],"date-time":"2025-10-13T13:31:34Z","timestamp":1760362294000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/20\/8\/2333"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2020,4,20]]},"references-count":15,"journal-issue":{"issue":"8","published-online":{"date-parts":[[2020,4]]}},"alternative-id":["s20082333"],"URL":"https:\/\/doi.org\/10.3390\/s20082333","relation":{},"ISSN":["1424-8220"],"issn-type":[{"type":"electronic","value":"1424-8220"}],"subject":[],"published":{"date-parts":[[2020,4,20]]}}}