{"id":43352,"date":"2020-11-18T11:06:22","date_gmt":"2020-11-18T09:06:22","guid":{"rendered":"https:\/\/www.iemn.fr\/articles-temporaires-anglais\/brevet-2.html"},"modified":"2020-11-24T17:27:06","modified_gmt":"2020-11-24T15:27:06","slug":"brevet-2","status":"publish","type":"post","link":"https:\/\/www.iemn.fr\/en\/newsletter\/brevet-2.html","title":{"rendered":"Frequency-adjustable surface acoustic wave device"},"content":{"rendered":"<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-13nfo5f-1769d5536c6735472374724890eab630\">\n.flex_column.av-13nfo5f-1769d5536c6735472374724890eab630{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-13nfo5f-1769d5536c6735472374724890eab630 av_one_full  avia-builder-el-0  el_before_av_one_fifth  avia-builder-el-first  first flex_column_div av-zero-column-padding'     ><section  class='av_textblock_section av-m5ahhf-f940023686974a8b41c96cea72b0edb9'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><h3 style=\"text-align: center;\">Frequency-adjustable surface acoustic wave device<\/h3>\n<hr \/>\n<p>In telecommunications, a large number of Radio Frequency (RF) bands are used to transmit or receive information. Each band defines a channel for which filtering functions are necessary to restore the information.<br \/>\nPassive surface acoustic wave (SAW) passive frequency filters play a crucial role in radio frequency telecommunication systems. However, these devices do not allow a voltage-controlled adjustment of their working frequency or bandwidth.<\/p>\n<\/div><\/section><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-1imnyqr-1eb622bf1fea0728fec46450a766a89a\">\n.flex_column.av-1imnyqr-1eb622bf1fea0728fec46450a766a89a{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-1imnyqr-1eb622bf1fea0728fec46450a766a89a av_one_fifth  avia-builder-el-2  el_after_av_one_full  el_before_av_four_fifth  first flex_column_div av-zero-column-padding  column-top-margin'     ><style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-khn7bjdr-e1df4b4684ee3d1cf031f7b6889185a2\">\n.av_font_icon.av-khn7bjdr-e1df4b4684ee3d1cf031f7b6889185a2{\ncolor:#b02b2c;\nborder-color:#b02b2c;\n}\n.av_font_icon.av-khn7bjdr-e1df4b4684ee3d1cf031f7b6889185a2 .av-icon-char{\nfont-size:40px;\nline-height:40px;\n}\n<\/style>\n<span  class='av_font_icon av-khn7bjdr-e1df4b4684ee3d1cf031f7b6889185a2 avia_animate_when_visible av-icon-style- avia-icon-pos-right avia-icon-animate'><span class='av-icon-char' aria-hidden='true' data-av_icon='\ue889' data-av_iconfont='entypo-fontello' ><\/span><\/span><\/div><\/p>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-148oug3-5a2dfca6c008779b902cc9fef45d3ce7\">\n.flex_column.av-148oug3-5a2dfca6c008779b902cc9fef45d3ce7{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-148oug3-5a2dfca6c008779b902cc9fef45d3ce7 av_four_fifth  avia-builder-el-4  el_after_av_one_fifth  el_before_av_one_fifth  flex_column_div av-zero-column-padding  column-top-margin'     ><section  class='av_textblock_section av-khn7c1p5-95158721bff39bed81a4ba5a4504bc78'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><blockquote>\n<p><strong>The proposed solution is to modify the electrical conditions within the SAW devices in order to vary their operating frequency, i.e. to make SAW filters frequency agile while preserving the integrity of the filtering function. The modification and control of the operating frequencies of the devices is performed by an external electrical control.<\/strong><br \/>\n<strong>Frequency agility allows to consider only one device to investigate several frequency bands for the same filtering functionality.<\/strong><\/p>\n<\/blockquote>\n<\/div><\/section><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-v4gkn7-0ff107f3a694f99cf3a0f7d928fc5e6b\">\n.flex_column.av-v4gkn7-0ff107f3a694f99cf3a0f7d928fc5e6b{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-v4gkn7-0ff107f3a694f99cf3a0f7d928fc5e6b av_one_fifth  avia-builder-el-6  el_after_av_four_fifth  el_before_av_one_third  first flex_column_div av-zero-column-padding'     ><section  class='av_textblock_section av-khn7khn0-f35c177c9a3c6410f008800d5f0ef78a'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><p><span style=\"color: #ffffff;\">&#8211;<\/span><\/p>\n<\/div><\/section><\/div><\/p>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-4rhrj7-358fce8bae435b5ebb1064a0ac33e792\">\n.flex_column.av-4rhrj7-358fce8bae435b5ebb1064a0ac33e792{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-4rhrj7-358fce8bae435b5ebb1064a0ac33e792 av_one_third  avia-builder-el-8  el_after_av_one_fifth  el_before_av_one_third  flex_column_div av-zero-column-padding'     ><section  class='av_textblock_section av-khn6v3qm-6f0c5ee1f3eb1b480303b70b88fa31f5'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><p><a href=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2020\/11\/croquis_brevet_2.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-43178 aligncenter\" src=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2020\/11\/croquis_brevet_2.jpg\" alt=\"\" width=\"200\" height=\"102\" srcset=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2020\/11\/croquis_brevet_2.jpg 200w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2020\/11\/croquis_brevet_2-16x8.jpg 16w\" sizes=\"auto, (max-width: 200px) 100vw, 200px\" \/><\/a>Schematic diagram: resonator (in red the transducer, in blue the mirrors). The electrodes of the mirrors are classically connected to ground. Here, we propose a connection of the electrodes of the mirrors or to the ground or in open circuit.<\/p>\n<\/div><\/section><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-pb4kcj-a4d7035f9487f734aa985a73aac79f1c\">\n.flex_column.av-pb4kcj-a4d7035f9487f734aa985a73aac79f1c{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-pb4kcj-a4d7035f9487f734aa985a73aac79f1c av_one_third  avia-builder-el-10  el_after_av_one_third  el_before_av_one_fifth  flex_column_div av-zero-column-padding'     ><section  class='av_textblock_section av-khn6vh9d-a477edd0dd86e7d0240e7a3dd0bb3216'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><p style=\"text-align: center;\"><a href=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2020\/11\/croquis_brevet_1.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-medium wp-image-43179\" src=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2020\/11\/croquis_brevet_1-211x300.jpg\" alt=\"\" width=\"211\" height=\"300\" srcset=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2020\/11\/croquis_brevet_1-211x300.jpg 211w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2020\/11\/croquis_brevet_1-8x12.jpg 8w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2020\/11\/croquis_brevet_1.jpg 450w\" sizes=\"auto, (max-width: 211px) 100vw, 211px\" \/><\/a>Result on a resonator with change of connections: all DC (all short circuit = all to ground), then 10 electrodes in CO (open circuit), then 30 in CO then 50 in CO then all in CO: we see the shift of the resonator operating frequency.<\/p>\n<\/div><\/section><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-1gf4gbn-9a282c3490261e4db6fda65b8f5203cf\">\n.flex_column.av-1gf4gbn-9a282c3490261e4db6fda65b8f5203cf{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-1gf4gbn-9a282c3490261e4db6fda65b8f5203cf av_one_fifth  avia-builder-el-12  el_after_av_one_third  el_before_av_one_third  first flex_column_div av-zero-column-padding  column-top-margin'     ><section  class='av_textblock_section av-khn7xehw-5329af102e128fc1dceaa3d6bbfb18e5'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><p><span style=\"color: #ffffff;\">&#8211;<\/span><\/p>\n<\/div><\/section><\/div><\/p>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-14j3xj7-5a6b8fcbe3047b8cf229a9ad79ffc9e8\">\n.flex_column.av-14j3xj7-5a6b8fcbe3047b8cf229a9ad79ffc9e8{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-14j3xj7-5a6b8fcbe3047b8cf229a9ad79ffc9e8 av_one_third  avia-builder-el-14  el_after_av_one_fifth  el_before_av_one_third  flex_column_div av-zero-column-padding  column-top-margin'     ><style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-khn8063n-fd95c738ff5dea948f14bd70cf23252f\">\n.av_font_icon.av-khn8063n-fd95c738ff5dea948f14bd70cf23252f{\ncolor:#b02b2c;\nborder-color:#b02b2c;\n}\n.av_font_icon.av-khn8063n-fd95c738ff5dea948f14bd70cf23252f .av-icon-char{\nfont-size:40px;\nline-height:40px;\n}\n<\/style>\n<span  class='av_font_icon av-khn8063n-fd95c738ff5dea948f14bd70cf23252f avia_animate_when_visible av-icon-style- avia-icon-pos-right avia-icon-animate'><span class='av-icon-char' aria-hidden='true' data-av_icon='\ue826' data-av_iconfont='entypo-fontello' ><\/span><\/span><\/div>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-m296ar-95a0776a49af4a8db69322f720cd4594\">\n.flex_column.av-m296ar-95a0776a49af4a8db69322f720cd4594{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-m296ar-95a0776a49af4a8db69322f720cd4594 av_one_third  avia-builder-el-16  el_after_av_one_third  avia-builder-el-last  flex_column_div av-zero-column-padding  column-top-margin'     ><section  class='av_textblock_section av-khn81f39-2eee0148c8d0538d71b1110073e27b1b'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><h5><strong><span style=\"color: #800000;\"><span style=\"color: #ffffff;\">______________________________________________________________________________________<\/span><br \/>\n<\/span><a href=\"https:\/\/worldwide.espacenet.com\/publicationDetails\/biblio?FT=D&amp;date=20200702&amp;DB=EPODOC&amp;locale=fr_EP&amp;CC=WO&amp;NR=2020136262A1&amp;KC=A1&amp;ND=5\" target=\"_blank\" rel=\"noopener noreferrer\"><span style=\"color: #800000;\">Read more +<\/span><\/a><\/strong><\/h5>\n<\/div><\/section><\/div>","protected":false},"excerpt":{"rendered":"","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[297],"tags":[],"class_list":["post-43352","post","type-post","status-publish","format-standard","hentry","category-newsletter"],"_links":{"self":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts\/43352","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/comments?post=43352"}],"version-history":[{"count":0,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts\/43352\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/media?parent=43352"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/categories?post=43352"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/tags?post=43352"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}