{"id":606,"date":"2019-09-26T13:30:47","date_gmt":"2019-09-26T11:30:47","guid":{"rendered":"https:\/\/project.inria.fr\/m5hstia\/?page_id=606"},"modified":"2019-09-26T15:37:52","modified_gmt":"2019-09-26T13:37:52","slug":"wide-scan-angle-transmit-array-antenna","status":"publish","type":"page","link":"https:\/\/project.inria.fr\/m5hstia\/results\/wp2\/wide-scan-angle-transmit-array-antenna\/","title":{"rendered":"Wide scan angle transmit array antenna"},"content":{"rendered":"<p>The role of the Transmitarray Antenna (TA) is to focus the radiation energy in one direction by transforming a spherical wave into a plane wave. It\u2019s composed of unit-cells allowing controlling the phase shift of the electromagnetic wave (Figure 1).<\/p>\n<p>The phase shift distribution is optimized by using discrete phase shift value. To obtain good performance, 8 values (each 45\u00b0) has been chosen.<\/p>\n<p>The Figure 2 shows the phase shift distribution obtained in the case of an unifocal transmitarray.<\/p>\n<ul>\n<li>TA with 20\u00d720 unit-cells (50\u00d750 mm<sup>2<\/sup>)<\/li>\n<li>Ratio F\/D = 0.4 (edge tapering -11 dB)<\/li>\n<\/ul>\n<table>\n<tbody>\n<tr>\n<td>\n<p><div id=\"attachment_637\" style=\"width: 287px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-637\" class=\"wp-image-637\" style=\"float: left;\" src=\"https:\/\/project.inria.fr\/m5hstia\/files\/2019\/09\/1-300x133.png\" alt=\"\" width=\"277\" height=\"123\" srcset=\"https:\/\/project.inria.fr\/m5hstia\/files\/2019\/09\/1-300x133.png 300w, https:\/\/project.inria.fr\/m5hstia\/files\/2019\/09\/1-150x66.png 150w, https:\/\/project.inria.fr\/m5hstia\/files\/2019\/09\/1.png 446w\" sizes=\"auto, (max-width: 277px) 100vw, 277px\" \/><p id=\"caption-attachment-637\" class=\"wp-caption-text\">Figure 1: Schematic diagram<\/p><\/div><\/td>\n<td>\n<p><div id=\"attachment_637\" style=\"width: 239px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-637\" class=\"wp-image-637\" style=\"float: right;\" src=\"https:\/\/project.inria.fr\/m5hstia\/files\/2019\/09\/2.png\" alt=\"\" width=\"229\" height=\"195\" \/><p id=\"caption-attachment-637\" class=\"wp-caption-text\">Figure 2 : Phase shift distribution<\/p><\/div><\/td>\n<td>\n<p><div id=\"attachment_623\" style=\"width: 263px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/project.inria.fr\/m5hstia\/files\/2019\/09\/2_C-1.png\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-623\" class=\"wp-image-623 \" src=\"https:\/\/project.inria.fr\/m5hstia\/files\/2019\/09\/2_C-1-300x134.png\" alt=\"\" width=\"253\" height=\"113\" srcset=\"https:\/\/project.inria.fr\/m5hstia\/files\/2019\/09\/2_C-1-300x134.png 300w, https:\/\/project.inria.fr\/m5hstia\/files\/2019\/09\/2_C-1-150x67.png 150w, https:\/\/project.inria.fr\/m5hstia\/files\/2019\/09\/2_C-1.png 632w\" sizes=\"auto, (max-width: 253px) 100vw, 253px\" \/><\/a><p id=\"caption-attachment-623\" class=\"wp-caption-text\">Figure 3: radiation pattern test bench<\/p><\/div><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>The transmitarray antenna has been tested and validated from radiation pattern measurement. The primary source is the 2X2 patch array presented in <strong>M5HESTIA 60GHz-FI downconverter <\/strong>part.<\/p>\n<div id=\"attachment_694\" style=\"width: 641px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/project.inria.fr\/m5hstia\/files\/2019\/09\/Capture-d\u2019e\u0301cran-2019-09-26-a\u0300-15.32.53.png\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-694\" class=\"wp-image-694 \" src=\"https:\/\/project.inria.fr\/m5hstia\/files\/2019\/09\/Capture-d\u2019e\u0301cran-2019-09-26-a\u0300-15.32.53-300x90.png\" alt=\"\" width=\"631\" height=\"189\" srcset=\"https:\/\/project.inria.fr\/m5hstia\/files\/2019\/09\/Capture-d\u2019e\u0301cran-2019-09-26-a\u0300-15.32.53-300x90.png 300w, https:\/\/project.inria.fr\/m5hstia\/files\/2019\/09\/Capture-d\u2019e\u0301cran-2019-09-26-a\u0300-15.32.53-768x230.png 768w, https:\/\/project.inria.fr\/m5hstia\/files\/2019\/09\/Capture-d\u2019e\u0301cran-2019-09-26-a\u0300-15.32.53-150x45.png 150w, https:\/\/project.inria.fr\/m5hstia\/files\/2019\/09\/Capture-d\u2019e\u0301cran-2019-09-26-a\u0300-15.32.53.png 902w\" sizes=\"auto, (max-width: 631px) 100vw, 631px\" \/><\/a><p id=\"caption-attachment-694\" class=\"wp-caption-text\">Figure 4: Radiation antenna measurements<\/p><\/div>\n<ul>\n<li>Side lobe level (SLL) is &lt; -16\/-18 dB (E-\/H-plane)<\/li>\n<li>Cross polarization is &lt; -30\/-28 dB (E-\/H-plane)<\/li>\n<li>Full half power bandwidth is 8\u00b0 in E-&amp;H-plane<\/li>\n<\/ul>\n<p>The beam scanning is obtained by moving the primary source.<\/p>\n<div id=\"attachment_641\" style=\"width: 353px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/project.inria.fr\/m5hstia\/files\/2019\/09\/3.png\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-641\" class=\"wp-image-641 \" src=\"https:\/\/project.inria.fr\/m5hstia\/files\/2019\/09\/3-300x127.png\" alt=\"\" width=\"343\" height=\"145\" srcset=\"https:\/\/project.inria.fr\/m5hstia\/files\/2019\/09\/3-300x127.png 300w, https:\/\/project.inria.fr\/m5hstia\/files\/2019\/09\/3-150x63.png 150w, https:\/\/project.inria.fr\/m5hstia\/files\/2019\/09\/3.png 530w\" sizes=\"auto, (max-width: 343px) 100vw, 343px\" \/><\/a><p id=\"caption-attachment-641\" class=\"wp-caption-text\">Figure 5: schematic diagram of the beam scanning<\/p><\/div>\n<table>\n<tbody>\n<tr>\n<td>\n<p><div id=\"attachment_642\" style=\"width: 464px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/project.inria.fr\/m5hstia\/files\/2019\/09\/Capture-d\u2019e\u0301cran-2019-09-26-a\u0300-14.17.32.png\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-642\" class=\"wp-image-642 \" src=\"https:\/\/project.inria.fr\/m5hstia\/files\/2019\/09\/Capture-d\u2019e\u0301cran-2019-09-26-a\u0300-14.17.32-300x125.png\" alt=\"\" width=\"454\" height=\"189\" srcset=\"https:\/\/project.inria.fr\/m5hstia\/files\/2019\/09\/Capture-d\u2019e\u0301cran-2019-09-26-a\u0300-14.17.32-300x125.png 300w, https:\/\/project.inria.fr\/m5hstia\/files\/2019\/09\/Capture-d\u2019e\u0301cran-2019-09-26-a\u0300-14.17.32-768x321.png 768w, https:\/\/project.inria.fr\/m5hstia\/files\/2019\/09\/Capture-d\u2019e\u0301cran-2019-09-26-a\u0300-14.17.32-150x63.png 150w, https:\/\/project.inria.fr\/m5hstia\/files\/2019\/09\/Capture-d\u2019e\u0301cran-2019-09-26-a\u0300-14.17.32.png 900w\" sizes=\"auto, (max-width: 454px) 100vw, 454px\" \/><\/a><p id=\"caption-attachment-642\" class=\"wp-caption-text\">Figure 6: Radiation pattern of the unifocal TA in H-plane at 60 GHz<\/p><\/div><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>The Radiation pattern of the unifocal TA in H-plane at 60 GHz is presented on Figure 6. Unifocal means that the phase error in the aperture is minimum for one primary source position (usually at the centre corresponding to a 0\u00b0 beam direction).<\/p>\n<p>To improve the beam scanning performance, the principle is to design a multi-focal transmitarray antenna. Usually two symmetric primary source position are defined where the phase error will be minimized (figure). In our case, the focal position corresponds to a 33\u00b0 beam direction.<\/p>\n<div id=\"attachment_683\" style=\"width: 310px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/project.inria.fr\/m5hstia\/files\/2019\/09\/4.png\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-683\" class=\"wp-image-683 size-medium\" src=\"https:\/\/project.inria.fr\/m5hstia\/files\/2019\/09\/4-300x142.png\" alt=\"\" width=\"300\" height=\"142\" srcset=\"https:\/\/project.inria.fr\/m5hstia\/files\/2019\/09\/4-300x142.png 300w, https:\/\/project.inria.fr\/m5hstia\/files\/2019\/09\/4-150x71.png 150w, https:\/\/project.inria.fr\/m5hstia\/files\/2019\/09\/4.png 483w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><p id=\"caption-attachment-683\" class=\"wp-caption-text\">Figure 7: Schematic diagram of a bifocal TA<\/p><\/div>\n<div id=\"attachment_684\" style=\"width: 507px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/project.inria.fr\/m5hstia\/files\/2019\/09\/Capture-d\u2019e\u0301cran-2019-09-26-a\u0300-15.22.08.png\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-684\" class=\"wp-image-684\" src=\"https:\/\/project.inria.fr\/m5hstia\/files\/2019\/09\/Capture-d\u2019e\u0301cran-2019-09-26-a\u0300-15.22.08-300x122.png\" alt=\"\" width=\"497\" height=\"202\" srcset=\"https:\/\/project.inria.fr\/m5hstia\/files\/2019\/09\/Capture-d\u2019e\u0301cran-2019-09-26-a\u0300-15.22.08-300x122.png 300w, https:\/\/project.inria.fr\/m5hstia\/files\/2019\/09\/Capture-d\u2019e\u0301cran-2019-09-26-a\u0300-15.22.08-768x313.png 768w, https:\/\/project.inria.fr\/m5hstia\/files\/2019\/09\/Capture-d\u2019e\u0301cran-2019-09-26-a\u0300-15.22.08-150x61.png 150w, https:\/\/project.inria.fr\/m5hstia\/files\/2019\/09\/Capture-d\u2019e\u0301cran-2019-09-26-a\u0300-15.22.08.png 893w\" sizes=\"auto, (max-width: 497px) 100vw, 497px\" \/><\/a><p id=\"caption-attachment-684\" class=\"wp-caption-text\">Figure 7: radiation pattern of the bifocal TA antenna in H-plane at 60 GHz<\/p><\/div>\n<p>The scan loss is 2.9 dB at \u00b140\u00b0 and the gain is around 20dBi.<\/p>\n<div id=\"attachment_686\" style=\"width: 561px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/project.inria.fr\/m5hstia\/files\/2019\/09\/Capture-d\u2019e\u0301cran-2019-09-26-a\u0300-15.24.18.png\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-686\" class=\"wp-image-686\" src=\"https:\/\/project.inria.fr\/m5hstia\/files\/2019\/09\/Capture-d\u2019e\u0301cran-2019-09-26-a\u0300-15.24.18-300x92.png\" alt=\"\" width=\"551\" height=\"169\" srcset=\"https:\/\/project.inria.fr\/m5hstia\/files\/2019\/09\/Capture-d\u2019e\u0301cran-2019-09-26-a\u0300-15.24.18-300x92.png 300w, https:\/\/project.inria.fr\/m5hstia\/files\/2019\/09\/Capture-d\u2019e\u0301cran-2019-09-26-a\u0300-15.24.18-768x236.png 768w, https:\/\/project.inria.fr\/m5hstia\/files\/2019\/09\/Capture-d\u2019e\u0301cran-2019-09-26-a\u0300-15.24.18-150x46.png 150w, https:\/\/project.inria.fr\/m5hstia\/files\/2019\/09\/Capture-d\u2019e\u0301cran-2019-09-26-a\u0300-15.24.18.png 908w\" sizes=\"auto, (max-width: 551px) 100vw, 551px\" \/><\/a><p id=\"caption-attachment-686\" class=\"wp-caption-text\">Figure 8: Gain antenna and comparison of the scan losses for unifocal and bifocal TA<\/p><\/div>\n<p>In the case of a scan in both plane (azimuthal and elevation), it\u2019s possible to design a quadrifocal TA (figure 9).<\/p>\n<div id=\"attachment_688\" style=\"width: 310px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/project.inria.fr\/m5hstia\/files\/2019\/09\/5.png\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-688\" class=\"wp-image-688 size-medium\" src=\"https:\/\/project.inria.fr\/m5hstia\/files\/2019\/09\/5-300x259.png\" alt=\"\" width=\"300\" height=\"259\" srcset=\"https:\/\/project.inria.fr\/m5hstia\/files\/2019\/09\/5-300x259.png 300w, https:\/\/project.inria.fr\/m5hstia\/files\/2019\/09\/5-150x130.png 150w, https:\/\/project.inria.fr\/m5hstia\/files\/2019\/09\/5.png 330w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><p id=\"caption-attachment-688\" class=\"wp-caption-text\">Figure 9: a quadrifocal TA<\/p><\/div>\n<div id=\"attachment_687\" style=\"width: 495px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/project.inria.fr\/m5hstia\/files\/2019\/09\/Capture-d\u2019e\u0301cran-2019-09-26-a\u0300-15.26.43.png\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-687\" class=\"wp-image-687\" src=\"https:\/\/project.inria.fr\/m5hstia\/files\/2019\/09\/Capture-d\u2019e\u0301cran-2019-09-26-a\u0300-15.26.43-300x112.png\" alt=\"\" width=\"485\" height=\"181\" srcset=\"https:\/\/project.inria.fr\/m5hstia\/files\/2019\/09\/Capture-d\u2019e\u0301cran-2019-09-26-a\u0300-15.26.43-300x112.png 300w, https:\/\/project.inria.fr\/m5hstia\/files\/2019\/09\/Capture-d\u2019e\u0301cran-2019-09-26-a\u0300-15.26.43-768x288.png 768w, https:\/\/project.inria.fr\/m5hstia\/files\/2019\/09\/Capture-d\u2019e\u0301cran-2019-09-26-a\u0300-15.26.43-150x56.png 150w, https:\/\/project.inria.fr\/m5hstia\/files\/2019\/09\/Capture-d\u2019e\u0301cran-2019-09-26-a\u0300-15.26.43.png 899w\" sizes=\"auto, (max-width: 485px) 100vw, 485px\" \/><\/a><p id=\"caption-attachment-687\" class=\"wp-caption-text\">Figure 10: Comparison simulation- measurement of the radiation pattern of the quadrifocal TA<\/p><\/div>\n<div id=\"attachment_690\" style=\"width: 482px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/project.inria.fr\/m5hstia\/files\/2019\/09\/Capture-d\u2019e\u0301cran-2019-09-26-a\u0300-15.28.45.png\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-690\" class=\"wp-image-690 \" src=\"https:\/\/project.inria.fr\/m5hstia\/files\/2019\/09\/Capture-d\u2019e\u0301cran-2019-09-26-a\u0300-15.28.45-300x119.png\" alt=\"\" width=\"472\" height=\"187\" srcset=\"https:\/\/project.inria.fr\/m5hstia\/files\/2019\/09\/Capture-d\u2019e\u0301cran-2019-09-26-a\u0300-15.28.45-300x119.png 300w, https:\/\/project.inria.fr\/m5hstia\/files\/2019\/09\/Capture-d\u2019e\u0301cran-2019-09-26-a\u0300-15.28.45-768x305.png 768w, https:\/\/project.inria.fr\/m5hstia\/files\/2019\/09\/Capture-d\u2019e\u0301cran-2019-09-26-a\u0300-15.28.45-150x60.png 150w, https:\/\/project.inria.fr\/m5hstia\/files\/2019\/09\/Capture-d\u2019e\u0301cran-2019-09-26-a\u0300-15.28.45.png 896w\" sizes=\"auto, (max-width: 472px) 100vw, 472px\" \/><\/a><p id=\"caption-attachment-690\" class=\"wp-caption-text\">Figure 11: Measurement of the radiation pattern of the quadrifocal TA<\/p><\/div>\n<p><a href=\"https:\/\/project.inria.fr\/m5hstia\/files\/2019\/09\/Capture-d\u2019e\u0301cran-2019-09-26-a\u0300-15.28.55.png\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-691 aligncenter\" src=\"https:\/\/project.inria.fr\/m5hstia\/files\/2019\/09\/Capture-d\u2019e\u0301cran-2019-09-26-a\u0300-15.28.55-300x170.png\" alt=\"\" width=\"524\" height=\"297\" srcset=\"https:\/\/project.inria.fr\/m5hstia\/files\/2019\/09\/Capture-d\u2019e\u0301cran-2019-09-26-a\u0300-15.28.55-300x170.png 300w, https:\/\/project.inria.fr\/m5hstia\/files\/2019\/09\/Capture-d\u2019e\u0301cran-2019-09-26-a\u0300-15.28.55-768x434.png 768w, https:\/\/project.inria.fr\/m5hstia\/files\/2019\/09\/Capture-d\u2019e\u0301cran-2019-09-26-a\u0300-15.28.55-150x85.png 150w, https:\/\/project.inria.fr\/m5hstia\/files\/2019\/09\/Capture-d\u2019e\u0301cran-2019-09-26-a\u0300-15.28.55.png 824w\" sizes=\"auto, (max-width: 524px) 100vw, 524px\" \/><\/a><br \/>\nThe angular range with scan losses below 2dB are respectively of 40\u00b0 for the unifocal TA and 60\u00b0 for the quadrifocal TA.<\/p>","protected":false},"excerpt":{"rendered":"<p>The role of the Transmitarray Antenna (TA) is to focus the radiation energy in one direction by transforming a spherical wave into a plane wave.\u2026<\/p>\n<p> <a class=\"continue-reading-link\" href=\"https:\/\/project.inria.fr\/m5hstia\/results\/wp2\/wide-scan-angle-transmit-array-antenna\/\"><span>Continue reading<\/span><i class=\"crycon-right-dir\"><\/i><\/a> <\/p>\n","protected":false},"author":1653,"featured_media":0,"parent":85,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":"","_members_access_role":[],"_members_access_error":""},"class_list":["post-606","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/project.inria.fr\/m5hstia\/wp-json\/wp\/v2\/pages\/606","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/project.inria.fr\/m5hstia\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/project.inria.fr\/m5hstia\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/project.inria.fr\/m5hstia\/wp-json\/wp\/v2\/users\/1653"}],"replies":[{"embeddable":true,"href":"https:\/\/project.inria.fr\/m5hstia\/wp-json\/wp\/v2\/comments?post=606"}],"version-history":[{"count":70,"href":"https:\/\/project.inria.fr\/m5hstia\/wp-json\/wp\/v2\/pages\/606\/revisions"}],"predecessor-version":[{"id":699,"href":"https:\/\/project.inria.fr\/m5hstia\/wp-json\/wp\/v2\/pages\/606\/revisions\/699"}],"up":[{"embeddable":true,"href":"https:\/\/project.inria.fr\/m5hstia\/wp-json\/wp\/v2\/pages\/85"}],"wp:attachment":[{"href":"https:\/\/project.inria.fr\/m5hstia\/wp-json\/wp\/v2\/media?parent=606"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}