{"id":269,"date":"2020-04-23T15:34:45","date_gmt":"2020-04-23T13:34:45","guid":{"rendered":"http:\/\/blog.tomasbrincil.cz\/?p=269"},"modified":"2021-01-11T09:10:47","modified_gmt":"2021-01-11T08:10:47","slug":"3d-printable-replica-of-satcom-milsat-antenna-av-2040","status":"publish","type":"post","link":"https:\/\/blog.tomasbrincil.cz\/?p=269","title":{"rendered":"3D printable replica of SATCOM \/ MILSAT antenna AV 2040"},"content":{"rendered":"\n<p>In spring 2019 I was asked to build an antenna which should be similar to equipment which is used by US Army and what more it should work.<\/p>\n\n\n\n<p>After some research through sources of US military contracts and pictures there was a hot candidate for MILSAT or SATCOM antenna build: AV 2040 UHF Satellite Communication (SATCOM) Antenna from ULTRALife corporation [1]<\/p>\n\n\n\n<p>There are STL [2] and OBJ [3] files for anyone who would like to print own atenna. The design is for 449,550 MHz but by adjusting lengths of active parts of the antenna it can be tunder in wide range, see below on Fig. 5<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img decoding=\"async\" src=\"http:\/\/blog.tomasbrincil.cz\/wp-content\/uploads\/2020\/02\/IMG_3714-1024x768.jpeg\" alt=\"\" class=\"wp-image-275\" width=\"600\" srcset=\"https:\/\/blog.tomasbrincil.cz\/wp-content\/uploads\/2020\/02\/IMG_3714-1024x768.jpeg 1024w, https:\/\/blog.tomasbrincil.cz\/wp-content\/uploads\/2020\/02\/IMG_3714-300x225.jpeg 300w, https:\/\/blog.tomasbrincil.cz\/wp-content\/uploads\/2020\/02\/IMG_3714-768x576.jpeg 768w, https:\/\/blog.tomasbrincil.cz\/wp-content\/uploads\/2020\/02\/IMG_3714-1536x1152.jpeg 1536w, https:\/\/blog.tomasbrincil.cz\/wp-content\/uploads\/2020\/02\/IMG_3714-1200x900.jpeg 1200w, https:\/\/blog.tomasbrincil.cz\/wp-content\/uploads\/2020\/02\/IMG_3714.jpeg 2048w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption>Fig.1 &#8211; First design in Tinkercad.com<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img decoding=\"async\" src=\"http:\/\/blog.tomasbrincil.cz\/wp-content\/uploads\/2020\/02\/IMG_3742-1024x768.jpeg\" alt=\"\" class=\"wp-image-271\" width=\"600\" srcset=\"https:\/\/blog.tomasbrincil.cz\/wp-content\/uploads\/2020\/02\/IMG_3742-1024x768.jpeg 1024w, https:\/\/blog.tomasbrincil.cz\/wp-content\/uploads\/2020\/02\/IMG_3742-300x225.jpeg 300w, https:\/\/blog.tomasbrincil.cz\/wp-content\/uploads\/2020\/02\/IMG_3742-768x576.jpeg 768w, https:\/\/blog.tomasbrincil.cz\/wp-content\/uploads\/2020\/02\/IMG_3742-1536x1152.jpeg 1536w, https:\/\/blog.tomasbrincil.cz\/wp-content\/uploads\/2020\/02\/IMG_3742-1200x900.jpeg 1200w, https:\/\/blog.tomasbrincil.cz\/wp-content\/uploads\/2020\/02\/IMG_3742.jpeg 2048w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption>Fig.2 &#8211; Detail of RG58 coax cable prepared for soldering SMA connector<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img decoding=\"async\" src=\"http:\/\/blog.tomasbrincil.cz\/wp-content\/uploads\/2020\/02\/IMG_3743-1024x768.jpeg\" alt=\"\" class=\"wp-image-272\" width=\"600\" srcset=\"https:\/\/blog.tomasbrincil.cz\/wp-content\/uploads\/2020\/02\/IMG_3743-1024x768.jpeg 1024w, https:\/\/blog.tomasbrincil.cz\/wp-content\/uploads\/2020\/02\/IMG_3743-300x225.jpeg 300w, https:\/\/blog.tomasbrincil.cz\/wp-content\/uploads\/2020\/02\/IMG_3743-768x576.jpeg 768w, https:\/\/blog.tomasbrincil.cz\/wp-content\/uploads\/2020\/02\/IMG_3743-1536x1152.jpeg 1536w, https:\/\/blog.tomasbrincil.cz\/wp-content\/uploads\/2020\/02\/IMG_3743-1200x900.jpeg 1200w, https:\/\/blog.tomasbrincil.cz\/wp-content\/uploads\/2020\/02\/IMG_3743.jpeg 2048w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption>Fig. 3 &#8211; <em>Detail of SMA connector<\/em><\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img decoding=\"async\" src=\"http:\/\/blog.tomasbrincil.cz\/wp-content\/uploads\/2020\/02\/8287D378-451F-4F75-8AEE-6D904EB442E8-19962-00000C2447007362-1024x292.png\" alt=\"\" class=\"wp-image-276\" width=\"600\" srcset=\"https:\/\/blog.tomasbrincil.cz\/wp-content\/uploads\/2020\/02\/8287D378-451F-4F75-8AEE-6D904EB442E8-19962-00000C2447007362-1024x292.png 1024w, https:\/\/blog.tomasbrincil.cz\/wp-content\/uploads\/2020\/02\/8287D378-451F-4F75-8AEE-6D904EB442E8-19962-00000C2447007362-300x86.png 300w, https:\/\/blog.tomasbrincil.cz\/wp-content\/uploads\/2020\/02\/8287D378-451F-4F75-8AEE-6D904EB442E8-19962-00000C2447007362-768x219.png 768w, https:\/\/blog.tomasbrincil.cz\/wp-content\/uploads\/2020\/02\/8287D378-451F-4F75-8AEE-6D904EB442E8-19962-00000C2447007362-1536x438.png 1536w, https:\/\/blog.tomasbrincil.cz\/wp-content\/uploads\/2020\/02\/8287D378-451F-4F75-8AEE-6D904EB442E8-19962-00000C2447007362-1200x342.png 1200w, https:\/\/blog.tomasbrincil.cz\/wp-content\/uploads\/2020\/02\/8287D378-451F-4F75-8AEE-6D904EB442E8-19962-00000C2447007362.png 1687w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption>Fig. 4 &#8211; SWR (Standing Wave Ratio) of antenna<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img decoding=\"async\" src=\"http:\/\/blog.tomasbrincil.cz\/wp-content\/uploads\/2020\/04\/satcom-howitworks.jpg\" alt=\"\" class=\"wp-image-298\" width=\"600\" srcset=\"https:\/\/blog.tomasbrincil.cz\/wp-content\/uploads\/2020\/04\/satcom-howitworks.jpg 900w, https:\/\/blog.tomasbrincil.cz\/wp-content\/uploads\/2020\/04\/satcom-howitworks-300x238.jpg 300w, https:\/\/blog.tomasbrincil.cz\/wp-content\/uploads\/2020\/04\/satcom-howitworks-768x608.jpg 768w\" sizes=\"(max-width: 900px) 100vw, 900px\" \/><figcaption>Fig. 5 &#8211; The antenna lengths<\/figcaption><\/figure>\n\n\n\n<p>There are three formulas considering f as frequency in Hz need to be calculated to get three dimensions which are mandatory for best results:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>red = (299792458 \/ f \/ 2) * 0.92 &#91;meters]\nblue = red * 1.05 &#91;meters]\ngreen = 299792458 \/ f * 0.225 &#91;meters]<\/code><\/pre>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img decoding=\"async\" src=\"http:\/\/blog.tomasbrincil.cz\/wp-content\/uploads\/2020\/02\/IMG_3744-1024x768.jpeg\" alt=\"\" class=\"wp-image-270\" width=\"600\" srcset=\"https:\/\/blog.tomasbrincil.cz\/wp-content\/uploads\/2020\/02\/IMG_3744-1024x768.jpeg 1024w, https:\/\/blog.tomasbrincil.cz\/wp-content\/uploads\/2020\/02\/IMG_3744-300x225.jpeg 300w, https:\/\/blog.tomasbrincil.cz\/wp-content\/uploads\/2020\/02\/IMG_3744-768x576.jpeg 768w, https:\/\/blog.tomasbrincil.cz\/wp-content\/uploads\/2020\/02\/IMG_3744-1536x1152.jpeg 1536w, https:\/\/blog.tomasbrincil.cz\/wp-content\/uploads\/2020\/02\/IMG_3744-1200x900.jpeg 1200w, https:\/\/blog.tomasbrincil.cz\/wp-content\/uploads\/2020\/02\/IMG_3744.jpeg 2048w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption>Fig. 6 &#8211; First bunch of antennas<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img decoding=\"async\" src=\"http:\/\/blog.tomasbrincil.cz\/wp-content\/uploads\/2020\/02\/IMG_3723-1024x768.jpeg\" alt=\"\" class=\"wp-image-274\" width=\"600\" srcset=\"https:\/\/blog.tomasbrincil.cz\/wp-content\/uploads\/2020\/02\/IMG_3723-1024x768.jpeg 1024w, https:\/\/blog.tomasbrincil.cz\/wp-content\/uploads\/2020\/02\/IMG_3723-300x225.jpeg 300w, https:\/\/blog.tomasbrincil.cz\/wp-content\/uploads\/2020\/02\/IMG_3723-768x576.jpeg 768w, https:\/\/blog.tomasbrincil.cz\/wp-content\/uploads\/2020\/02\/IMG_3723-1536x1152.jpeg 1536w, https:\/\/blog.tomasbrincil.cz\/wp-content\/uploads\/2020\/02\/IMG_3723-1200x900.jpeg 1200w, https:\/\/blog.tomasbrincil.cz\/wp-content\/uploads\/2020\/02\/IMG_3723.jpeg 2048w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption>Fig. 7 &#8211; Picture from outdoor testing<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"satcom 1\" width=\"474\" height=\"267\" src=\"https:\/\/www.youtube.com\/embed\/5w-YCKkB7Ew?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><figcaption>Fig. 8- Making of the antenna and QSO on 102 km<\/figcaption><\/figure>\n\n\n\n<div class=\"wp-block-file\"><a href=\"http:\/\/blog.tomasbrincil.cz\/wp-content\/uploads\/2020\/04\/TDS_AV2040.pdf\" target=\"_blank\" rel=\"noreferrer noopener\">[1] TDS_AV2040.pdf<\/a><a href=\"http:\/\/blog.tomasbrincil.cz\/wp-content\/uploads\/2020\/04\/TDS_AV2040.pdf\" class=\"wp-block-file__button\" download>Download<\/a><\/div>\n\n\n\n<div class=\"wp-block-file\"><a href=\"http:\/\/blog.tomasbrincil.cz\/wp-content\/uploads\/2020\/04\/OK1BT_wannabe_milsat_satcom.stl\" target=\"_blank\" rel=\"noreferrer noopener\">[2] OK1BT_wannabe_milsat_satcom.stl<\/a><a href=\"http:\/\/blog.tomasbrincil.cz\/wp-content\/uploads\/2020\/04\/OK1BT_wannabe_milsat_satcom.stl\" class=\"wp-block-file__button\" download>Download<\/a><\/div>\n\n\n\n<div class=\"wp-block-file\"><a href=\"http:\/\/blog.tomasbrincil.cz\/wp-content\/uploads\/2020\/04\/OK1BT_wannabe_milsat_satcom.zip\" target=\"_blank\" rel=\"noreferrer noopener\">[3] OK1BT_wannabe_milsat_satcom.zip<\/a><a href=\"http:\/\/blog.tomasbrincil.cz\/wp-content\/uploads\/2020\/04\/OK1BT_wannabe_milsat_satcom.zip\" class=\"wp-block-file__button\" download>Download<\/a><\/div>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>In spring 2019 I was asked to build an antenna which should be similar to equipment which is used by US Army and what more it should work. After some research through sources of US military contracts and pictures there was a hot candidate for MILSAT or SATCOM antenna build: AV 2040 UHF Satellite Communication &hellip; <a href=\"https:\/\/blog.tomasbrincil.cz\/?p=269\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">3D printable replica of SATCOM \/ MILSAT antenna AV 2040<\/span> <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-269","post","type-post","status-publish","format-standard","hentry","category-blog"],"_links":{"self":[{"href":"https:\/\/blog.tomasbrincil.cz\/index.php?rest_route=\/wp\/v2\/posts\/269","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.tomasbrincil.cz\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.tomasbrincil.cz\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.tomasbrincil.cz\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.tomasbrincil.cz\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=269"}],"version-history":[{"count":6,"href":"https:\/\/blog.tomasbrincil.cz\/index.php?rest_route=\/wp\/v2\/posts\/269\/revisions"}],"predecessor-version":[{"id":348,"href":"https:\/\/blog.tomasbrincil.cz\/index.php?rest_route=\/wp\/v2\/posts\/269\/revisions\/348"}],"wp:attachment":[{"href":"https:\/\/blog.tomasbrincil.cz\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=269"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.tomasbrincil.cz\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=269"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.tomasbrincil.cz\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=269"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}