{"id":4456277,"date":"2024-08-06T00:11:06","date_gmt":"2024-08-05T22:11:06","guid":{"rendered":"https:\/\/amsat-dl.org\/helaps\/"},"modified":"2024-08-06T00:14:32","modified_gmt":"2024-08-05T22:14:32","slug":"helaps","status":"publish","type":"page","link":"https:\/\/amsat-dl.org\/en\/helaps\/","title":{"rendered":"HELAPS"},"content":{"rendered":"\n<h1>High Efficiency Linear Amplification via Parametric Synthesis<\/h1>\n\n<p>One of the two linear transponders on board <a href=\"https:\/\/amsat-dl.org\/en\/amsat-oscar-7\/\" data-type=\"page\" data-id=\"2860018\" target=\"_blank\" rel=\"noreferrer noopener\">AMSAT OSCAR-7<\/a> was the first to use the HELAPS modulation method developed by the founder of AMSAT-DL, Dr. Karl Meinzer. It serves to increase the efficiency by a parametric decomposition of the transmitted signal and the voltage-controlled modulation by a switching regulator. This so-called Mode B transponder, which gave radio amateurs worldwide access to the satellite frequencies at 435 and 145 MHz, was built by Karl Meinzer, DJ4ZC and the late AMSAT-DL co-founder Werner Haas, ex-DJ5KQ.<\/p>\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"981\" src=\"https:\/\/amsat-dl.org\/wp-content\/uploads\/2019\/01\/ao-7_2-1024x981.jpg\" alt=\"\" class=\"wp-image-2860257\" srcset=\"https:\/\/amsat-dl.org\/wp-content\/uploads\/2019\/01\/ao-7_2-1024x981.jpg 1024w, https:\/\/amsat-dl.org\/wp-content\/uploads\/2019\/01\/ao-7_2-150x144.jpg 150w, https:\/\/amsat-dl.org\/wp-content\/uploads\/2019\/01\/ao-7_2-300x288.jpg 300w, https:\/\/amsat-dl.org\/wp-content\/uploads\/2019\/01\/ao-7_2-768x736.jpg 768w, https:\/\/amsat-dl.org\/wp-content\/uploads\/2019\/01\/ao-7_2.jpg 1200w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div>\n<p>&nbsp;<\/p>\n<p>The following PDF documents provide further insight into AMSAT&#8217;s HELAPS technology.<\/p>\n\n<h4 class=\"wp-block-heading\">Karl Meinzer (DJ4ZC): &#8220;Lineare Nachrichtensatellitentransponder durch nichtlineare Signalzerlegung&#8221;, Inaugural dissertation for the award of a doctorate from the Physics Department of the Philipps University of Marburg\/Lahn, 1973<\/h4>\n\n<div data-wp-interactive=\"core\/file\" class=\"wp-block-file\"><object data-wp-bind--hidden=\"!state.hasPdfPreview\" hidden class=\"wp-block-file__embed\" data=\"https:\/\/amsat-dl.org\/wp-content\/uploads\/2024\/08\/Meinzer_HELAPS_Lineare-Nachrichtensatellitentransponder_durch_nichtlineare_Signalzerlegung.pdf\" type=\"application\/pdf\" style=\"width:100%;height:600px\" aria-label=\"Embed of Meinzer HELAPS Lineare Nachrichtensatellitentransponder Durch Nichtlineare Signalzerlegung.\"><\/object><a id=\"wp-block-file--media-f9cbeab6-d108-4227-a928-f43e333fd543\" href=\"https:\/\/amsat-dl.org\/wp-content\/uploads\/2024\/08\/Meinzer_HELAPS_Lineare-Nachrichtensatellitentransponder_durch_nichtlineare_Signalzerlegung.pdf\">Meinzer HELAPS Linear satellite transponder by non-linear signal decomposition<\/a><a href=\"https:\/\/amsat-dl.org\/wp-content\/uploads\/2024\/08\/Meinzer_HELAPS_Lineare-Nachrichtensatellitentransponder_durch_nichtlineare_Signalzerlegung.pdf\" class=\"wp-block-file__button wp-element-button\" download=\"\" aria-describedby=\"wp-block-file--media-f9cbeab6-d108-4227-a928-f43e333fd543\">Download<\/a><\/div>\n\n<h4 class=\"wp-block-heading\">A Linear Transponder for AMATEUR RADIO Satellites by Dr. K. Meinzer, DJ4ZC<\/h4>\n\n<div data-wp-interactive=\"core\/file\" class=\"wp-block-file\"><object data-wp-bind--hidden=\"!state.hasPdfPreview\" hidden class=\"wp-block-file__embed\" data=\"https:\/\/amsat-dl.org\/wp-content\/uploads\/2024\/08\/Meinzer_Linear_Transponder_For_Amateur_Radio_Satellites.pdf\" type=\"application\/pdf\" style=\"width:100%;height:600px\" aria-label=\"Embed of Meinzer Linear Transponder For Amateur Radio Satellites.\"><\/object><a id=\"wp-block-file--media-eb001177-f7ce-4d0c-b975-2273b37126d6\" href=\"https:\/\/amsat-dl.org\/wp-content\/uploads\/2024\/08\/Meinzer_Linear_Transponder_For_Amateur_Radio_Satellites.pdf\">Meinzer Linear Transponder For Amateur Radio Satellites<\/a><a href=\"https:\/\/amsat-dl.org\/wp-content\/uploads\/2024\/08\/Meinzer_Linear_Transponder_For_Amateur_Radio_Satellites.pdf\" class=\"wp-block-file__button wp-element-button\" download=\"\" aria-describedby=\"wp-block-file--media-eb001177-f7ce-4d0c-b975-2273b37126d6\">Download<\/a><\/div>\n\n<p><\/p>\n\n<p> <\/p>\n<p> <\/p>\n","protected":false},"excerpt":{"rendered":"<p>High Efficiency Linear Amplification via Parametric Synthesis One of the two linear transponders on board AMSAT OSCAR-7 was the first&hellip;<\/p>\n","protected":false},"author":4,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-4456277","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/amsat-dl.org\/en\/wp-json\/wp\/v2\/pages\/4456277","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/amsat-dl.org\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/amsat-dl.org\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/amsat-dl.org\/en\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/amsat-dl.org\/en\/wp-json\/wp\/v2\/comments?post=4456277"}],"version-history":[{"count":1,"href":"https:\/\/amsat-dl.org\/en\/wp-json\/wp\/v2\/pages\/4456277\/revisions"}],"predecessor-version":[{"id":4456278,"href":"https:\/\/amsat-dl.org\/en\/wp-json\/wp\/v2\/pages\/4456277\/revisions\/4456278"}],"wp:attachment":[{"href":"https:\/\/amsat-dl.org\/en\/wp-json\/wp\/v2\/media?parent=4456277"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}