{"id":1480,"date":"2013-11-07T14:44:10","date_gmt":"2013-11-07T20:44:10","guid":{"rendered":"http:\/\/www.velocity-xl.com\/blog\/?p=1480"},"modified":"2013-12-23T13:07:28","modified_gmt":"2013-12-23T19:07:28","slug":"13-99-transponder-antenna-ground-plane","status":"publish","type":"post","link":"https:\/\/www.velocity-xl.com\/blog\/2013\/11\/07\/13-99-transponder-antenna-ground-plane\/","title":{"rendered":"13.1.6 Transponder Antenna Ground Plane"},"content":{"rendered":"<div class=\"pps-series-post-details pps-series-post-details-variant-classic pps-series-post-details-4068\" data-series-id=\"37\"><div class=\"pps-series-meta-content\"><div class=\"pps-series-meta-text\">This entry is part 13 of 67 in the series <a href=\"https:\/\/www.velocity-xl.com\/blog\/series\/13-electrical-instrumentation\/\">13 - Electrical \/ Instruments<\/a><\/div><\/div><\/div><p>Since the airframe is non-conductive fiberglass, I need a ground plane for the transponder antenna. Because the transponder operates on two frequencies, a circular ground plane isn&#8217;t optimal. I purchased a document from<a href=\"http:\/\/www.rst-engr.com\/\"> RST Engineering<\/a> that provides the information needed to design antennas. But fellow builder John Tvedt had already built his some he sent me the template.<\/p>\n<p>So I printed out the template and glued it to a piece of aluminum.<\/p>\n<p><a href=\"https:\/\/www.velocity-xl.com\/blog\/wp-content\/uploads\/2013\/11\/2013-11-01-IMG_20131101_104348_591.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-thumbnail wp-image-1481\" alt=\"2013-11-01 IMG_20131101_104348_591\" src=\"https:\/\/www.velocity-xl.com\/blog\/wp-content\/uploads\/2013\/11\/2013-11-01-IMG_20131101_104348_591-150x150.jpg\" width=\"150\" height=\"150\" \/><\/a><\/p>\n<p>Then cut out the aluminum.<\/p>\n<p><a href=\"https:\/\/www.velocity-xl.com\/blog\/wp-content\/uploads\/2013\/11\/2013-11-01-IMG_20131101_105107_432.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-thumbnail wp-image-1482\" alt=\"2013-11-01 IMG_20131101_105107_432\" src=\"https:\/\/www.velocity-xl.com\/blog\/wp-content\/uploads\/2013\/11\/2013-11-01-IMG_20131101_105107_432-150x150.jpg\" width=\"150\" height=\"150\" \/><\/a><\/p>\n<p>Drilled a hole and attached the antenna.<\/p>\n<p><a href=\"https:\/\/www.velocity-xl.com\/blog\/wp-content\/uploads\/2013\/11\/2013-11-07-IMG_20131107_201743_501.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-thumbnail wp-image-1483\" alt=\"2013-11-07 IMG_20131107_201743_501\" src=\"https:\/\/www.velocity-xl.com\/blog\/wp-content\/uploads\/2013\/11\/2013-11-07-IMG_20131107_201743_501-150x150.jpg\" width=\"150\" height=\"150\" \/><\/a><\/p>\n<p>Now I just have to build the mount for the antenna assembly.<\/p>\n","protected":false},"excerpt":{"rendered":"<div class=\"pps-series-post-details pps-series-post-details-variant-classic pps-series-post-details-4068 pps-series-meta-excerpt\" data-series-id=\"37\"><div class=\"pps-series-meta-content\"><div class=\"pps-series-meta-text\">This entry is part 13 of 67 in the series <a href=\"https:\/\/www.velocity-xl.com\/blog\/series\/13-electrical-instrumentation\/\">13 - Electrical \/ Instruments<\/a><\/div><\/div><\/div><p>Since the airframe is non-conductive fiberglass, I need a ground plane for the transponder antenna. Because the transponder operates on two frequencies, a circular ground plane isn&#8217;t optimal. I purchased a document from RST Engineering that provides the information needed &hellip; <a href=\"https:\/\/www.velocity-xl.com\/blog\/2013\/11\/07\/13-99-transponder-antenna-ground-plane\/\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[45],"tags":[],"series":[37],"class_list":["post-1480","post","type-post","status-publish","format-standard","hentry","category-45","series-13-electrical-instrumentation"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/www.velocity-xl.com\/blog\/wp-json\/wp\/v2\/posts\/1480","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.velocity-xl.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.velocity-xl.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.velocity-xl.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.velocity-xl.com\/blog\/wp-json\/wp\/v2\/comments?post=1480"}],"version-history":[{"count":2,"href":"https:\/\/www.velocity-xl.com\/blog\/wp-json\/wp\/v2\/posts\/1480\/revisions"}],"predecessor-version":[{"id":1555,"href":"https:\/\/www.velocity-xl.com\/blog\/wp-json\/wp\/v2\/posts\/1480\/revisions\/1555"}],"wp:attachment":[{"href":"https:\/\/www.velocity-xl.com\/blog\/wp-json\/wp\/v2\/media?parent=1480"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.velocity-xl.com\/blog\/wp-json\/wp\/v2\/categories?post=1480"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.velocity-xl.com\/blog\/wp-json\/wp\/v2\/tags?post=1480"},{"taxonomy":"series","embeddable":true,"href":"https:\/\/www.velocity-xl.com\/blog\/wp-json\/wp\/v2\/series?post=1480"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}