{"id":2295,"date":"2022-04-19T09:46:44","date_gmt":"2022-04-19T13:46:44","guid":{"rendered":"http:\/\/w8jxn.org\/?p=2295"},"modified":"2022-04-19T09:57:00","modified_gmt":"2022-04-19T13:57:00","slug":"what-is-characteristic-impedance-anyhow","status":"publish","type":"post","link":"https:\/\/w8jxn.org\/?p=2295","title":{"rendered":"What is characteristic impedance, anyhow?"},"content":{"rendered":"\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"http:\/\/w8jxn.org\/wp-content\/uploads\/2022\/04\/Transmission_line_schematic.svg_.png\" alt=\"\" class=\"wp-image-2296\"\/><\/figure>\n\n\n\n<p>What distinguishes &#8220;impedance&#8221; from &#8220;characteristic&#8221; impedance? A 1 foot length of RG-8X coax has a characteristic impedance of 50 Ohms. But does that cable present a 50 Ohm resistance to DC current flow? Can you describe the current flow that exists on such a coax cable if the end is open?<\/p>\n\n\n\n<p>When you understand characteristic impedance you can answer the above questions.<\/p>\n\n\n\n<p>Please view the 3 minute video below where Wes Cardone (N8QM) illustrates characteristic impedance with animation.<\/p>\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=\"Characteristic Impedance  Not Rocket Science\" width=\"640\" height=\"360\" src=\"https:\/\/www.youtube.com\/embed\/cnhfjBr86aM?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><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>What distinguishes &#8220;impedance&#8221; from &#8220;characteristic&#8221; impedance? A 1 foot length of RG-8X coax has a characteristic impedance of 50 Ohms. But does that cable present a 50 Ohm resistance to DC current flow? Can you describe the current flow that exists on such a coax cable if the end is open? When you understand characteristic&#8230;<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"advgb_blocks_editor_width":"","advgb_blocks_columns_visual_guide":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-2295","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"author_meta":{"display_name":"N8QM","author_link":"https:\/\/w8jxn.org\/?author=2"},"featured_img":null,"coauthors":[],"tax_additional":{"categories":{"linked":["<a href=\"https:\/\/w8jxn.org\/?cat=1\" class=\"advgb-post-tax-term\">Uncategorized<\/a>"],"unlinked":["<span class=\"advgb-post-tax-term\">Uncategorized<\/span>"]}},"comment_count":"0","relative_dates":{"created":"Posted 4 years ago","modified":"Updated 4 years ago"},"absolute_dates":{"created":"Posted on April 19, 2022","modified":"Updated on April 19, 2022"},"absolute_dates_time":{"created":"Posted on April 19, 2022 09:46","modified":"Updated on April 19, 2022 09:57"},"featured_img_caption":"","_links":{"self":[{"href":"https:\/\/w8jxn.org\/index.php?rest_route=\/wp\/v2\/posts\/2295","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/w8jxn.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/w8jxn.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/w8jxn.org\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/w8jxn.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2295"}],"version-history":[{"count":2,"href":"https:\/\/w8jxn.org\/index.php?rest_route=\/wp\/v2\/posts\/2295\/revisions"}],"predecessor-version":[{"id":2298,"href":"https:\/\/w8jxn.org\/index.php?rest_route=\/wp\/v2\/posts\/2295\/revisions\/2298"}],"wp:attachment":[{"href":"https:\/\/w8jxn.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2295"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/w8jxn.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2295"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/w8jxn.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2295"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}