{"id":7049,"date":"2011-07-10T21:42:44","date_gmt":"2011-07-11T03:42:44","guid":{"rendered":"http:\/\/ishmaels.net\/blog\/?p=7049"},"modified":"2011-07-10T21:42:44","modified_gmt":"2011-07-11T03:42:44","slug":"comparison-and-selection-of-microwave-and-rf-coaxial-adapters","status":"publish","type":"post","link":"https:\/\/www.ishmaels.net\/blog\/2011\/07\/10\/comparison-and-selection-of-microwave-and-rf-coaxial-adapters\/","title":{"rendered":"Comparison and Selection of Microwave and RF Coaxial Adapters"},"content":{"rendered":"<p>This popped up on the &#8220;grab-bag&#8221; visiting author plugin I have. \u00a0it is good info for maybe some day? \u00a0or Maybe other need this. \u00a0I doubt that I will do much ultra High Freq playing for some time, if ever, but some do play the upper limits and this is good to check out. \u00a0&#8211; WD0AJG<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>When <strong>one<\/strong> looks to select a microwave\/<strong>RF<\/strong> coaxial adapter, at first glance there is a wide variation between <strong class='StrictlyAutoTagBold'>pricing<\/strong> for apparently similar parts. As an example, a glance at what&#8217;s available on the <strong>web<\/strong> <strong class='StrictlyAutoTagBold'>shows<\/strong> N\/M-<strong>SMA<\/strong>\/f coaxial adapters ranging from $3 to $110. This <strong>article<\/strong> will address the differences between coaxial adapters &amp; <strong>help<\/strong> in the selection of the proper adapter for a particular application.<\/p>\n<p>The first <strong class='StrictlyAutoTagBold'>issue<\/strong> to be aware of is that different specifications exist for many classes of adapters. There are 6 different standards for the <strong>TNC<\/strong> connector, though the industry has largely settled on 3 standards; All seem to mate, the upper <strong>frequency<\/strong> limit can be 11, 16, or 18 GHz. The <strong>SMP<\/strong> standard is in a constant state of revision, and the tolerances specified allow parts to be built that will not mate properly. N adapters come in 11\/12 and 18 GHz versions, depending upon the interface specification being used; <strong>SMA<\/strong>&#8216;s come in 18 and 27 GHz versions. Multiple standards exist for the F connector, not all of which are interchangeable. For most <strong>Microwave<\/strong> connectors, either a Military specification or Industry specification exists, though for large volume low <strong>cost<\/strong> applications these specifications are sometimes ignored.<\/p>\n<p>A second <strong class='StrictlyAutoTagBold'>issue<\/strong> is the material used. N, <strong>SMA<\/strong>, and <strong>TNC<\/strong> adapters\/connectors come in both Brass and Stainless steel versions. The original reason to offer brass <strong>SMA<\/strong> parts was a large differential that existed at that <strong>time<\/strong> between the <strong>cost<\/strong> of brass and stainless steel, a differential that has changed quite a bit over <strong>time<\/strong>. The different materials have different torque requirements, some connectors such as the brass sma can be damaged by applying too much torque. The military and industrial specifications for sma&#8217;s say virgin Teflon should be used; to save money, lower <strong>cost<\/strong> applications will substitute formed teflon, or rexolite. <strong>BNC<\/strong> female connector contacts in the Mil Specs are BeCu; almost all <strong>BNC<\/strong>&#8216;s at consumer outlets are brass.<\/p>\n<p>When <strong>one<\/strong> looks at the options available, as in, <a href=\"http:\/\/www.fairviewmicrowave.com\/coaxial_adapters.htm\" rel=\"nofollow\" target=\"_new\">N, SMA, and TNC adapters<\/a>, <strong>one<\/strong> must keep in mind that these options are available from a single supplier, &amp; be aware of the tradeoffs involved.<\/p>\n<p>Thirdly, plating varies widely. An <strong>SMA<\/strong> built to the Mil Specs will have 50 micro inches of Gold on the male and female contacts; a widely used European standard specifies 30 micro inches; it&#8217;s not uncommon to find low <strong>cost<\/strong> parts intended for high volume applications to have either 10 microinches of gold, or even &#8220;flash&#8221; gold, which is roughly 3 microinches. Some coaxial microwave adapters now are intended for low passive intermodulation (<strong>PIM<\/strong>) applications, and the plating and material selection are critical to parts with good, low <strong>PIM<\/strong>.<\/p>\n<p>So which part is suitable for your application? In the example of the $3 vs. $110 N to <strong>SMA<\/strong> adapter, the $3 adapter is fine for applications in benign environments, where the part will only be connected once or twice, the temperature <strong>doesn<\/strong>&#8216;t <strong>change<\/strong> radically or quickly, the <strong>frequency<\/strong> range is not too high, &amp; no severe vibration exists; ham radio and <strong>home<\/strong> applications. On the other <strong>hand<\/strong>, for an 18GHZ part requiring very low <strong>VSWR<\/strong>, will be used in military aircraft or space applications, will be mated\/demated often, then the $110 part is the correct choice.<\/p>\n<p>Bob Hawkins <a href=\"http:\/\/www.fairviewmicrowave.com\" target=\"_new\">http:\/\/www.fairviewmicrowave.com<\/a><\/p>\n<p>Author: <a href=\"http:\/\/EzineArticles.com\/?expert=Bob_Hawkins\">Bob Hawkins<\/a><br \/>\nArticle Source: <a href=\"http:\/\/ezinearticles.com\/?Comparison-and-Selection-of-Microwave-and-RF-Coaxial-Adapters&amp;id=5683471\">EzineArticles.com<\/a><br \/>\n<a href=\"http:\/\/retirementpass.com\/\">Retirement plan<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>When one looks to select a microwave\/rf coaxial adapter, at first glance there is a wide variation between pricing for apparently similar parts. As an example, a glance at what&#8217;s available on the web shows N\/M-SMA\/f coaxial adapters ranging from $3 to $110. This article will address the differences between coaxial adapters &amp; help in the selection of the proper adapter for a particular application. <\/p>\n<p><a href=\"https:\/\/www.ishmaels.net\/blog\/2011\/07\/10\/comparison-and-selection-of-microwave-and-rf-coaxial-adapters\/\">&#8220;And Now the Rest of the Story &#8211; &#8220;Comparison and Selection of Microwave and RF Coaxial Adapters<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_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":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[6],"tags":[],"class_list":["post-7049","post","type-post","status-publish","format-standard","hentry","category-hobbies","odd"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Comparison and Selection of Microwave and RF Coaxial Adapters - And That was How it Went<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.ishmaels.net\/blog\/2011\/07\/10\/comparison-and-selection-of-microwave-and-rf-coaxial-adapters\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Comparison and Selection of Microwave and RF Coaxial Adapters - And That was How it Went\" \/>\n<meta property=\"og:description\" content=\"When one looks to select a microwave\/rf coaxial adapter, at first glance there is a wide variation between pricing for apparently similar parts. 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Unlike current Mil Spec coax which must meet tough specific criteria, RG coax made today meets only the standards of the company producing it. In certain applications\u2026","rel":"","context":"In &quot;Hobbies&quot;","block_context":{"text":"Hobbies","link":"https:\/\/www.ishmaels.net\/blog\/category\/hobbies\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":8846,"url":"https:\/\/www.ishmaels.net\/blog\/2011\/11\/27\/are-you-as-sharp-as-you-think\/","url_meta":{"origin":7049,"position":2},"title":"Are you as sharp as you think?","author":"wd0ajg","date":"November 27, 2011","format":false,"excerpt":"I find that the years and lack of keeping up have dulled some of my knowledge on the subjects of Ham Radio.\u00a0 How about you?\u00a0 Are you keeping up, remembering things? I k now there are a ton of changes and things are really different than when I started but\u2026","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":3006,"url":"https:\/\/www.ishmaels.net\/blog\/2010\/11\/08\/wifi-how-to-get-a-rock-solid-internet-connection\/","url_meta":{"origin":7049,"position":3},"title":"WIFI \u2013 How to Get a Rock-Solid Internet Connection","author":"wd0ajg","date":"November 8, 2010","format":false,"excerpt":"Nearly everyone has trouble getting a good wireless connection at one time or another. 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You will enjoy substantial savings on your energy expenses while making your world a much better place to live in.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":1152,"url":"https:\/\/www.ishmaels.net\/blog\/2010\/08\/06\/sdr-is-leading-ham-radio-into-a-new-era-2\/","url_meta":{"origin":7049,"position":5},"title":"SDR is Leading Ham Radio Into a New Era","author":"wd0ajg","date":"August 6, 2010","format":false,"excerpt":"SDR, Software Defined Radio, is a new technology which will change Ham Radio fundamentally. In this article the author describes the differences between a classic radio and this new technology. 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