{"id":1550,"date":"2012-02-23T15:06:48","date_gmt":"2012-02-23T15:06:48","guid":{"rendered":"http:\/\/www.raymaps.com\/?p=1550"},"modified":"2012-02-23T15:33:03","modified_gmt":"2012-02-23T15:33:03","slug":"patch-antenna-design-using-transmission-line-model","status":"publish","type":"post","link":"https:\/\/www.raymaps.com\/index.php\/patch-antenna-design-using-transmission-line-model\/","title":{"rendered":"Patch Antenna Design using Transmission Line Model"},"content":{"rendered":"<p style=\"text-align: justify;\">A microstrip antenna can be designed using either the transmission line model or the cavity model (more complex models also exist that suit a particular design). We\u00a0here demonstrate\u00a0the transmission line model since it is fairly simple to implement and results in antenna designs with reasonably good performance in terms of return loss and efficiency.<\/p>\n<figure id=\"attachment_1573\" aria-describedby=\"caption-attachment-1573\" style=\"width: 416px\" class=\"wp-caption aligncenter\"><a href=\"http:\/\/www.raymaps.com\/index.php\/patch-antenna-design-using-transmission-line-model\/patch-antenna-design-2\/\" rel=\"attachment wp-att-1573\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-1573\" title=\"Patch Antenna Construction\" src=\"http:\/\/www.raymaps.com\/wp-content\/uploads\/2012\/02\/Patch-Antenna-Design1.jpg\" alt=\"Patch Antenna Construction\" width=\"416\" height=\"233\" srcset=\"https:\/\/www.raymaps.com\/wp-content\/uploads\/2012\/02\/Patch-Antenna-Design1.jpg 416w, https:\/\/www.raymaps.com\/wp-content\/uploads\/2012\/02\/Patch-Antenna-Design1-300x168.jpg 300w\" sizes=\"auto, (max-width: 416px) 100vw, 416px\" \/><\/a><figcaption id=\"caption-attachment-1573\" class=\"wp-caption-text\">Patch Antenna Construction<\/figcaption><\/figure>\n<p style=\"text-align: justify;\">The design starts with selecting the operating frequency, selecting a substrate with the required permittivity, and defining the width of the substrate. Thick substrates with low permittivity result in antenna designs with high efficiency and large bandwidths. Thin substrates with high permittivity lead to a smaller antenna size but with a lower bandwidth and a high-radiation loss. The tradeoffs between substrate thickness and permittivity and antenna bandwidth and efficiency have been discussed in the literature.<\/p>\n<p style=\"text-align: justify;\">According to the transmission line model, the length\u00a0<em>L<\/em> and width\u00a0<em>W<\/em> of the patch are calculated as<\/p>\n<p style=\"text-align: justify;\"><a href=\"http:\/\/www.raymaps.com\/index.php\/patch-antenna-design-using-transmission-line-model\/path-antenna-design-equations-3\/\" rel=\"attachment wp-att-1564\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-1564\" title=\"Path Antenna Design Equations\" src=\"http:\/\/www.raymaps.com\/wp-content\/uploads\/2012\/02\/Path-Antenna-Design-Equations2.jpg\" alt=\"\" width=\"294\" height=\"263\" \/><\/a><\/p>\n<p>\u00a0Although the design of the patch is quite simple, the design of the feeding mechanism is not that straightforward. There are four possible methods that can be used:<\/p>\n<p>(1) Microstrip-line feed<\/p>\n<p>(2) Probe feed<\/p>\n<p>(3) Aperture-coupled feed<\/p>\n<p>(4) Proximity-coupled feed<\/p>\n<p>Reference<\/p>\n<p>[1] Yasir Ahmed, Yang Hao, and Clive Parini, \u201cA 31.5\u2009GHz Patch Antenna Design for Medical Implants,\u201d <em>International Journal of Antennas and Propagation<\/em>, vol. 2008, Article ID 167980, 6 pages, 2008.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A microstrip antenna can be designed using either the transmission line model or the cavity model (more complex models also exist that suit a particular design). We\u00a0here demonstrate\u00a0the transmission line model since it is fairly simple to implement and results in antenna designs with reasonably good performance in terms of return loss and efficiency. The design starts with selecting the operating frequency, selecting a substrate with the required permittivity, and defining the width of the substrate. Thick substrates with low permittivity result in antenna designs with high efficiency and large bandwidths. Thin substrates with high permittivity lead to a smaller [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[12],"tags":[38,45],"class_list":["post-1550","post","type-post","status-publish","format-standard","hentry","category-ant","tag-antenna","tag-em-wave"],"_links":{"self":[{"href":"https:\/\/www.raymaps.com\/index.php\/wp-json\/wp\/v2\/posts\/1550","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.raymaps.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.raymaps.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.raymaps.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.raymaps.com\/index.php\/wp-json\/wp\/v2\/comments?post=1550"}],"version-history":[{"count":20,"href":"https:\/\/www.raymaps.com\/index.php\/wp-json\/wp\/v2\/posts\/1550\/revisions"}],"predecessor-version":[{"id":1575,"href":"https:\/\/www.raymaps.com\/index.php\/wp-json\/wp\/v2\/posts\/1550\/revisions\/1575"}],"wp:attachment":[{"href":"https:\/\/www.raymaps.com\/index.php\/wp-json\/wp\/v2\/media?parent=1550"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.raymaps.com\/index.php\/wp-json\/wp\/v2\/categories?post=1550"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.raymaps.com\/index.php\/wp-json\/wp\/v2\/tags?post=1550"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}