{"id":45,"date":"2012-10-03T18:52:13","date_gmt":"2012-10-03T16:52:13","guid":{"rendered":"https:\/\/pa3csg.nl\/?page_id=45"},"modified":"2016-10-02T21:03:31","modified_gmt":"2016-10-02T19:03:31","slug":"wilkinson-divider-for-145-mhz","status":"publish","type":"page","link":"https:\/\/pa3csg.nl\/?page_id=45","title":{"rendered":"Wilkinson divider for 145 MHz"},"content":{"rendered":"

For operation on 2320MHz I needed a receive power splitter for my IF 144 MHz. It had to cover the 100-150 MHz range.<\/p>\n

The first idea was to build a resistive power divider but I ended up with a Wilkinson divider. Because of the long pieces of coax I decided<\/p>\n

to build the Wilkinson divider out of lumped parts. In order to keep small.<\/p>\n

It had to be a quick and dirty project, so I used a tinned box.<\/p>\n

The circuit diagram:<\/p>\n

 <\/p>\n

\"wilkinson-lumped-150mhz\"<\/p>\n

 <\/p>\n

The simulation showed the following result:<\/p>\n

 <\/p>\n

\"wilkinson-lumped-150mhz-sweep\"<\/p>\n

 <\/p>\n

It was decided to keep things simple. I used 4 capacitors, each 22 pF and 2 small air coils. I had to fiddle a bit because the box was a bit to big.<\/p>\n

I ended up with 6 turns on a 4mm diameter about 12mm long. As you can see on the photo I had to stretch the coils a bit, I tried to make it a bit more wideband.<\/p>\n

 <\/p>\n

\"wilkinson-150mhz-klein\"<\/p>\n

 <\/p>\n

Measurements:<\/p>\n

Centre frequency 150 MHz and a span of 100 MHz.<\/p>\n

 <\/p>\n

\"s21-wilkinson-klein\"<\/p>\n

 <\/p>\n

The isolation between the ports is shown below:<\/p>\n

 <\/p>\n

\"s23-wilkinson-klein\"<\/p>\n","protected":false},"excerpt":{"rendered":"

For operation on 2320MHz I needed a receive power splitter for my IF 144 MHz. It had to cover the 100-150 MHz range. The first […]<\/a><\/p>\n<\/div>","protected":false},"author":1,"featured_media":865,"parent":0,"menu_order":65,"comment_status":"closed","ping_status":"closed","template":"","meta":[],"categories":[39,16],"tags":[],"_links":{"self":[{"href":"https:\/\/pa3csg.nl\/index.php?rest_route=\/wp\/v2\/pages\/45"}],"collection":[{"href":"https:\/\/pa3csg.nl\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/pa3csg.nl\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/pa3csg.nl\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/pa3csg.nl\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=45"}],"version-history":[{"count":4,"href":"https:\/\/pa3csg.nl\/index.php?rest_route=\/wp\/v2\/pages\/45\/revisions"}],"predecessor-version":[{"id":990,"href":"https:\/\/pa3csg.nl\/index.php?rest_route=\/wp\/v2\/pages\/45\/revisions\/990"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pa3csg.nl\/index.php?rest_route=\/wp\/v2\/media\/865"}],"wp:attachment":[{"href":"https:\/\/pa3csg.nl\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=45"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/pa3csg.nl\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=45"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/pa3csg.nl\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=45"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}