Together with the new IC-905 ICOM introduced 3 omnidirectional antennas that are offered as accessories. In the common datasheet for all 3 antennas they are described as „collinear antenna“. Not a single word about the polarization. Collinear doesn’t necessarily mean vertical – it can be horizontal as well.<\/p>\n\n\n\n
It can be assumed (especially since the price is that high) that these SHF antennas are horizontally polarized – otherwise they would be almost useless as the whole world operates with horizontal polarization on those bands (beacons, ATV, SSB\/CW activity and even rare FM repeaters). I finally mounted and connected everything and was already excited how the reception of our local ATV repeater and several beacons nearby will be heard. ZERO.<\/p>\n\n\n\n After hours of unsuccessful investigation I came up to the idea that the only option was that the antennas have vertical polarization. And that’s exactly how it was. After a little more intensive search I read the datasheet of the AH-109PB that is also offered as accessory for the IC-905. And lo and behold there is written that it has vertical polarization. One assumes that it is „compatible“ with the omnidirectional antenna they can only be vertical.<\/p>\n\n\n\n Vertical omnidirectional antennas suitable for outdoor use for the 13cm and 6cm band with this or even more gain can be found everywhere on the internet for less than 20$ – so I have absolutely no idea what ICOM was thinking when they brought this completely overpriced junk in a beautiful case onto the market.<\/p>\n\n\n\n Dear ICOM: who the hell operates with vertical polarization on those bands??? Even in Japan every use case on 2,4GHz and above is 99% horizontal!<\/p>\n\n\n\n I guess that many dealers will have serious problems with their customers since it goes without saying that they should be horizontal…<\/p>\n","protected":false},"excerpt":{"rendered":" Together with the new IC-905 ICOM introduced 3 omnidirectional antennas that are offered as accessories. In the common datasheet for all 3 antennas they are described as „collinear antenna“. Not a single word about the polarization. Collinear doesn’t necessarily mean vertical – it can be horizontal as well. It can be assumed (especially since the […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"_links":{"self":[{"href":"http:\/\/blog.pauls.li\/index.php?rest_route=\/wp\/v2\/posts\/515"}],"collection":[{"href":"http:\/\/blog.pauls.li\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/blog.pauls.li\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/blog.pauls.li\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/blog.pauls.li\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=515"}],"version-history":[{"count":2,"href":"http:\/\/blog.pauls.li\/index.php?rest_route=\/wp\/v2\/posts\/515\/revisions"}],"predecessor-version":[{"id":517,"href":"http:\/\/blog.pauls.li\/index.php?rest_route=\/wp\/v2\/posts\/515\/revisions\/517"}],"wp:attachment":[{"href":"http:\/\/blog.pauls.li\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=515"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/blog.pauls.li\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=515"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/blog.pauls.li\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=515"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
Before I bought these 3 antennas I searched the internet with a statement on the ICOM UK website
(for example here: https:\/\/icomuk.co.uk\/AH-24-2400-MHz-Band-Collinear-Antenna\/4160\/1514\/41\/<\/a>) „horizontally polarized omnidirectional antenna“.<\/p>\n\n\n\n