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    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/ZCQ46BBDQPV3SCGQYHNSHI3SEB72J4A3/?format=api",
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    "message_id": "[email protected]",
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    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/35EKUCC2KGE6IFYYUGZHATC5SXM5JC3W/?format=api",
    "sender": {
        "address": "documike (a) comcast.net",
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    "sender_name": "Mike Lucas",
    "subject": "[AMSAT-BB] Re: Antennas for Satelittes Operations.",
    "date": "2022-04-10T20:56:29Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/IKW6U6JTCUW7B4AX75HIDVSHMFZGM7J6/?format=api",
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    "content": "Spot on advice.\n\n \n\nFrom: Mark Johns, K0JM <[email protected]> \nSent: Sunday, April 10, 2022 9:05 AM\nTo: Francis F1RRJ <[email protected]>\nCc: Clint Bradford via AMSAT-BB <[email protected]>\nSubject: [AMSAT-BB] Re: Antennas for Satelittes Operations.\n\n \n\nCrossed yagis in circular polarization, such as the M2 LEOpack, are probably the most popular satellite antennas in the U.S. In Europe, I believe that circularly polarized quad antennas, such as the Wimo beams, may be a bit more popular.\n\n \n\nWhile many types of antennas will work, most operators quickly become dissatisfied with various omnidirectional antennas and will switch to small beams for added gain, especially for receiving. Receive preamps near the antenna are also most helpful if feedlines are longer than 10-12 meters or so.\n\n \n\nAlso, while linear antennas (horizontal or vertical) will provide gain, they will also suffer from polarization fading as the satellites tumble in space. Circular polarization, or the ability to switch quickly between horizontal and vertical polarization, are much preferred.\n\n--\n\nMark D. Johns, KØJM\nAMSAT Ambassador & News Service Editor\nBrooklyn Park, MN USA   EN35hd\n\n-----------------------------------------------\n\n\"Heaven goes by favor; if it went by merit,\n\n   you would stay out and your dog would go in.\"\n\n    ---Mark Twain\n\n \n\n \n\nOn Sun, Apr 10, 2022 at 3:39 AM Francis F1RRJ <[email protected] <mailto:[email protected]> > wrote:\n\nHello all,\n\n \n\nI hope to know what kind of antenna you use for satelittes on 70cm and 2m bands (Cross yagi, Helicoidal antennas, …)\n\n \n\nMany thanks per advance.\n\n \n\n73s.\n\nFrancis, F1RRJ.\n\n\n-----------------------------------------------------------\n\nSent via AMSAT-BB(a)amsat.org <http://amsat.org> . AMSAT-NA makes this open forum available\nto all interested persons worldwide without requiring membership. Opinions expressed\nare solely those of the author, and do not reflect the official views of AMSAT-NA.\nAcceptable Use and Privacy Policies available at https://www.amsat.org/about-amsat/\n\nView archives of this mailing list at\nhttps://mailman.amsat.org/hyperkitty/list/[email protected]\nTo unsubscribe send an email to amsat-bb-leave(a)amsat.org <http://amsat.org> \nManage all of your AMSAT-NA mailing list preferences at https://mailman.amsat.org\n\n\n\n",
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