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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/73SPHMRHTTWALLY7RKESIPCZ5DF362HM/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "CC797DE26B0740C49D5F257C51F7F248@Athlon",
    "message_id_hash": "73SPHMRHTTWALLY7RKESIPCZ5DF362HM",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/2MWKVTPKXHXENMZ5FHA4XI3R4UGT66B3/?format=api",
    "sender": {
        "address": "ve4yz (a) mts.net",
        "mailman_id": null,
        "emails": null
    },
    "sender_name": "Alan VE4YZ",
    "subject": "[amsat-bb] Re: Making a Circular Polarized antenna",
    "date": "2009-10-25T01:08:49Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/2MWKVTPKXHXENMZ5FHA4XI3R4UGT66B3/?format=api",
    "children": [
        "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/FLMIPEGABXNED2YZLPACKLTXA73XHZY3/?format=api"
    ],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "http://www.enzim.hu/~szia/emanim/emanim.htm\n\nAbove link has a wonderful 3D graphic display of waves. Give it a try.\n\nYou can adjust V, H, phase, and then display sum of the 2 waves.\n\nI use it mainly to show how circular polarization comes about.\n\nThe sum of 2 waves in the same plane ( 180 degrees rotated ), 180 degrees\nout of phase ( 1/2 wavelength ) is a nul which probably would be out\nperformed by a rubber ducky. \n\n\n\n\n> -----Original Message-----\n> From: [email protected] \n> [mailto:[email protected]] On Behalf Of Greg D.\n> Sent: October 24, 2009 7:34 PM\n> To: [email protected]\n> Subject: [amsat-bb] Making a Circular Polarized antenna\n> \n> \n> Hi folks,\n> \n> Just curious...\n> \n> One of the ways to make a circularly polarized antenna is to \n> feed two linearly polarized antennas in-phase, but mount one \n> them 90 degrees rotated from the other, and 1/4 wavelength \n> ahead of it.\n> \n> Couldn't one also mount the two antennas 180 degrees rotated \n> and 1/2 wavelength ahead?  \n> \n> The reason I ask is that I have some flat panel 2.4 ghz \n> \"Wi-Fi\" antennas, and the mounting holes work out best that way.\n> \n> The only effect I can think of is that the array will \n> probably pick up signals from both left and right \n> polarizations, which could actually be handy.\n> \n> Greg  KO6TH\n> \n>  \t\t \t   \t\t  \n> _________________________________________________________________\n> Windows 7: It helps you do more. Explore Windows 7.\n> http://www.microsoft.com/Windows/windows-7/default.aspx?ocid=P\n> ID24727::T:WLMTAGL:ON:WL:en-US:WWL_WIN_evergreen3:102009\n> _______________________________________________\n> Sent via [email protected]. Opinions expressed are those of \n> the author.\n> Not an AMSAT-NA member? Join now to support the amateur \n> satellite program!\n> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb\n> \n\n",
    "attachments": []
}