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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/J4T4YCHQMHD3MBJBLX544CSPBCFM56C7/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "[email protected]",
    "message_id_hash": "J4T4YCHQMHD3MBJBLX544CSPBCFM56C7",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/PCF3R2OI24O2N77F7MII7TQWHR7BS7IB/?format=api",
    "sender": {
        "address": "zl2cia (a) paradise.net.nz",
        "mailman_id": null,
        "emails": null
    },
    "sender_name": "Sil - ZL2CIA",
    "subject": "[amsat-bb] Re: SUD (Small Ugly Dish)",
    "date": "2007-10-01T11:46:01Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/QJEB4NVZQ4UNXO36PBMTCBSWZOZ6F5YE/?format=api",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Eric,\n\nI've googled and looked in more traditional places for generalised \ndesign data for patch antennas but come up empty handed. If you can \nsuggest anywhere I might find some engineering design guides I'd be very \nhappy. I want to build some for various frequencies, not just 2,4 GHz.\n\nThanks\n\nSil\n\n\nEric H. Christensen wrote:\n> Thanks Bob.  I figured as much but I thought I'd ask.  I'm going to try\n> to set it up for S-band operation.  I'm going to try to build a patch\n> from ordinary items from around the house.  Maybe I can document it and\n> show others how to build their own setup to help demystify 2.4GHz.\n> \n> \n> 73s,\n> Eric Christensen, W4OTN\n> AMSAT Area Coordinator - Southeastern Virginia USA\n> AMSAT Member 35360\n> http://www.ericsatcom.net\n> \n> Donate to the Eagle Fund - http://www.amsat-na.com/donation.php?donate=eagle\n> \n> \n> \n> Bob Bruninga wrote:\n> \n>>>Back to my \"new\" [18\"] dish...  Being that it \n>>>is an offset dish, is 1.2GHz possible with \n>>>this dish?  \n>>\n>>No.\n>>\n>>\n>>>Anyone tried this?\n>>\n>>Yes.  I tried it for our satellite labs for students and althogh I get about 14 dB or so measured gain with it at 2.4 GHz, at 1.2 GHz, it was nothing more than a big piece of metal giving no more gain than a flat reflector... maybe between 3 to 6 dB.  \n>>\n>>See the photo of its use at 2.4 GHz on the top of this page:\n>>\n>>http://www.ew.usna.edu/~bruninga/ea467.html\n>>\n>>With the antenna for one of those $75 wireless camera receivers at the focal point, and the companion little wireless camera as a signal source a mile away with only its 1.5\" whip antenna, we receive the picture perfectly with a margin of at least 16 dB.  This means the picture would still be good out to maybe 6 miles...\n>>\n>>It sure is an easy way to get into Amateur TV.  Even though it does not even require a license..\n>>\n>>But if there are wireless LANS around, then the picture gets lots of QRM..\n>>\n>>Bob, Wb4APR\n>>\n> \n> \n> _______________________________________________\n> Sent via [email protected]. Opinions expressed are those of the author.\n> Not an AMSAT-NA member? Join now to support the amateur satellite program!\n> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb\n> \n\n",
    "attachments": []
}