radio antenna

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    Microwave frequencies emitter circuit

    Hello, For my project I need to build a variable frequency emitter, with a frequency between 100MHz and 3500Mhz. I saw some simple RF circuits on the Internet but I don't think they can reach such high frequencies. Here is a circuit I've found : I don't need to transfer any information, so...
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    Large area 13.56MHz RFID Reader

    Hello everyone I'm newbie to RFIDs and I would like make large area reader. I found antenna from the Taobao site. Which is 45x30cm coil antenna. But the problem Is I can't seem to find reader that can use that large antenna. Any suggestions or help will be appreciated. Here is the antenna link...
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    Old Radio Antenna

    Hello, I am new here and I need help with an old portable radio antenna. It seems to have gotten the solid tip stuck or fallen into the entire thing. If there is a way to get this solid tip out could you please tell me?
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