How to make an 2.4GHz antenna
January 16, 2010
Hello LMR! I am assembling a wireless video transmitter that calls for an antenna. As an amateur radio operator (licensed at age 11) I ought to know how to build an antenna, but unfortunately I do not. Google is kind of helpful -- I found a few suggestions about turning a coax cable into an antenna, but there's a lot to sort through. Also, a 50ohm lead is called for in the data sheet, and I don't know if I can substitute a resistor (the data sheet calls for a 50ohm= 75mil@1mm thick trace -- which seems like it would have 0 ohms if I made it out of copper). Basically, I am confused, and wonder if any folks here at LMR have built something like this before and could tell me what the data sheet is asking me to do.
Thank you for your help!
The Airwave modules were from a Trimersion prototype, so I also found this example of how Trimersion built an antenna: pic at http://www.rcgroups.com/forums/attachment.php?s=fafdf6d42d090a17dbdba07be38d4b02&attachmentid=2977244 from thread http://www.rcgroups.com/forums/showthread.php?p=14015873
The little gray wire coming off the big metal module is the TX antenna.