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Topic: is there anyway to make smaller antenna for FPV system ? (Read 1 time) previous topic - next topic

firashelou


if you have a piece of decent 75 ohm coax, why would you want to attach antenna to it?
just use cable's core as the antenna. strip it to needed lenght making shure that the screen doesn't touch it, then solder other end to the antenna output, solder screen to the ground and you should be fine.

tv coax will be a pain to work with though. those are rather thick and not very flexible. not exactly something good for RC imo


ok then let's forget about it and stick to the copper i will get a copper wire tomorrow and i will start working on it
Aiming for the unreachable !

patryk

you have nice copper wire inside coax cable.
copper core of your tv coax will probably do just fine as an antenna. just strip it, cut it and solder it.

firashelou


you have nice copper wire inside coax cable.
copper core of your tv coax will probably do just fine as an antenna. just strip it, cut it and solder it.


ok i will so in the datasheet of my RFs it says antenna should be : Attenna:25cm Single core wire or mutil?core wire

and a remark :
VCC voltage module operating voltage and good power filtering;
A great influence on the antenna module reception, preferably connected to the
1/4 wavelength of the antenna, generally a 50 ohm single?core wire, the length of
the antenna 315M approximately 23cm
Antenna position has also affected the reception of the module, the installation,
the antenna as possible straight away from the shield, high pressure, and
interference source; frequency used to receive, decode and oscillation resistor
should match with the transmitter.
Aiming for the unreachable !

firashelou

#18
Sep 15, 2013, 05:54 pm Last Edit: Sep 15, 2013, 05:55 pm by firashelou Reason: 1
here are some pictures of what i did, i cut a 26.5 cm antenna so 25+1.5cm, i need 25cm which is written in the datasheet of RF
i then stripped it and then i put a heatshrink around

so i need to know if i could have kept the white insulation as cover ?
Aiming for the unreachable !

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