Hi,
Currently, I am using three antenna to receive pipe to three receivers (nRF24L01) from single transmitter.
Can I use single antenna to receive signal for all three receivers? If yes, then how? Currently I am not able to do.
No, each receiver needs its own antenna. I guess you could multiplex an antenna between the 3 recvrs but I don't know what your setup is .
I am using nRF24L01 as one way transmitter with arduino mini and three nRF24L01 as receivers with Arduino Nano. All have individual Antenna.
Guide me on multiplexing. I am also searching.
Multiplex is a controlled switch. But it will probably mess up the antenna impedance so it probably will not work.
For every receiver you connect an antenna you loose 3dB of signal. Therefore halving the distance you can receive a signal from. It doesn't take much until you have a system that refuses to work.
Multiplexing, that is switching an antenna from one receiver to the next, will work using IC multiplexers. You can't use normal multiplexer chips because the frequency these will carry is very limited, and no where near the UHF frequencies you require. You could, of course, make your own multiplexer but you have not got the skill nor the equipment to do this. You would need to be an RF engineer and that is a specialist area of electronics.
Why do you need 3 receivers? Can you explain your project in a bit more detail.
I am using three nanos to drive 4 stepper motors. Two stepper and one DC motor is on one nano, second stepper and few digital signals are on second nano and third nano is for another stepper motor. Third nano is kept separate intentionally as this stepper goes into loop. Until the loop in complete all other function will stop.
I can switch to Mega to drive three steppers and control signals but one stepper, I have to keep separate.
I was interested in keeping one antenna for all my controllers.
terminology:
preamp: takes antenna input and boosts it 5 or 10 db.
passive splitter: one antenna in, two antenna outputs, 3.5 db loss at the outputs. these work both ways: Two antenna level inputs, one combined output. I use these to combine CCTV channels from an RF modulator with over the air antenna input, to have CCTV and broadcast monitors everywhere
power amp: not what you need
distribution amplifier: the one in many out box in your cable tv system. you have to look long to find one for 2,.4 ghz
thank you, no:
the maker of this has a profound absence of understanding of the topic under discussion.
Have you disabled the acknowledgement transmission from the receivers??????
Yes, it is disabled. As far as one transmitter to three receiver, communication is smooth and strong.
Then to use three receivers with one antenna, they must be close to each other. Is that the case? Do all the receivers have separate power supplies?
Find an antique television antenna splitter that splits three ways and use that to connect one antenna to three receivers. I think I have a two-way splitter in a junk box.
If that fails, use a small value capacitor to connect each receiver to a common antenna.
If you are using the very cheap super regenerative receivers you can only have one receiver/antenna as the signal from one receiver will wipe out the others.
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