MIMO communication

[adison]

Hallow friends
I take some receivers from remote control cars that work in frequency 27 MHZ
Every transmitter control only his receiver
For every receiver I add other antennas and I supply the right voltage
I put all the receivers in one big receiver that have a lot of antennas and switches
The problem is that the robot receive signal only when the antennas are very close
Why this happen ?
How I can large the range of receiver and transmitter
Thanks
adison

[Razor Concepts]

I put all the receivers in one big receiver that have a lot of antennas and switches

Having multiple receivers in close proximity is a bad idea, especially if they are all running near the 27mhz band.

For every receiver I add other antennas and I supply the right voltage

Most likely all of the antennas are getting slightly different signals (since they are in different locations), and all those different signals combine together and the receiver gets confused. You cannot add more antennas to get better range on something like this.

[SmAsH]

How I can large the range of receiver and transmitter

get a stronger transceiver pair?

[Soeren]

How I can large the range of receiver and transmitter

get a stronger transceiver pair?

Get a more selective transceiver pair!