2.4 g dual antennas
#1
2.4 g dual antennas
What do you all think about dual antennas on 2.4g receivers ? Pros& Cons.
#2
Tech Champion
iTrader: (21)
The is no real con other than having to route the external one's antenna wire. The pros would be questionable though considering even micro receivers with internal antennas only often list a reception distance larger than any track you'll ever see anyway. In other words, I wouldn't go out of my way to buy a dual antenna receiver.
#3
I'd like to see some manufacturer measurements on diversity antenna use indoors. Range isn't the issue, but resistance to interference or multipath would be a useful benefit.
#4
I was under the impression, the dual antenna was for telemetry for aircraft. They have many more servos, motors to keep track of, and 2 antenna handle the signal better.
#6
Not true.
From Futaba's description of the R614FS (which is a surface receiver for the 4PKS/4PKSR). Only one antenna is external.
The R614FS (FUTL7635) is compact, with a high-voltage design, fail-safe, DAD (Dual Antenna Diversity) and the push-button ease of the Easy-Link™.
http://www.futabarc.com/systems/futk...ksr/index.html
From Futaba's description of the R614FS (which is a surface receiver for the 4PKS/4PKSR). Only one antenna is external.
The R614FS (FUTL7635) is compact, with a high-voltage design, fail-safe, DAD (Dual Antenna Diversity) and the push-button ease of the Easy-Link™.
http://www.futabarc.com/systems/futk...ksr/index.html
#7
Asked Futaba about dual ant. They call it a dual diversity ant. Which ever ant. receivesthe best signal that's the one that's used. Simple explanation.
#8
The way diversity antennas work is that the PHY looks at the RF energy present at each antenna prior to the start of the "packet" of data (called the preamble). Most diverstiy algorithms just select the antenna with the strongest signal as the "best", which it might not be. For digital data, they don't switch in the middle of the packet, as that results in lost data. The strongest signal may be due to multipath (two reflected signals adding together), or from a stronger interference generator (like a leaky microwave oven, or a WiFi device transmitting in the vicinity).
#10
Tech Initiate
dual antennas
Is it possible then to for ex when driving 1/12 electric to remove the external antenna and only use the internal ?