rx2-433-40-5v Radiometrix Ltd, rx2-433-40-5v Datasheet - Page 7

• Manufacturer Part Number: rx2-433-40-5v
• Description: The Tx2 And Rx2 Data Link Modules Are A Miniature Pcb Mounting Uhf Radio Transmitter And Receiver Pair Which Enable The Simple Implementation Of A Data Link At Upto 160 Kbit/s At Distances Upto 75 Metres Inbuilding And 300 Metres Open Ground.
• Manufacturer: Radiometrix Ltd

Module mounting considerations
The modules may be mounted horizontally or vertically on an area of ground plane preferably close to
the antenna to minimise feed length. The receiver and it’s antenna should be kept away from sources of
interference (micro’s, SMPS etc.). The modules may be potted if required in a viscous compound which
can not enter the screen can..
Warning: Do NOT wash the modules. They are not hermetically sealed.
Antenna requirements
Three types of integral antenna are recommended and approved for use with the module:
Radiometrix Ltd., TX2 & RX2 Data Sheet
B. Loop antenna
C. Whip antenna
A. Helical antenna
Ultimate performance
Easy of design set-up
Size
Immunity proximity effects
Range open ground to similar antenna
(for TX2-433-14-5V & RX2-433-14-5V)
16.4cm
C3
C4
Fig. 7: module mounting options
C2
Antenna selection chart
RF
RF
C1
RF-GND
RF
Fig.8: Antenna
0.5 mm enameled copper wire
close wound on 3.2 mm diameter former
433 MHz = 24 turns
wire, rod, PCB-track or a combination
of these three
433 MHz = 16.4 cm total from RF pin.
Feed point 15% to 25% of total loop length
track width = 1mm
4 to 10 cm inside area
helical
**
**
***
**
200m
2
A
**
*
*
***
100m
loop
B
***
***
*
*
300m
whip
C
page 7