TLC2H-433-5 Datasheet, PDF (10/11 Pages) Radiometrix Ltd – UHF Narrow Band FM Low Cost multi channel radio modules

The antenna choice and position directly controls the system range. Keep it clear of other metal in the
system, particularly the 'hot' end. The best position by far, is sticking out the top of the product. This is
often not desirable for practical/ergonomic reasons thus a compromise may need to be reached. If an
internal antenna must be used, try to keep it away from other metal components, particularly large
ones like transformers, batteries and PCB tracks/earth plane. The space around the antenna is as
important as the antenna itself.
A. Helical antenna
0.5 mm enameled copper wire
close wound on 3.2 mm diameter former
RF
433 MHz = 24 turns
C2
C3 C4
B. Loop antenna
RF-GND
C1
Feed point 15% to 25% of total loop length
track width = 1mm
4 to 10 cm² inside area
RF
16.4cm
C. Whip antenna
wire, rod, PCB-track or a combination
of these three
RF
433 MHz = 16.4 cm total from RF pin.
Figure 7: Antenna types
Variants and ordering information
Part No.
TLC2H-433-5
RLC2H-433-5
Description
Transmitter
Receiver
Frequency band
433.875-434.650MHz
433.875-434.650MHz
Other variants can be supplied to individual customer requirements at frequencies from 433MHz to 435MHz and/or
optimised for specific data speeds and formats. Please consult the Sales Department for further information.
Radiometrix Ltd
TLC2H/RLC2H Data Sheet
page 10