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SiFLEX02 TRANSCEIVER MODULE
DATASHEET
Antenna Options
The SiFLEX02 module includes multiple antenna options. The module’s regulatory certification has
been completed with the following antennas:
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Integrated 3.2-inch wire monopole soldered to the board.
Pulse W3112A helical antenna
LSR 001-0002 900 MHz Dipole Antenna with Reverse Polarity SMA Connector and LSR 080-0001 u.fl to
Reverse Polarity SMA Bulkhead Cable 105mm
Nearson S467AH-915 dipole antenna attached to the board via 6-inch cable with connector.
The SiFLEX02 RF castellation for off board antenna is not covered in the modular certification. If a host
board is designed that will utilize an off board antenna via the castellated antenna connection an
additional certification will be required. LS Research is equipped with a certification lab and can assist
in getting this done at a very reasonable cost in a short period of time.
An adequate ground plane is necessary to provide good efficiency. The ground plane of the host board
on which the module is mounted increases the effective antenna ground plane size and improves the
antenna performance.
The environment the module is placed in will dictate the range performance The non-ideal
characteristics of the environment will result in the transmitted signal being reflected, diffracted, and
scattered. All of these factors randomly combine to create extremely complex scenarios that will affect
the link range in various ways.
It is also best to keep some clearance between the antenna and nearby objects. This includes how the
module is mounted in the product enclosure. Unless the items on the following list of recommendations
are met, the radiation pattern can be heavily distorted.
Whichever antenna is used, it is best to keep a few things in mind when determining its location.
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Never place ground plane or copper trace routing underneath the antenna.
LSR recommends keeping metal objects as far away from the antenna as possible. At a very minimum
keep the antenna at least 5 cm from any metallic objects, components, or wiring. The farther the antenna
is placed from these interferers, the less the radiation pattern and gain will be perturbed.
Do not embed the antenna in a metallic or metalized plastic enclosure.
If located within a plastic enclosure, keep the enclosure at least 1 cm from the antenna.
The information in this document is subject to change without notice.
330-0009-R3.1
Copyright ? 2009-2012 LS Research, LLC
Page 14 of 40
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