User's Manual

SiFLEX01 TRANSCEIVER MODULE

DATASHEET

The information in this document is subject to change without notice.

Antenna Options

The SiFLEX01 module includes multiple antenna options. The module regulatory certification can be

completed with the following options:

Certified Antenna Options

 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.

 Antenna Factor ANT-916-CW-HWR-RPS 900 MHz Dipole Antenna with Reverse Polarity SMA

Connector and PanguTech JQ-0036-L4 MMCX to Reverse Polarity SMA Cable.

Non-certified Antenna Options

 Integrated 3.2-inch wire monopole soldered to the board.

 Off-board antenna using the castellated edge connection to a 50Ω trace on the host board

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.

 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.