Antenna Placement; Wlan Led - Lantronix PremierWave EN Integration Manual

Both the U.FL to Reverse SMA cable (Lantronix part number 500-180-R-ACC) and the U.FL
to U.FL cable (Lantronix part number 500-181-R-ACC) can be purchased separately as an
accessory from either Lantronix or an RF cable manufacturer. External antennas can be
purchased from the antenna vendor. Components for cable design should be selected for
low loss over the entire 2.4 Ghz to 5.9 Ghz signal range.
Figure 2-3 U.FL to U.FL Cable (P/N 500-181-R-ACC)

Antenna Placement

The PremierWave EN module has an option for an on-board chip antenna. When designing
the PremierWave EN system on module to a mating board, it is important to consider the final
installation of the unit and its location with respect to connecting access points. The
PremierWave EN module should be placed such that the chip antenna has as clear as
possible path to the connecting access point for maximum range. Avoid placing the
PremierWave module such that the on-board chip antenna is blocked by metal walls or
ground planes of adjacent circuit boards. When using external antennas connected to the
U.FL ports the same considerations apply.

WLAN LED

Pin 25 on the PremierWave connector is driven low when the radio has been enabled by
software. This pin may be used to drive an LED for WLAN status. Connect pin 25 to the
cathode of an LED through a 220 ohm resistor. Connect the anode of the LED to 3.3V.
PremierWave® Embedded System on Module Integration Guide
Figure 2-2 Reverse-SMA to U.FL (P/N 500-180-R-ACC)
2: Description and Specifications
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