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Antenna Options

9704 Modem Output characteristics

ParameterValue
Frequency Range1616 MHz to 1626.5 MHz
Input / Output Impedance50 Ω
Average RF power (Conducted i.e. measured at the RF connector)+32 dBm (1.58W)
Peak RF power (Conducted i.e. measured at the RF connector)+37 dBm (5W)

RockBLOCK 9704-SMA

For each antenna option, the total loss presented by cables and connectors used between the 9704 and antenna must be within the Minimum and Maximum cable loss ranges specified below in order to meet Iridium certification requirements.

The options shown in the table below are based on the following cable and connector loss assumptions for the Iridium 9704 operating frequency range:

LMR240 loss 0.34dB/m

0.1dB per connector.

This page is intended only to act as a guide. Installers are advised to carry out their own calculation and measurement of loss for any RF cable assembly used. 9704 IMT services operate between 1616MHz - 1626.5MHz.

Outside enclosures connectors should have at least an IP66 ingress rating.

In all cases the antenna should be installed pointing vertically at the sky.

9704-SMA

9704 qualified AntennaGainAntenna end ConnectorCableMin lossMax loss
Maxtena (100-00003-02)2.8 dBic (typical)SMA socket - SMA socket bulkhead adaptor (e.g RS 246-9405)LMR240 SMA plug to SMA plug, 1m maximum0dB0.5dB

The 9704-SMA can also be used with the antenna mounted directly at the PCB.

Maxtena (100-00003-02) 3D CAD (STEP)

Maxtena (100-00003-02) sealing against a bulkhead

The antenna is fitted with an o-ring in the base that acts as a gasket when the antenna is screwed down onto a flat smooth surface. In order to maintain both a good electrical connection and seal it is important that the dimensions match the drawing below. Coupler to sealing surface dimensions