1. Introduction
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The FIND4/GPS[X]D4/SHK[G]4 series is a multi-function sharkfin style antenna with 4x4 MiMo for
4G/5G. The GPS[X]D4 incorporates either a single or multiple GPS/ GNSS antennas with 26dB gain
LNA or a single L1/L2/L5 antenna with up to 37dB LNA gain. The GPS[X]D4 type features an M6
mounting stud for an optional comms whip. Note: The SHK[G]4 type does not have this feature .
Versions are available which can include up to 6x6 MiMo dual band WiFi 6e function. The antenna is
suitable for fitment to vehicle panels up to 4mm (0.15”) thick. An extended mounting kit for thicker panels
is available as an accessory.
2. Mounting requirements and selecting location
For optimum performance, it is recommended that all versions of the antenna are fitted on a conductive
(metal) panel, although it is possible to mount the antenna on a non-conductive panel with acceptable
performance for all the internal antenna functions. For GPS[X]D4 type, when a whip is to be used, the
antenna must be fitted on a conductive ground plane - recommended minimum size is 1⁄2 wave length
diameter at the lowest frequency of whip operation. To calculate this size, use formula below:
50 / frequency in MHz = 1⁄2 wavelength (m)
Example: 150MHz =100cm (39.4”); 400MHz = 38cm (15”); 900MHz =16cms (6.3”).
When fitting on a non-metallic panel, a ground plane plate of suitable size should be fabricated and fitted
under the mounting panel.
Electrical Safety Note
The standard GPS[X]D4/SHKG4 contain single or multiple active GPS/GNSS antennas.
Rated voltage: 3-5VDC
Rated current (each antenna): 20mA maximum.
The GPS25D4/SHK25G4 contain a single active GPS/GNSS antenna.
Rated voltage: 3-12VDC. Rated current: 35mA maximum.
The supply to these devices must be provided with over current protection
of 1A maximum.
