Data Sheet

SAM-M8Q - Data Sheet
UBX-16012619 - R04 Production Information Functional description
Page 13 of 25
 The entire Almanac has been downloaded
 The Ephemeris for each satellite in view is valid
1.18.4 Power Save Mode
For specific power saving applications outside the typical preset power mode setups, users can configure a
tailored Power Save Mode.
Power Save Mode provides two dedicated methods, ON/OFF and Cyclic tracking, that reduce average current
consumption in different ways to match the needs of the specific application. These operations can be set by
using a specific UBX message.
For more information about power management strategies, see the u-blox 8 / u-blox M8 Receiver
Description Including Protocol Specification [2].
1.19 Embedded Antenna
The SAM-M8Q module has an embedded GNSS patch antenna and the signal is further filtered and amplified by
internal SAW filter and internal Low Noise Amplifier (LNA).
Because the customer PCB is part of the antenna solution, some PCB layout design rules should be
followed in order to maintain optimal performance of the on-board GNSS patch antenna. For more
information, see the SAM-M8Q Hardware Integration Manual [1].
1.19.1 Embedded antenna operation
The embedded GNSS patch antenna provides an optimal radiation pattern with a 50x50 mm ground plane. The
GNSS patch antenna is RHCP and has a peak gain of 3 dBiC. The patch antenna is insensitive to surroundings
and has high tolerance against frequency shifts. However, on small ground plane widths, the antenna gain and
radiation efficiency are reduced.
.