NORA-W30 series - System integration manual
UBX-22021119 - R02
Design-in
Page 23 of 52
C1-Public
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Further to the custom PCB and product restrictions, antennas may require tuning/matching to
comply with all the applicable required certification schemes. It is recommended to consult the
antenna manufacturer for the design-in guidelines and plan the validation activities on the final
prototypes like tuning/matching and performance measures. See also
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RF section may be affected by noise sources like hi-speed digital buses. Avoid placing the antenna
close to buses such as DDR or consider taking specific countermeasures like metal shields or
ferrite sheets to reduce interference.
⚠
Take care of the interaction between co-located RF systems like LTE sidebands on 2.4 GHz band.
Transmitted power may interact or disturb the performance of NORA-W30 modules.
3.2.3
On-board antenna design (NORA-W306)
If a plastic enclosure is used, it is possible to use NORA-W306 with the embedded antenna. To reach
optimum operating performance, follow the instructions in this section.
3.2.3.1
NORA-W306
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PCB trace antenna
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The module shall be placed in the center of an edge of the host PCB.
A large ground plane on the host PCB is a prerequisite for good antenna performance. It is
recommended to have the ground plane extending at least 10 mm on the three non-edge sides of
the module. See also
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The host PCB shall include a full GND plane underneath the entire module, with a ground cut out
under the PCB trace antenna according to the description in
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The NORA-W3x6 has six extra GND pads under the antenna that need to be connected for a good
antenna performance. Detailed measurements of the footprint including this extra GND pads can
be found in the NORA-W30 series data sheet
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High / large parts including metal shall not be placed closer than 10 mm to the module’s antenna.
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At least 10 mm clearance between the antenna and the casing is recommended. If the clearance
is less than 10 mm, the antenna performance can be adversely affected.
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The module shall be placed such that the antenna faces outwards from the product and is not
obstructed by any external items in close vicinity of the products intended use case.