Chip Antenna Design Guidelines - Multitech MultiConnect xDot Developer's Manual

ANTENNAS

Chip Antenna Design Guidelines

When designing antenna placement for the chip antenna, note the following:
The antenna's long side must be along the edge of the ground plane.
Remove the ground plane from all layers below the antenna.
The distance from the antenna to the enclosure or plastic cover should be greater than 1.5 mm.
The distance from the antenna to relatively large perturbations, such as a shield or large components, depends on
the height of surrounding components. It should not be less than 1.5mm.
We recommend a distance equal to or greater than 10mm from the end of the antenna to either end of the PCB
distance. Performance is better from larger distances.
Use the recommended land pattern shown in the figures below. Land patterns are composed of a 50 ohm line
connected to each antenna feed point. Ground clearance around and under the antenna as shown in the PCB
layout is recommended to maximize antenna performance.
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xDot Developer Guide for Japan