Antenna Parameters

The following reference only information is provided for those who are exploring alternate antenna solutions for their specific use case.

Notes:

The only approved and certified antenna solution is the one provided with the development kit.

Changing the antenna voids any regulatory certifications achieved by the shipping configuration.

General Recommendations

Design Parameter Recommendation
Impedance 50 ohm
Antenna pattern Omnidirectional
MIMO isolation > 15 dB
Envelope correlation coefficient < 0.5
Efficiency > 50% (-3 dB)

Maximum Permitted Gains

Operating Frequency Max Gain
2.4 GHz 3.24 dBi
2.5 GHz 3.47 dBi
5.2 GHz 3.73 dBi
5.5 GHz 4.77 dBi
5.7 GHz 4.77 dBi

Antenna peak gain shall be equal to or less than the value listed.

Comparison Table of Antenna Types

Type Opportunities Obstacles
Chip antenna Easy to implement
Quick time-to-market
Material and assembly costs
Medium performance
PCB monopole antenna No component and replacement costs
Quarter wave monopole has a theoretical gain of ~5.15 dBi
Good performance
Medium level of layout skills needed
Matching circuit recommended
PCB dipole antenna No component and replacement costs
Half-wave dipole has a theoretical gain of ~2.15 dBi
Good performance
Medium level of layout skills needed
Matching circuit recommended
Larger footprint than chip and monopole solutions

See also: Antenna Placement and Antenna Connector Detail.

 

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