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
.