6 Designing for Next Gen Wi-Fi Applications
What Are the Consequences for Product
Suppliers?
Interestingly, output power to achieve range is no longer
the most important criteria. Other things are becoming
more important. In the first place, there is "flat power." This
means output power is uniform across the band, ensuring
that all the channels in the band are at maximum strength.
In many products, the channels in the middle of the bands
are strong, but channels at the side of the band have to use
lower power, essentially creating capacity limitations.
To maximize the overall system capacity, the goals are
to achieve maximum output power over all the channels
in the 2.4GHz and 5GHz bands, including the channels
at the edges of the bands otherwise called "band edge
performance." But what is more typical is that the channels
QPF4200 Wi-Fi Module QPF4200 Evaluation Board
• Designed for Wi-Fi 802.11ax systems
• 2412MHz to 2484MHz frequency of
operation
• 15.5dB reception gain
• Evaluate QPF4200 front end Wi-Fi module
• 2.4GHz frequency range
• Reduces the overall power consumption
LEARN MORE
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at the edges of the band have lower output power to meet
radio emission requirements (i.e., to make no noise outside
of the band). Many product suppliers squeeze the output
power of the channels on the edge of the band to meet
the emission requirements, and therefore severely limit
the overall system capacity. Qorvo's edgeBoost™ filter is
designed to maximize output power at the channels close
to the band edge so that the system can support more
users without crowding the middle bands.
And Additional Consequence for
Consumers
Consumers do not like big boxes with large antennas. And
especially with a distributed Wi-Fi router in every room,
consumers want small boxes, preferably with no antennas
sticking out at all.
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