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Loop Style
A loop- or trace-style antenna is normally printed
directly on a product’s PCB. This makes it the most
cost-effective of antenna styles. The element can
be made self-resonant or externally resonated with
discrete components, but its actual layout is usually
product specific. Despite the cost advantages,
loop-style antennas are generally inefficient and
useful only for short-range applications. They are
also very sensitive to changes in layout and PCB
dielectric, which can cause consistency issues
during production. In addition, printed styles are
difficult to engineer, requiring the use of expensive
equipment, including a network analyzer. An
improperly designed loop will have a high SWR
at the desired frequency, which can cause instability
Figure 31: Loop or Trace Antenna
Figure 32: SP Series
“Splatch” Antenna
in the RF stage.
Linx offers low-cost planar and chip antennas that mount directly to a
product’s PCB. These tiny antennas do not require testing and provide
excellent performance in light of their small size. They offer a preferable
alternative to the often-problematic “printed” antenna.
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