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NXP Semiconductors
JN-RM-2080
K32W module development reference manual
JN-RM-2080
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© NXP Semiconductors N.V. 2020. All rights reserved.
Reference manual
Rev. 1.0
— 27 Mar 2020
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Controlled impedance trace
(50 ohm microstrip)
RF Match
Printed antenna
µFl connector
Fig 7.
RF Matching Network
4.5 Components
All electronic components have parasitic characteristics that cause the part to act in a
non-ideal way. Typically, these effects become worse as the frequency of operation is
increased.
For most component suppliers, this quality is expressed by the Self Resonant
Frequency (SRF) specification. For example, a capacitor has parasitic inductance
introduced by the metal leads of the components. As frequency increases, at some
point the impedance due to the parasitic inductance is greater than the impedance of
the capacitor, and at that frequency and higher, the component no longer acts as a
capacitor and now acts as an inductor. At the point at which the impedance from both
inductive and capacitive components is the same, the part will resonate as a LC
parallel resonant circuit, and this is called the Self Resonant frequency.
shows some typical response curve.
