SARK 110 - Capacitor

SARK
SARKSARK
SARK-
--
-110
110110
110 User’s Manual
Rev 1.2.6 October 3
rd
, 2015 - 57 - © Melchor Varela – EA4FRB 2011-2015
Fra Self-resonant frequency of the antenna
Z(Fop) Z at operating frequency
Z(Fra) Z at resonant frequency
Rs Equivalent resistance at F = 1 MHz
La Equivalent inductance at F = 1 MHz
Rp Equivalent resistance at the self-resonant frequency
The antenna capacitance is calculated with the following equation:
2
)2(
1
FraLa
Ca
×××
=
π
The series equivalent resistance of the antenna at the operating frequency Fop = 13.56 MHz is
calculated with the following equation:
Rp
LaFop
RsRa
2
)2( ×××
+=
π
The quality factor is calculated using the following equation:
Ra
LaFop
Qa
×
×
×
=
π
2
14.2 Capacitor
This function determines the equivalent circuit model of capacitors. The measurement
procedure is as follows: