I have always concidered the real part of a complex impedance to be the resistive part of the circuit. This means that a
measured impedance must have a phase angle between +90 deg to -90 deg. We have an HP 4815A Vector Impedance meter
and an HP 8508 Vector Voltmeter. It is possible to measure an impedance with the phase greater than +90 or less than -90.
Even the HP manuals define inductance for 0 < angle < 180 and capacitance for -180 < angle < 0.
A phase angle greater than +90 or less than -90 obviously, when expressed as real and imaginary parts, has the
real part negative. This implies a negative resistance. It is confusing.
Can anyone shed some light on this problem?
Thank you
measured impedance must have a phase angle between +90 deg to -90 deg. We have an HP 4815A Vector Impedance meter
and an HP 8508 Vector Voltmeter. It is possible to measure an impedance with the phase greater than +90 or less than -90.
Even the HP manuals define inductance for 0 < angle < 180 and capacitance for -180 < angle < 0.
A phase angle greater than +90 or less than -90 obviously, when expressed as real and imaginary parts, has the
real part negative. This implies a negative resistance. It is confusing.
Can anyone shed some light on this problem?
Thank you