impedance measurement

how do we measure the impedance of a ckt without using an analyzer? can u help me finding the input impedance of this ckt?

Regards and thanks in advance

https://www.edaboard.com/viewtopic.php?p=619707#619707

Of course, in order to perform a measurement, some instruments are needed.

Otherwise you cannot know the impedance of your circuit with a computer simulation because the circuit contain variable components (variable capacitors).

If you are interested to the reflection coefficient module only and if you have a generator look at the following solutions:

You may use, for example, an SWR meter, a popular and cheaper instrument used by amateur radio, the most populr is the "Bird" and may be found on the surplus market.

Another way is the use of a directional coupler, a diode detector and a voltmeter. MiniCircuits sell cheaper couplers.

there is another way.

pl

Hi Alll,

Can you use Birds new BDS system to measure input and out impedance of circuits at power?

Bird Technologies introduces the Bird Diagnostic System (BDS); a non-intrusive, real-time RF signal diagnostic system for in-situ measurement of RF power, impedance, phase and complex waveforms. This breakthrough, a combination of state-of-the-art instrumentation and in-line sensors

Seems worth looking into

Sara