Anyone has ever used stub tuner?

[hebu]

I use the stub tuner to generate the load of PA, to get the optimum load
impedance. But I want to get the right impedance at fundamental frequency
and the certain impedance at second order harmonic. How can I get this?

Besides, any material talks about how to use 3-stub tuner?

Anyone know the maury microwave?

Thanks,

 

[sergio mariotti]

I use the stub tuner to generate the load of PA, to get the optimum load
impedance. But I want to get the right impedance at fundamental frequency
and the certain impedance at second order harmonic. How can I get this?

This behavior is on the nature of the tuner. I think you must accept different impedence at harmonics frequencies.

Anyone know the maury microwave?

Few companies produces tuners, but, for my opinion, the quality of Maury products is better. Of course Maury is a bit more expensive.

 

[biff44]

You need a diplexer filter, lowpass and highpass ports, and two different stub tuners. The crossover frequency has to be somewhere between the output frequency and its 2nd harmonic.

 

[hebu]

Thanks,

Because I want to try different harmonic termination to PA, so
I need control the impedance at different harmoinc, fundamental, 2nd, 3rd..etc.

1)Maybe, diplexer is good idea, do I need to combine the two branch so that
I can get the true signal from PA?

2)May I control the impedances of 1st and 2nd harmonc in one stub tuner?

 

[marcomdd]

I use the stub tuner to generate the load of PA, to get the optimum load
impedance. But I want to get the right impedance at fundamental frequency
and the certain impedance at second order harmonic. How can I get this?

Besides, any material talks about how to use 3-stub tuner?

Anyone know the maury microwave?

Thanks,

You need an harmonic tuner. The companies that produce it are Maury Microwave and Focus.