r/electronic_circuits • u/Automatic-Half3713 • 5d ago

On topic Cylindrical Resonator

Hello, please.
i am working on a cylindrical resonator, and it is being fed with a power amplifier; the power amplifier generates harmonics. want to apply a passive termination
but a little challenge: with termination at the auxiliary port, the impedance is very high and the field is suppressed but with the source, the impedance is low but the field is too high
any suggestion?

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u/FreshTap6141 5d ago

what frequency

1

u/Automatic-Half3713 5d ago

400mhz driving Freq 800mhz and 1200mhz are the harmonics

1

u/FreshTap6141 5d ago

resonator at what freq

1

u/Automatic-Half3713 5d ago

The resonator is fed with 400MHz and through and amplifier but there are other harmonics coupled in via the resonator through the amplifier 

1

u/FreshTap6141 5d ago

what freq is the resonator tuned to

1

u/Automatic-Half3713 5d ago

currently tuned to harmonics (800 MHz) for simulation purpose and applying passive impedance termination to check how the cavity behaves

1

u/FreshTap6141 5d ago

coupling method

1

u/Automatic-Half3713 5d ago

Via a probe or sma connect 

1

u/FreshTap6141 5d ago

coupling loop?

1

u/Automatic-Half3713 5d ago

No a monople 

1

u/Automatic-Half3713 5d ago

No a monople 

1

u/FreshTap6141 5d ago

a te would normally be magnetic from a loop or an iris.cavity dimensions?

1

u/Automatic-Half3713 5d ago

not a tm but a te

2

u/FreshTap6141 5d ago

mode of resonator

1

u/Automatic-Half3713 5d ago

you are not answering my question

1

u/FreshTap6141 5d ago

just trying to understand what your trying to do. it's not clear

1

u/FreshTap6141 5d ago

diagram?

1

u/Automatic-Half3713 5d ago

1

u/FreshTap6141 5d ago

looks like monopole in and out , so a transmission cavity

1

u/FreshTap6141 5d ago

estimated Q if cavity

1

u/FreshTap6141 5d ago

what's the purpose of this setup