Re: I want to document some RF techniques, help please


Dear All,

I’d be a little cautious about that filter chapter- diagram shows the E Field in a transmission line cavity to be parallel with the conductors!

Yes, you can capacitively load a 75 MHz transmission line cavity down to 50 MHz, but you will make a serious sacrifice in Q and achieving correct coupling will require a major re-design.

For 50 MHz, big helical resonators would be my choice.


Alwyn G8DOH


Alwyn Seeds, Director
SynOptika Ltd.,
114 Beaufort Street,
SW3 6BU,

SynOptika Ltd., Registered in England and Wales: No. 04606737
Registered Office: 114 Beaufort Street, London, SW3 6BU, United Kingdom.

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