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This project entailed a detailed theoretical development of preferred 1st and 2nd order tunable bandpass filters. The three associated reports are:
“Tunable Bandpass Filters- Part I,” J.A. Crawford
“Tunable Bandpass Filters- Part II,” J.A. Crawford
“Tunable Bandpass Filters- Part III,” J.A. Crawford
A shorter article was written for Microwaves & RF for the December 2017 issue as given here:
On-Line Filter Article at Microwaves & RF, J.A. Crawford